Nikos Papanikolaou, Ph.D.

• Professional Background

  Education

  • 1994 - PhD - Medical Physics - University of Wisconsin
  • 1991 - MS - Medical Physics - University of Wisconsin
  • 1989 - BS - Physics (Graduation with Honors) - University of Athens

  Appointments

  • 12/2005 - Professor and Chief, Division of Medical Physics - The University of Texas Health Science Center at San Antonio, Radiation Oncology, San Antonio
  • 2020 - Business School - University of Texas San Antonio

• Instruction & Training

  • 2/2017 - 6/2021, Post-Doctoral Student Supervision, Univ of Texas Health Sciences Center San Antonio
  • 8/2016 - Present, RADI5055 Fund of Dosimetry
  • 8/2015 - Present, Ph.D. Dissertations Directed, University of Texas HSC San Antonio
  • 7/2014 - Present, RADI 6023 Clinical Practices in radiotherapy
  • 8/2008 - Present, Individual Instruction, University of Texas Health Science Center
  • 1/2006 - Present, Medical Dosimetry Certificate Program, Cancer Therapy and Research Center at UTHSCSA
  • 1/2006 - Present, Medical Residency Physics Course, University of Texas Health Science Center San Antonio
  • 1/2006 - Present, Advanced Radiotherapy Physics, The University of Texas Health Science Center
  • 1/2006 - Present, Research, The University of Texas Health Science Center

• Research & Grants

  Grants

  Private

  Funding Agency Brain Lab Title Evaluation of the multiple elements application for simultaneous treatment of multiple brain metastasis Status Complete Period 8/2014 - Present Role Principal Investigator Grant Detail Funding Agency Title ELEKTA - master research agreement Status Active Period 5/2017 - Present Role Co-Principal Investigator Grant Detail We have a master research agreement with ELEKTA and we add every year a list of projects based on a mutually agreed upon SOW. The projects have so far targeted implementation and QA techniques of SRS delivery with the ELEKTA linacs using Monaco RTP Funding Agency Title BrainLab - Spine metastasis Status Active Period 2/2018 - 12/2019 Role Principal Investigator Grant Detail Development of a QA program for a novel SBRT treatment technique of spinal metastasis Funding Agency Title BrainLab - Multiple brain mets project Status Complete Period 1/2017 - 1/2018 Role Principal Investigator Grant Detail Clinical testing and development of a QA program for a mono-isocentric technique to treat multiple brain metastasis

• Publications

  Abstract

  Bassiri, N, Gray, T, David, S, Patel, D, Locker, A, Rasmussen KH, Papanikolaou N, Mayer, K, Kirby NA. Measuring Dose Enhancement from Gold Nanoparticles in an 1921Ir Setup; 2019 Jun. (Medical Physics; vol. 46, no. 6). Licon, A, Stathakis S, Kirby NA, Rasmussen KH, Saenz DL, Papanikolaou N, Myers PA. Effect of Photon Energy on Whole Brain Radiation Therapy; 2019 Jun. (Medical Physics; vol. 46, no. 6). Rembish, J, Myers PA, Rasmussen KH, Kirby NA, Saenz DL, Bry, V, Mavroidis, P, Papanikolaou N, Stathakis S. Evaluating the Effects of Varying Statistical Uncertainity Using a Monte Carlo Based Treatment Planning System; 2019 Jun. (Medical Physics; vol. 46, no. 6). Parenica H, Kabat, C, Fischer, K, Kirby NA, Rasmussen KH, Saenz DL, Myers PA, Mavroidis, P, Papanikolaou N, Stathakis S. Monte Carlo Modeling and Patient Dose Calculation Using DOSXYZnrc for the Elekta Versa HD with the Agility Collimator; 2019 Jun. (Medical Physics; vol. 46, no. 6). Ghahremani, S, Dolormente, K, Ha CS, Livadiotis, G, Papanikolaou N, Rasmussen KH, Kirby NA, Saenz DL, Myers PA, Mavroidis P, Stathakis S. Sensitivity of Dose Volume Objectives On Radiation Therapy Optimization Algorithms; 2019 Jun. (Medical Physics; vol. 46, no. 6). Bui, B, Obeidat, M, Papanikolaou N, Shim EY, Kirby NA. Effects of Variations in Scavenging Conditions On a DNA Dosimeter; 2019 Jun. (Medical Physics; vol. 46, no. 6). Kabat, C, Solis, J, Schantz, T, Graham, B, Defoor, D, Myers PA, Kirby NA, Rasmussen KH, Saenz DL, Jones, W, Mavroidis, P, Papanikolaou N, Stathakis S. An Ideal Planning Assistant Application for Planning Guidance and Patient Review in Radiotherapy; 2019 Jun. (Medical Physics; vol. 46, no. 6). Kabat, C, Mavroidis, P, Parenica, H, Nicewonger, D, Defoor, D, Rasmussen KH, Myers PA, Saenz DL, Kirby NA, Stathakis S, Papanikolaou N. A Flexibel Radiobiological Tool for the Evaluation of Radiotherapy Treatment Plans; 2019 Jun. (Medical Physics; vol. 46, no. 6). Lavdas, E, Papaioannou, M, Tsikrika, A, Pappas, E, Sakkas, G, Roka, V, Kostopoulos, S, Stathakis S, Papanikolaou N, Mavroidis P. Lumbar Spine Imaging-Sagittal Plane: TI FLAIR BLADE with and Without Parallel Imaging Is Superior than TI Turbo Spin Echo; 2019 Jun. (Medical Physics; vol. 46, no. 6). Karakas, Z, Schreiber E, Grimm, J, Cengiz, M, Yazici G, Ozyigit , G, Stathakis S, Papanikolaou N, Das, S, Mavroidis P. SBRT Optimization Using NTCP Objectives Regarding Carotid Blowout Syndrome; 2019 Jun. (Medical Physics). Baley, C, Stathakis S, Myers PA, Kirby NA, Rasmussen KH, Papanikolaou N, Saenz DL. Validation of Simulated Target Motion Spatial Accuracy of Elekta Symmetry Versus 4D CT; 2019 Jun. (Medical Physics; vol. 46, no. 6). Saenz DL, McCulloch, J, Rasmussen KH, Kirby NA, Myers PA, Stathakis S, Papanikolaou N. On the Spatial Accuracy of Single Isocenter Multiple Brain Metastases SRS with BrainLab Elements; 2019 Jun. (Medical Physics; vol. 46, no. 6). Delgado, AB, Rasmussen KH, Kauweloa, K, Pesqueira , Medrano T, Cohen, D, Eng T, Kirby NA, Saenz DL, Shi Z, Stathakis S, Papanikolaou N, Gutierrez, A. A Graphical User Interface GUI toolkit for Treatment Plan Quality Analysis in Right Lung SBRT; 2019 Jun. (Medical Physics; vol. 46, no. 6). Parenica, H, Kabat, C, Kirby NA, Rasmussen KH, Saenz DL, Mavroidis, P, Papanikolaou N, Stathakis S. Treatment Delivery Verification Using ELEKTA Versa HD High-Resolution Log Files; 2019 Jun. (Medical Physics; vol. 46, no. 6). Hammers, J, Lindsay, D, Tan, X, Dooley, J, Stathakis S, Papanikolaou N, Marks, L, Wang, A, Chen, R, Das, S, Mavroidis, P. Evaluation of the Clinical Impact of the Difference Between Planned and Delivered Dose in Prostate Cancer Radiotherapy Based on Daily IGRT and Patient-Reported Outcome Scores; 2019 Jun. (Medical Physics; vol. 46, no. 6). Mavroidis, P, Pearlstein, K, Moon, D, Sheets, N, Kasibhatla, M, Shen, C, Papanikolaou N, Zagar, T, Marks,L, Chera, B, Das, S, Wang, K. NTCP Modeling and Dose-Volume Correlations of Patient Reported Xerostomia 1 Month After Whole-Brain Radiation Therapy; 2019 Jun. (Medical Physics; vol. 46, no. 6). Bales, K, George, R, Naessig, M, Fischer, K, Papanikolaou N, Kirby NA, Myers PA, Saenz DL, Rasmussen KH, Stathakis S. Dosimetric Evaluation of Electron Beam Doses at Various Interfaces; 2019 Jun. (Medical Physics; vol. 46, no. 6). Nicewonger, D, Stathakis S, Papanikolaou N, Kirby NA, Saenz DL, Myers PA, Fakhreddine, M, Rasmussen KH. Improvements in Efficiency and Accuracy for HDR Source Positioning Through the Use of a High Resolution Camera Localization System; 2019 Jun. (Medical Physics; vol. 46, no. 6). Martin, T, Saenz DL, Myers PA, Rasmussen KH, Stathakis S, Papanikolaou N, Kirby NA. An Easy to Create In-House Phantom for TG-132 Deformable Image Registration Evaluation; 2019 Jun. (Medical Physics; vol. 46, no. 6). Bry, V, McCulloch, J, Rembish, J, Papanikolaou N, Crownover RL, Kirby NA, Saenz DL, Myers PA, Stathakis S, Rasmussen KH. Comparing the Accuracy of Surface Guided Imaging to Orthogonal X-Rays for Stereotactic Radiosurgery; 2019 Jun. (Medical Physics; vol. 46, no. 6). Chatzipapas, K, Papadimitroulas, P, Papanikolaou N, Kirby NA, Kagadis, G C. Quantification of DNA Damage After An Ionizing Irradiation Session; 2019 Jun. (Medical Physics; vol. 46, no. 6). Yu, V, Lee, C, Tenn, S, O`Connell, D, Weinstein, L, Skinner, M, McGuinness, C, Saenz DL, Papanikolaou N, Agazaryan, N. Use and Validation of IAEA Correction Factors for Small Field Dosimetry Commissioning: A Multi-Institution Study; 2019 Jun. (Medical Physics; vol. 46, no. 6). Rembish, J, Myers PA, Rasmussen KH, Kirby NA, Saenz DL, Mavroidis, P, Papanikolaou N, Kabat, C, Bice, N, Stathakis S. Developing An Automated Method for Pre-Treatment Data Transfer Checks; 2019 Jun. (Medical Physics; vol. 46, no. 6). McCulloch, J, Bry, V, Papanikolaou N, Saenz DL, Myers PA, Kirby NA, Stathakis S, Rasmussen KH. Quantifying the Effect of Eye Movement on Surface Guided Imaging for Stereotactic Radiosurgery; 2019 Jun. (Medical Physics; vol. 46, no. 6). Hammers, J, Lindsay, D, Tan, X, Pirozzi, S, Stathakis S, Papanikolaou N, Wang, A, Chen, R, Das, S, Mavroidis P. Estimation of Delivered Dose in Prostate Cancer Radiotherapy Based On Daily IGRT: Comparison with Planned Dose and Dependence On Deformable Image Registration Algorithm; 2019 Jun. (Medical Physics; vol. 46, no. 6). Lavdas, e, Papaioannou, M, Tsikrika, A, Pappas, E, Sakkas, G, Roka, V, Kostopoulos, S, Stathakis S, Papanikolaou N, Mavroidis P. Investigation of Origin and Clinical Impact of Different Artifacts in Thorax CT; 2019 Jun. (Medical Physics; vol. 46, no. 6). Myers PA, Kabat, C, Saenz DL, Rasmussen KH, Kirby NA, Papanikolaou N, Stathakis S. A Software Tool to Harvest and Analyze MLC Log Files of the Elekta VersaHD Linear Accelerator; 2019 Jun. (Medical Physics; vol. 46, no. 6). Stanley, D, Alexandrian, A, Trongaard, D, Lee, J, Papanikolaou N, Shi Z, Crownover RL, Kirby NA. Dosimetric Comparison of Acclerated Whole Breast Irradiation with Hypofractionated Simultaneous Integrated Boost vs. Conventionally Fractionated Whole Breast Irradiation and a Sequential Boost with Deep-Inspiration Breath Hold; 2018 Jun. (Medical Physics; vol. 45, no. 6). Jurkovic, I, Papanikolaou N, Stathakis S, Kirby NA, Mavroidis, P. Assessment of the Quality and Accuracy of a Commercial Deformable Image Registration (DIR) Software; 2018 Jun. (Medical Physics; vol. 45, no. 6). Parenica, H, Rembish, J, Saenz DL, Rasmussen KH, Kirby NA, Shi Z, Li Y, Fakhreddine, M, Crownover RL, Ha CS, Papanikolaou N, Stathakis S. Comparison of Collapsed Cone Convolution Superposition and Monte Carlo Dose Calculations for Spine SBRT Dose; 2018 Jun. (Medical Physics; vol. 45, no. 6). Bui, B, McConnell, K, Obeidat, M, Papanikolaou N, Shim EY, Kirby NA. Penumbra and Depth Dose Measurements with a DNA Dosimeter; 2018 Jun. (Medical Physics; vol. 45, no. 6). Parencia, H, Kirby NA, Rasmussen KH, Saenz DL, Fakhreddine, M, Papanikolaou N, Stathakis S. Monte Carlo Modeling of the Elekta Versa HD with the Agility Collimator; 2018 Jun. (Medical Physics). Parenica, H, Rembish, J, Saenz DL, Rasmussen KH, Kirby NA, Shi Z, Li Y, Fakhreddine, M, Crownover RL, Ha CS, Papanikolaou N, Stathakis S. Comparison of Collapsed Cone Convolution Superposition and Monte Carlo Dose Calculations for Spine SBRT Dose; 2018 Jun. (Medical Physics; vol. 45, no. 6). Saenz DL, Papanikolaou N, Rasmussen KH, Kirby NA, Stathakis S, Pappas, E, Li Y. Quality Assurance for Multi-Focal Single Isocenter Stereotactic Radiosurgery Through 3D Gel Dosimetry; 2018 Jun. (Medical Physics; vol. 45, no. 6). Pbeodat. Medical Physics; vol. 45, no. 6). Bedre, M, Alexandrian, A, Papanikolaou N, Stathakis S, Sampson AJ, Rasmussen KH, Saenz DL, Kirby NA. An Open-Source Image Quality Assurance Software for Matlab/Octave; 2018 Jun. (Medical Physics; vol. 45, no. 6). Alexandrian, A, Parenica, H, Kirby NA, Jones W", Mavroidis, P, Papanikolaou N, Stathakis S. Quantitative Evaluation Algorithm for Radiotherapy Plan Evaluation; 2018 Jun. (Medical Physics; vol. 45, no. 6). Kabat, C, Alexandrian, A, Parencia, H, Defoor, D, Papanikolaou N, Stathakis S. Preliminary Treatment Planning Guidance for Superior Radiation Treatments for Cancer Patients; 2018 Jun. (Medical Physics; vol. 45, no. 6). McCulloch, J, Rasmussen KH, Roring, J, Kabat, C, Stanley, D, Licon, A, Crownover RL, Shi Z, Kirby NA, Saenz DL, Stathakis S, Papanikolaou N. Is Surface Imaging Practical for 4D Gating On Animal Patients: A Feasibility Study; 2018 Jun. (Medical Physics; vol. 45, no. 6). Hammers, J, Pirozzi,S, Lindsay, D, Kaidar-Person, O, Papanikolaou N, Stathakis S, Chen, R, Das, S, Mavroidis, P. Evaluation of a Commercial DIR Platform for Contour Propagation in Prostate Cancer Patients Treated with IMRT/VMAT; 2018 Jun. (Medical Physics). Bassiri, N, Galvan, Eva, Crownover RL, Fakhreddine, M, Papanikolaou N, Saenz DL, Stathakis S, Kirby NA, Rasmussen KH. The Effect of Dose Inhomogeniety On Sarcoma HDR Treatments; 2018 Jun. (Medical Physics; vol. 45, no. 6). Hammers, J, Pirozzi, S, Lindsay, D, Kaidar-Person, O, Papanikolaou N, Stathakis S, Chen, R, Das, S, Mavroidis, P. Evaluation of the Dose Delivery Accuracy and Its Dependence On Imaging Modality and Deformable Image Registration Algorithim in Prostate Cancer Patients; 2018 Jun. (Medical Physics; vol. 45, no. 6). Licon, A, Rembish, J, Crownover RL, Saenz DL, Kirby NA, Rasmussen KH, Papanikolaou N, Stathakis S. Feasibility of SRS Delivery for Single Mets Using the Versa HD Linac; 2018 Jun. (Medical Physics; vol. 45, no. 6). Stathakis S, Licon, A, Saenz DL, Kirby NA, Rasmussen KH, Crownover RL, Li Y, Mavroidis, P, Papanikolaou N. Dynamic Conformal Arc Therapy for Lung and Liver SBRT; 2018 Jun. (Medical Physics; vol. 45, no. 6). Rembish, J, Saenz DL, Mavroidis, P, Crownover RL, Myers PA, Papanikolaou N, Stathakis S. Is Monte Carlo Necessary for IntraCranial Stereotactic Radiosurgery?; 2018 Jun. (Medical Physics; vol. 45, no. 6). Brito Delgado, A, Shi Z, Rasmussen KH, Medrano Pesqueira, T, Kauweloa, K, Cohen, D, Eng, T, Kirby NA, Saenz DL, Stathakis S, Papanikolaou N, Gutierrez, A. The Analytical Hierarchy Process (AHP) to Score Plan Quality of Lung SBRT Treatment Plans; 2018 Jun. (Medical Physics; vol. 45, no. 6). Saenz DL, Papanikolaou N, Kirby NA, Stathakis S, Rasmussen KH, Crownover RL, Floyd JR. Dosimetric Assessment of Spine SRS with the Brainlab Elements Treatment Planning System; 2018 Jun. (Medical Physics; vol. 45, no. 6). George, R, Saenz DL, Kirby NA, Rasmussen KH, Stathakis S, Papanikolaou N. A Dosimetric Comparison of ICVI Varian Cones and BrainLab Cones; 2018 Jun. (Medical Physics; vol. 45, no. 6). Ghahremani, S, Stanley,D, Papanikolaou N, Kirby NA, Rasmussen KH, Saenz DL, Jones W", Stathakis S. Institutional Experience of a Commercial Data Base System for Ongoing Daily/Weekly/Monthly QA of Linear Accelerators; 2018 Jun. (Medical Physics; vol. 45, no. 6). Bassiri, N, McCulloch, J, Shi Z, Stathakis S, Saenz DL, Kirby NA, Papanikolaou N, Rasmussen JW. Quantification of Standard and FFF Beam Perturbations with a New Linac Mounted Transmission Detector; 2018 Jun. (Medical Physics; vol. 45, no. 6). Rembish, J, Mal,M, Kabat, C, Nunez, F, Kirby NA, Saenz DL, Rasmussen KH, Parenica, H, Papanikolaou N, Stathakis S. Rapid Database Parsing for Compressed Pinnacle Patient Files; 2018 Jun. (Medical Physics; vol. 45, no. 6). Astorga, N, Saenz DL, Kirby NA, Rasmussen KH, Stathakis S, Papanikolaou N. Pre-Treatment Table Coordinate Prediction for Improving Patient Safety in Radiation Therapy; 2018 Jun. (Medical Physics; vol. 45, no. 6). Stathakis S, Papanikolaou N, Kirby NA, Rasmussen KH, Saenz DL. ChartAlert: Automation for Physics Weekly Patient Chart Checks in Radiation Oncology; 2018 Jun. (Medical Physics; vol. 45, no. 6). Astorga, N, Rasmussen KH, Kirby NA, Roring, J, Stathakis S, Saenz DL, Crownover RL, Papanikolaou N, George R. Design of a Real Time Online Tracking Solution for HDR Inventory; 2018 Jun. (Medical Physics). Papanikolaou N, Hammers, J, Stathakis S, Baltas, D, Chen, R, Das, S, Mavroidis, P. Evaluation of the Deformable Registration of Two Commercial Software Regarding the Estimation of Inter-Fractional Dose Delivery Accuracy of Prostate VMAT Plans; 2018 Jun. (Medical Physics; vol. 45, no. 6). George, R, Stathakis S, Astorga, N, Kirby NA, Saenz DL, Rasmussen KH, Papanikolaou N. Retrospective Analysis of Plan-Of-The-Day Implementation for Prostate Cancer Patients; 2018 Jun. (Medical Physics; vol. 45, no. 6). Lavdas, E, Papaioannou, M, Sarantaenna, L, Apostolopoulou, G, Gogou, L, Papanikolaou N, Stathakis S, Mavroidis, P. Common and Uncommon Artifacts in T1 SAG Sequences of Brain MRI; 2018 Jun. (Medical Physics; vol. 45, no. 6). Kabat, C, Defoor, D, Myers, P, Papanikolaou N, Stathakis S. Multi-Institutional Analysis of Elekta Linear Accelerators Performance Using High-Resolution Log Files; 2018 Jun. (Medical Physics; vol. 45, no. 6). Chatzipapas, K, Papadimitroulas, P, Obeidat, Mohammad, Kirby NA, Loudos, G, Papanikolaou N, Kagadis, G. C. Validating Geant4-DNA for Double Strand Brakes (DSB); 2017 Aug. (Conference Proceedings). Rasmussen KH, Roring, J, Astorga, N, George, R, Stanley, DN, Stathakis S, Saenz DL, Gutierrez, AN, Shi Z, Papanikolaou N. Quantification of Signal Strength Variation Between OSLD Drawers; 2017 Jul. (Medical Physics). DN Stanley, K Mcconnell, Rasmussen KH, AN Gutierrez, Saenz DL, Stathakis S, Papanikolaou N, Kirby NA. Variability of Breast Surface Positioning for Deep Inspiration Breath Hold From An Active Breathing Coordinator; 2017 Jun. (Medical Physics; vol. 44, no. 6). R George, Stathakis S, Papanikolaou N, Saenz DL, Kirby NA, Rasmussen KH. Evaluation of the Effect of Body Habitus and Radiation Therapist On Initial Positioning of Prostate Patients; 2017 Jun. (Medical Physics; vol. 44, no. 6). Papanikolaou N. Quality assurance in MRI for radiotherapy planning; 2016 Sep. (1st European Congress of Medical Physics). Kalaitzakis, G, Papanikolaou N, Boursianis, T., Pappas, E. P., Lahanas, V., Makris, D, Stathakis S, Watts LT, Efstathopoulos, E, Maris, T.G, Pappas, E. A Quality Assurance Test for the Validation of the Spatial and Dosimetric Accuracy of a New Technique for the Treatment of Multiple Brain Mestastases; 2016 Sep. (Physica Medica; vol. 32, no. 3). Maris, T.G., Pappas, E, Boursianis, T., Kalaitzakis, Papanikolaou N, Watts LT, Mazonakis, M., Damilakis, J. 3D Polymer Gel MRI Dosimetry Using a 2D Haste, a 2D TSE and a 2D SE Multi Echo (ME) T2 Relaxometric Sequences: Comparison of Dosimetric Results; 2016 Sep. (Physica Medica; vol. 32, no. 3). DeFoor, D, Papanikolaou N, Stathakis S. Patient Daily Treatment Verification Using MLC Log Files; 2016 Sep. (Physica Medica). Mihailidis D, Papanikolaou N. Tolerance Levels and Methodologies for IMRT Verification; 2016 Sep. (Physica Medica; vol. 32, no. 3). Papanikolaou N. Tolerance levels and methodologies for IMRT verification QA; 2016 Sep. (1st European Congress of Medical Physics). Stanley D, Rasmussen KH, Kirby NA, Papanikolaou N, Gutierrez AN. Commissioning and Acceptance Testing of the C-Rad CatalystHD Surface Imaging System; 2016 Aug. (Medical Physics). Gutierrez AN, Stanley D, Papanikolaou N, Crownover RL. Lung VolumeVariability Assessed by Bh-CBCT in 3D Surface Image Guided Deep InspirationBreath Hold (DIBH) Radiotherapy for Left-Sided Breast Cancer; 2016 Aug. (Medical Physics). Roring J, Stanley D, Papanikolaou N, Gutierrez AN. Initial Evaluation of a Novel 6D QA Phantom (HexaCheck) for Daily 6D Couch Correction Assessment; 2016 Aug. (Medical Physics). Bishop A, Li Y, Papanikolaou N, Kirby NA, Baacke D, Gutierrez AN. Dosimetric Comparison Between Pinnacle3 Auto-Planning and Manual Planning for Lung SBRT Treatments; 2016 Jun. (Medical Dosimetry). Marston T, Eng TY, Baacke D, Kirby NA, Papanikolaou N, Gutierrez AN. Evaluating Treatment Plan Quality between Manual Planning and Auto-Planning in Patients with Prostate and Seminal Vesicles Irradiation; 2016 Jun. (Medical Dosimetry). Jurkovic I, Stathakis S, Papanikolaou N, P Mavroidis. Radiobiologically based analysis of the influence of breathing motion and DIR method on lung treatment plans; 2016 Feb. (Journal of Radiation Oncology; vol. 5, no. 2). Papanikolaou N. Academic and professional opportunities for young medical physicists in US; 2016 Jan. (ECMP 2016). Stathakis S, Mavroidis, P, Tuazon, B, Defoor, D, Kirby NA, Papanikolaou N. Dosimetric and Radiobiological Comparison of Conventional and Monte Carlo Treatment Plans of Lung Tumors Using SBRT; 2016 Jan. (Med Phys). Parenica, H, Ford, J, Mavroidis, P, Li Y, Papanikolaou N, Stathakis S. Quality Improvement Review of Radiation Therapy Treatment Planning in the Presence of Dental Implants; 2016 Jan. (Med Phys; vol. 43, no. 3565). Jurkovic, I, Stathakis S, Markovic, M, Papanikolaou N, Mavroidis, P. Use of Cone Beam CT and Deformable Image Registration for Assessing Geometrical and Dosimetric Variations During Lung Radiotherapy; 2016 Jan. (Med Phys; vol. 43, no. 3672). Jurkovic, I, Stathakis S, Markovic, m, Papanikolaou N, Mavroidis, P. Radiobiological Analysis of the Impact of Daily Patient Deformation and Setup Variations Through the Use of the Cone Beam CT and Deformable Image Registration in Lung Cancer IMRT; 2016 Jan. (Med Phys). Tuazon, B, Mavroidis, P, Papanikolaou N, Stathakis S. Comparison of Pinnacle and Monaco Dose Calculations of SBRT Treatments; 2016 Jan. (Med Phys; vol. 43, no. 3605). Defoor, D, Kabat, C, Papanikolaou N, Stathakis S. Two Years of Radiotherapy Treatments Analyzed Through MLC Log Files; 2016 Jan. (Med Phys; vol. 43, no. 3570). Alexandrian, A, Kabat, C, Roring, J, Papanikolaou N, Stathakis S. Evaluation of Commercially Available System for Patient Specific QA Using Dose Volume Histograms; 2016 Jan. (Med Phys; vol. 43, no. 3526). Roring, J E, Alexandrian, A, Papanikolaou N, Stathakis S. An Assessment of Deviations in Gamma Index Between PTW Octavius4D Phantom Measurements and Various Treatment Planning Systems; 2016 Jan. (Med Phys; vol. 43, no. 3527). Kabat, C, DeFoor, D, Alexandrian, A, Papanikolaou N, Stathakis S. Evaluation of Treatment Delivery Parameters Using High Resolution ELEKTA Log Files; 2016 Jan. (Med Phys; vol. 43, no. 3515). Chatzipapas, C, Papadimitroulas, P, Loudos, G, Papanikolaou N, Kagadis, G. Evaluation of Monte Carlo Simulations Performance for Pediatric Brachytherapy Dosimetry; 2016 Jan. (Med Phys; vol. 43, no. 3472). Defoor, Dwayne, Papanikolaou N, Stathakis S. Interfraction Treatment Monitoring Using Integrated invivo EPID Images; 2016 Jan. (Med Phys; vol. 43, no. 3687). Zehren B, Rasmussen KH, Baacke D, Crownover RL, Kirby NA, Papanikolaou N, Gutierrez AN. Evaluating Treatment Plan Quality and the Dosimetric Differences between Pinnacle Auto-Planning and Manual Treatment Planning in Brain Cancer Patients; 2016 Jan. (Medical Dosimetry). Lirani A, Rasmussen KH, Eng TY, Baacke D, Kirby NA, Papanikolaou N, Gutierrez AN. Investigating the Dosimetric Differences between Manual Planning and Auto-Planning in Patients with Prostate and Pelvic Lymph Nodes Irradiation; 2016 Jan. (Mecical Dosimetry). Rasmussen KH, Baumgarten A, Stanley D, Pelletier C, Corbett M, Jung JW, Feng Y, Huang Z, Ju A, Eng TY, Kirby NA, Gutierrez AN, Stathakis S, Papanikolaou N. Dosimetric Verification of a 3D Printed HDR Skin Brachytherapy Applicator; 2016 Jan. (Medical Physics). Licon, A, Ford J, Defoor, W, Crownover RL, Li Y, Ha CS, Eng TY, Jones W", Papanikolaou N, Stathakis S, Mavroidis, P. A Quantitative Parameter for Treatment Plan Quality; 2016 Jan. (Med Phys; vol. 43, no. 3557). Obeidat, M, Cline, K, Stathakis S, Papanikolaou N, Rasmussen KH, Gutierrez AN, Ha CS, Lee SE, Shim EY, Kirby NA. Radiation Measurements with a DNA Double-Strand-Break Dosimeter; 2016 Jan. (Med Phys; vol. 43, no. 3691). Xavier, C. P., Ferreira, B.C., Khouri, L., Lopes, M., Stathakis S, Papanikolaou N, Mavroidis P. Dose Response Relations for Xerostomia from Head and Neck Cancer Radiation Therapy; 2015 Nov. (International Journal of Radiation Oncology-Biology-Physics; vol. 93, no. 3). Stanley, D.N., Popp, T, Ha CS, Swanson GP, Eng TY, Papanikolaou N, Gutierrez AN. Dosimetric Effect of Photon Beam Energy on VMAT Treatment Plan Quality Due to Body Habitus for Advanced Prostate Cancer; 2015 Nov. (International Journal of Radiation Oncology-Biology-Physics; vol. 93, no. 3). Kauweloa, K, Bergamo, A, Gutierrez AN, Stathakis S, Papanikolaou N, Mavroidis P. Use of the 3-D Biological Effective Dose (BED) for Optimizing Liver Cancer SBRT Treatments; 2015 Nov. (International Journal of Radiation Oncology-Biology-Physics; vol. 93, no. 3). Papanikolaou N, Pappas, E, Maris, T, Forgang, R. Teboh, Stojadinovic, S, Stathakis S, Gutierrez AN. Stereotactic Treatment of Multiple Brain Metastasis: Pseudo in Vivo Evaluation of Three Different Techniques; 2015 Nov. (International Journal of Radiation Oncology-Biology-Physics; vol. 93, no. 3). Bergamo, A, Kauweloa, K, Ha CS, Mavroidis P, Papanikolaou N, Gutierrez AN. Inverse Planned Conformality and Normal Tissue Complication Probability Effects for High Risk Pelvic Lymph Node Irradiation; 2015 Nov. (International Journal of Radiation Oncology-Biology-Physics; vol. 93, no. 3). Moreno C, Li Y, Baacke D, Papanikolaou N, Gutierrez AN. Dosimetric Comparison of 3D-CRT-FFF, IMRT-FF, and IMRT-FFF Techniques for Island Lung Lesions during SBRT; 2015 Jun. (Medical Dosimetry). Williams L, Eng TY, Baacke D, Papanikolaou N, Gutierrez AN, Kirby NA. Dosimetric Comparison of Single and Double Tandem; 2015 Jun. (Medical Dosimetry). Kuchta A, Baacke D, Crownover RL, Shi Z, Gutierrez AN, Papanikolaou N, Stathakis S. An Initial Evaluation of Automated IMRT Planning Compared to Manual Forward Planning IMRT for Breast Tangent Irradiation; 2015 Jun. (Medical Dosimetry). Henry J, Li Y, Baacke D, Papanikolaou N, Gutierrez AN. Dosimetric Quantification of Target Dose Compactness in SBRT Planning using Dual Photon Energy IMRT; 2015 Jun. (Medical Dosimetry). Cline K, Stanley D, Defoor D, Stathakis S, Gutierrez A, Papanikolaou N, Kirby N. An Excel-Based Study Tool for ABR-Style Exams; 2015 Jun. (Med Phys; vol. 42, no. 6). Kauweloa K, Gutierrez A, Stathakis S, Papanikolaou N, Mavroidis P. A Graphical User Interface (GUI) Toolkit Created for Multi-Phase Biological Effective Dose (BED) Calculations Including Statistical Analyses; 2015 Jun. (Med Phys; vol. 42, no. 6). Mavroidis P, Boci N, Kostopoulos S, Ninos C, Glotsos D, Oikonomou G, Bakas A, Roka V, Sakkas G, Tsagkalis A, Chatzivasileiou V, Batsikas G, Cavouras D, Papanikolaou N, Stathakis S, Lavdas E. Reduction of Susceptibility Artifacts by Increasing the Bandwidth (BW) and Echo Train Length (ETL); 2015 Jun. (Med Phys; vol. 42, no. 6). Kagadis G, Alexakos C, Papadimitroulas P, Mihailidis D, Megalooikonomou V, Siablis D, Papanikolaou N, Karnabatidis D. A Cloud Based Application for MRI Brain Image Processing; 2015 Jun. (Med Phys; vol. 42, no. 6). Stanley D, Kirby N, Papanikolaou N, Gutierrez A. Evaluation of the Spatial Reproducibility and Temporal Drift of the CRAD CatalystHD System; 2015 Jun. (Med Phys; vol. 42, no. 6). Jurkovic I, Papanikolaou N, Stathakis S, Mavroidis P. Assessment of Deformable Image Registration Algorithms by Using Different Similarity Measures for the Registration Evaluation; 2015 Jun. (Med Phys; vol. 42, no. 6). Kauweloa K, Bergamo A, Gutierrez A, Stathakis S, Mavroidis P, Papanikolaou N, Kirby N. Uncertainties Associated with Dose Summation of High-Dose Rate Brachytherapy and Intensity Modulated Radiotherapy for Gynecological Cases; 2015 Jun. (Med Phys; vol. 42, no. 6). Jurkovic I, Stathakis S, Li Y, Patel A, Vincent J, Papanikolaou N, Mavroidis P. Motion Analysis and 3D Plane Fit Through the Tumor Center of Mass Positions in the 4DCT Data Set; 2015 Jun. (Med Phys; vol. 42, no. 6). Papanikolaou N, Narayanasamy G, Stathakis S, Pappas E, Kirby N, Mavroidis P, Crownover R, Gutierrez A. A Systematic Analysis of Mono-Isocentric Techniques for the Treatment of Multiple Metastasis; 2015 Jun. (Med Phys; vol. 42, no. 6). Bosse C, Narayanasamy G, Kirby N, Mavroidis P, Papanikolaou N, Stathakis S. Dose Calculation Comparisons Between Monaco, Pinnacle and Eclipse Treatment Planning Systems; 2015 Jun. (Med Phys; vol. 42, no. 6). Defoor D, Obeidat M, Linden P, Kirby N, Mavroidis P, Papanikolaou N, Stathakis S. Error Detection Comparison of EPID and MLC Log File Based IMRT QA Systems; 2015 Jun. (Med Phys; vol. 42, no. 6). Ghahremani S, Chavez R, Li Y, Crownover R, Baacke D, Papanikolaou N, Stathakis S. Flattening Filter Free Beams for Head and Neck IMRT and VMAT Optimization; 2015 Jun. (Med Phys; vol. 42, no. 6). Markovic M, Stathakis S, Jurkovic I, Mavroidis P, Papanikolaou N. Intrinsic Characteristics of the Nine Detectors and Evaluation of Their Performance in Non-Equilibrium Radiation Dosimetry; 2015 Jun. (Med Phys; vol. 42, no. 6). Stathakis S, Defoor D, Linden P, Kirby N, Mavroidis P, Papanikolaou N. MLC Distance Travelled as a Predictor for Motor Failure; 2015 Jun. (Med Phys; vol. 42, no. 6). Komisopoulos G, Buckey C, Stathakis S, Sakellaropoulos G, Kardamakis D, Nikoforidis G, Papanikolaou N, Mavroidis P. The Risk of Secondary Malignancies as An Evaluation Factor in the Comparison of Prostate Cancer Intensity Modulated Radiotherapy (IMRT) and Conformal Radiotherapy (CRT) Treatment Plans; 2015 Jun. (Med Phys; vol. 42, no. 6). Obeidat, M, Cline, K, Stathakis S, Papanikolaou N, Rasmussen KH, Gutierrez AN, Ha CS, Lee SE, Shim EY, Kirby NA. Optimizing the Response and Cost of a DNA Double-Strand Break Dosimeter; 2015 Jan. (Med Phys; vol. 43, no. 3872). Tuohy R, Bosse C, Mavroidis P, Shi Z, Crownover RL, Gutierrez AN, Papanikolaou N, Stathakis S. Strategies for evaluation of daily delivered dose using CBCT Accepted as poster presentation at ASTRO 56th annual meeting,; 2014 Sep. (International Journal of Radiation Oncology *Biology *Physics; vol. 90, no. 1). Hua P, Stathakis S, Ha CS, Eng TY, Baacke D, Papanikolaou N, Gutierrez AN. Pilot Dosimetric Study to Model the Potential Benefit of a Dynamic Collimator during VMAT Delivery of Prostate and Lymph Node Irradiation Treatments; 2014 Jun. (Medical Dosimetry). Stanley D, Papanikolaou N, Gutierrez AN. An Evaluation of the Stability of Image Quality Parameters of Varian On-Board Imaging (OBI) and EPID Imaging Systems; 2014 Jun. (Journal of Applied Clinical Medical Physics; vol. 41, no. 160). Krupela K, Gutierrez AN, Stathakis S, Baacke D, Eng TY, Li Y, Papanikolaou N, Mavroidis P. Radiobiological Evaluation of Different Dose Prescription Approaches; 2014 Jun. (Medical Dosimetry). Popp T, Ha CS, Baacke D, Papanikolaou N, Gutierrez AN. Evaluating Dosimetric Differences between 6MV and 10MV in Large Patients with Prostate and Pelvic Lymph Node Irradiation VMAT Treatments; 2014 Jun. (Medical Dosimetry). Martin K, Stathakis S, Mavroidis P, Baacke D, Eng TY, Papanikolaou N, Gutierrez AN. Dosimetric and Radiobiological Evaluation of Simultaneous Integrated Boost for Prostate + LN versus Two Phase Planning; 2014 Jun. (Medical Dosimetry). Dunlap B, Li Y, Papanikolaou N, Baacke D, Gutierrez AN. Evaluating the Dosimetric Impact of Weekly Isocenter Re-marking on Head and Neck (H&N) IMRT Radiotherapy Treatment Plans using Orthogonal Radiographic Imaging Techniques; 2014 Jun. (Medical Dosimetry). Mavroidis P, Lavdas E, Kostopoulos S, Ninos C, Strikou A, Glotsos D, Vlachopoulou A, Oikonomou G, Economopoulos N, Roka V, Sakkas G, Tsagkalis A, Stathakis S, Papanikolaou N, Batsikas G. Use of Blade Sequences in Cervical Spine MR Imaging for Eliminating Motion, Truncation and Flow Artifacts; 2014 Jun. (Med Phys; vol. 41, no. 141). Court L, Aristophanous M, Bellezza D, Followil D, Kirsner S, Kisling K, Massingill B, Papanikolaou N, Parker B, Pidikiti R, Wong P, Zhen H, Balter P. Credentialing of IGRT Equipment and Processes for Clinical Trials; 2014 Jun. (Med Phys; vol. 41, no. 200). Mavroidis P, Xavier C Peixoto, Costa Ferrerira B, Khouri L, Lopes M do Carmo, Stathakis S, Papanikolaou N. Determination of the Radiobiological Parameters That Describe the Dose-Response Relations of Xerostomia and Disgeusia From Head and Neck Radiotherapy; 2014 Jun. (Med Phys; vol. 41, no. 317). Stathakis S, Avila G, Mavroidis P, Ha CS, Eng TY, Shi Z, Papanikolaou N. Composite IMRT Planning: How Does the Initial Plan Dose Distribution Affect the Boost Plan Optimization?; 2014 Jun. (Medical Physics; vol. 41, no. 6). Narayanasamy G, Cruz W, Breton C, Gutierrez AN, Mavroidis P, Papanikolaou N, Stathakis S. Comparison of Measured Tissue Phantom Ratios (TPR) Against Calculated From Percent Depth Doses (PDD) with and Without Peak Scatter Factor (PSF) in 6MV Open Beam; 2014 Jun. (Med Phys; vol. 41, no. 341). Kauweloa K, Gutierrez AN, Bergamo A, Stathakis S, Papanikolaou N, Mavroidis P. Clinical Analysis of the Approximate Multi-Phase Biological Effective Dose (BED) Calculation; 2014 Jun. (Med Phys; vol. 41). Peixoto Xavier C, Costa Ferreira B, Khouri L, Lopes M, Stathakis S, Papanikolaou N, Mavroidis P. Dosimetric Assessment of the Salivary Glands in Head and Neck Tumour Patients Treated with Radiation Therapy; 2014 Jun. (Med Phys; vol. 41, no. 333). Defoor D, Vazquez Quino L, Stathakis S, Mavroidis P, Papanikolaou N. On the Evaluation of Patient Specific IMRT QA Using EPID, Dynalog Files and Patient Anatomy; 2014 Jun. (Med Phys; vol. 41, no. 281). Jurkovic I, Stathakis S, Li Y, Patel A, Vincent J, Papanikolaou N, Mavroidis P. Evaluation of the Optimal Intensity Modulated Radiation Therapy Plans Done On the Maximum and Average Intensity Projection CTs; 2014 Jun. (Med Phys; vol. 41, no. 262). Bosse C, Tuohy R, Mavroidis P, Shi Z, Crownover R, Papanikolaou N, Stathakis S. Daily Fraction Dose Recalculation Based On Rigid Registration Using Cone Beam CT; 2014 Jun. (Medical Physics; vol. 41, no. 6). Tuohy R, Bosse C, Mavroidis P, Shi Z, Crownover R, Papanikolaou N, Stathakis S. Comparison of Two Commercially Available Programs for the Evaluation of Delivered Daily Dose Using Cone Beam CT (CBCT); 2014 Jun. (Medical Physics; vol. 41, no. 6). Jurkovic I, Stathakis S, Li Y, Patel A, Vincent J, Papanikolaou N, Mavroidis P. Internal Tumor Volume Motion and Volume Size Assessment Using 4D CT Lung Data; 2014 Jun. (Med Phys; vol. 41, no. 173). Papanikolaou N, Tuohy R, Mavroidis P, Eng TY, Gutierrez AN, Stathakis S. Appropriateness Criteria for Deformable Image Registration and Dose Propagation; 2014 Jun. (Med Phys; vol. 41, no. 160). Defoor D, Stathakis S, Mavroidis P, Papanikolaou N. Evaluation of Patient Specific VMAT QA Using Dynalop Files and Treatment Planning System; 2014 Jun. (Med Phys; vol. 41). Stathakis S, Markovic M, Mavroidis P, Papanikolaou N. Characterization of the PTW Synthetic Diamond detector for Radiation Therapy Measurements; 2014 Jun. (Med Phys; vol. 41, no. 315). Tuohy R, Stathakis S, Mavroidis P, Bosse c, Papanikolaou N. Comparison of Two Commercially Available Software Platforms for Deformable Image Registraion; 2014 Jun. (Med Phys; vol. 41, no. 218). Kauweloa K, Gutierrez AN, Bergamo A, Stathakis S, Papanikolaou N, Mavroidis P. Mathematical Analysis of Approximate Biological Effective Dose (BED) Calculation for Multi-Phase Radiotherapy Treatment Plans; 2014 Apr. (Med Phys; vol. 41, no. 344). Choi J, Mavroidis P, Esquivel C, Stathakis S, Papanikolaou N, Eng TY. Radiobiological Evaluation of Cervical Cancer Treatments With HDR Brachytherapy; 2013 Sep. (Int. J. Radiat. Oncol. Biol. Phys. 87 (Suppl. 2), S405 (2013); vol. 87, no. Sup2). Stanley D, Papanikolaou N, Gutierrez AN. Development of a Methodology to Assess the Image Quality of the ExacTracTM Localization System Using the PIPSproTM Software and Unfors RaySafe Xi R/F Detector; 2013 Aug. (Medical Physics). Lavdas E, Mavroidis P, Kostopoulos S, Glotsos D, Roka V, Koutsiaris AG, Batsikas G, Sakkas GK, Tsagkalis A, Notaras I, Stathakis S, Papanikolaou N, Vassiou K. Use of Blade sequences in lumbar spine MR imaging for eliminating motion, pulsatile flow and cross-talk artifacts; 2013 Mar. (AAPM Spring Meeting, Phoenix, Arizona, March 16-19, 2013). Patel AJ, Papanikolaou N, Gutierrez AN. Modeling the Loss of Tumor Control Probability (TCP) Due to Small Geometrical Deviations of LINAC-Based Stereotactic Radiosurgery; 2013 Feb. (IJROBP; vol. 87, no. 2). Knaup, Courtney, Esquivel C, Mavroidis P, Stathakis S, Papanikolaou N. Exploring the dosimetric and radiobiological effects of Prostate seed loss and migration; 2012 May. (Radiother Oncol; vol. 103, no. 2). Knaup C, Mavroidis P, Esquivel C, Stathakis S, Swanson GP, Papanikolaou N. Exploring the Dosimetric and Tumor Control Consequences of Prostate Seed Loss and Migration; 2012 Jan. (Medical Physics; vol. 39). Knaup C, Mavroidis P, Esquivel C, Stathakis S, Swanson G, Papanikolaou N. Radiobiological Comparison of Single and Dual‐Isotope Prostate Seed Implants; 2012 Jan. (medical physics; vol. 39). Mavroidis P, Fuller CD, Giantsoudis D, Duppen JN, Rasch CRN, Thomas Jr CR, Okunieff P, Jones III WE, Kachnic LA, Papanikolaou N. Target delineation in rectal cancer radiotherapy: Radiobiological consequences of atlas implementation; 2012 Jan. (Radiother Oncol; vol. 103, no. Supp1). Vazquez Quino, L, Stathakis S, Gutierrez AN, Esquivel C, Papanikolaou N. IMRT Monte Carlo Dose Calculations for a Novalis TX LINAC Equipped with HD- 120 MLC; 2012 Jan. (Medical Physics; vol. 39). Nayebi, N, Esquivel C, Patel, A, McKinsey, R, Papanikolaou N. Evaluation of the Dosimetric Effects of Delivering a VMAT Plan Optimized for a Straight-Beam Linac on a Bent-Beam Linac; 2012 Jan. (Medial Physics; vol. 39). Vazquez Quino, L, Stathakis S, Gutierrez AN, Esquivel C, Alkhatib, H, Papanikolaou N. MU-EPID an EPID Based Tool for IMRT Quality Assurance; 2012 Jan. (Medical Physics; vol. 39). Kim, S, Stathakis S, Esquivel C, Papanikolaou N, Gutierrez AN. Comparative Evaluation of EBT2 film, Matrixx and PTW729 for Patient Specific Small-Field, High Dose, IMRT Plans; 2012 Jan. (Medical Physics; vol. 39). Myers, P, Stathakis S, Gutierrez AN, Esquivel C, Mavroidis P, Papanikolaou N. Reducing the Arc Span for CSA VMAT Delivery; 2012 Jan. (Medicla Physics; vol. 39). Papanikolaou N, Vazquez Quino, L, Stathakis S, Gutierrez AN, Esquivel C, Alkhatib, H. Assessment of the Dosimetric Significance of Isocenter Shift by Means of EPIDQA; 2012 Jan. (Medical Physics; vol. 39). Regan, M, Stathakis S, Nayebi, N, McKinsey, R, Myers, P, Knaup, C, Vazquez-Quino, L, Gutierrez AN, Esquivel C, Mavroidis P, Papanikolaou N. Three Year Analysis Using Ionization Chamber Array for Patient Specific IMRT QA; 2012 Jan. (Medical Physics; vol. 39). Esquivel C, Stathakis S, Gutierrez AN, Papanikolaou N. Characterization of Relative Doses and Source Strengths for Varios Plaque Sizes and Tumor Dimensions in the treatment of Uveal Melanoma; 2012 Jan. (Medical Physics; vol. 39). Roland T, Tryggestad E, Mavroidis P, Hales R, Papanikolaou N. Application Of The radiobiological P index as a modality discriminator for mobile tumor radiotherapy - A preliminary study involving 4DCT volumes of 18 lung cancer patients; 2011 Oct. (Int J Radiat Oncol Biolo Phys). Mavroidis P, Katsilieri Z, Kefala V, Milickovic N, Papanikolaou N, Karabis A, Zamboglou N, Baltas D. Estimation of the clinical impact of dwell time modulation restriction in HIPO optimized HDR prostate brachytherapy implants; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul?Aug 2011). Knaup C, Mavroidis P, Esquivel C, Swanson GP, Papanikolaou N. Radiobiologically based treatment plan evaluation for prostate seed implant; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Vasquez LA, Fitzpatrick CM, Alkhatib H, Mavroidis P, Papanikolaou N. Evaluation of the stability of the central axis response of an amorphous-silicon EPID used in the continuous mode of image acquisition; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Vasquez LA, Fitzpatrick CM, Chen X, Alkhatib H, Mavroidis P, Papanikolaou N. EPID IMRT QA for brain, and head-neck treatment plans in radiation therapy; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Stathakis S, Esquivel C, Gutierrez AN, Mihailidis D, Buckey C, Myers P, Mavroidis P, Papanikolaou N. Accuracy of a commercially available dose calculation algorithm for small field dosimetry; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Stathakis S, Gutierrez AN, Esquivel C, Kim S, Buckey C, Myers P, Mihailidis D, Mavroidis P, Papanikolaou N. Hypofractionated spine radiotherapy: How do you QA?; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Zalman T, Stathakis S, Esquivel C, Gutierrez AN, Mihailidis D, Mavroidis P, Papanikolaou N. IMRT patient QA with dosimetry check: The effect of detector selection in volumetric dose reconstruction; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Buckey C, Myers P, Esquivel C, Mihailidis D, Mavroidis P, Gutierrez AN, Papanikolaou N, Stathakis S. Evaluation of an in vivo device for daily patient treatment delivery measurements using a Varian linear accelerator; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Buckey C, Myers P, Mavroidis P, Esquivel C, Mihailidis D, Gutierrez AN, Papanikolaou N, Stathakis S. Application of a 2D ionization chamber array for monthly and annual linear accelerator QA; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Zalman T, Stathakis S, Esquivel C, Gutierrez AN, Mihailidis D, Mavroidis P, Papanikolaou N. Investigation of dose reconstruction using the dosimetry check platform for different anatomical sites; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Myers P, Buckey C, Mihailidis D, Mavroidis P, Esquivel C, Gutierrez AN, Papanikolaou N, Stathakis S. VMAT monthly quality assurance using a 2D ionization chamber array; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Myers P, Buckey C, Mihailidis D, Mavroidis P, Esquivel C, Gutierrez AN, Papanikolaou N, Stathakis S. VMAT monthly quality assurance using an in vivo dosimetric device attached to the linac gantry; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul ? Aug 2011). Papanikolaou N, Beck G, Peyton J, Gutierrez AN, Esquivel C, Mavroidis P, Stathakis S. A Web based tool for the implementation of routine linac QA following TG142; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul?Aug 2011). Knaup C, Mavroidis P, Stathakis S, Swanson GP, Papanikolaou N. Sensitivity of tumor control probability to changes in radiobiological parameters; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul?Aug 2011). Esquivel C, Stathakis S, Sath C, Gutierrez AN, Dorward J, Mihailidis D, Mavroidis P, Papanikolaou N. Clinical evaluation of a new commercial dose calculation algorithm; 2011 Jul. (Joint AAPM / COMP Meeting, Vancouver Jul?Aug 2011). Mavroidis, P, Ferreira, B, Papanikolaou N, Lopes, M. The Use of Probability Volume Histograms (PVH) and Iso-Probability of Response Charts in Treatment Plan Evaluation; 2011 Jun. (Medical Physics). Giantsoudi, D, Karabis, A, Mavroidis, D, Baltas, D, Shi C, Papanikolaou N. gEUD-Based Optimization for HDR Prostate Brachyterapy: Numberical Stability and Sensitivity Analysis; 2011 May. (Radiotherapy & Oncology; vol. 99, no. 1). Mavroidis, P, Katsilleri, Z, Kefala, V., Millickovic, N., Papanikolaou N, Karabis, A, Zambogious, N, Baltas, D. Radiobiologically Evaluated Dwell Time Modulation Restriction in Hipo Optimized HDR Prostate Brachytherapy Implants; 2011 May. (Radiotherapy & Oncology; vol. 99, no. 1). Stathakis S, Buckey, C, Mavroidis, P, Swanson GP, Papanikolaou N, Smith, M, Giantsoudi, G, Dzintars, E. A Radiobiological Perspective between IMRT and 3D Conformal Treatment of Prostate Cancer; 2009 Nov. (International Journal of Radiation Oncology, Biology, Phsics; vol. 75, no. 3). Stathakis S, Shi C, Mavroidis P, Swanson GP, Ramer C, Sarkar V, Costa Ferreira B, Komisopoulos G, Giantsoudi D, Papanikolaou N. Use of Megavoltage CT imaging for quantifying treatment setup uncertainties; 2008 Sep. (50th ASTRO Annual Meeting, Boston, MA, USA, Sep 2008). Shi C, Mavroidis P, Esquivel C, Costa Ferreira B, Diaz A, Papanikolaou N. Helical Tomotherapy and MLC-based IMRT in treating brain and cranio-spinal tumors; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Roland T, Rassiah-Szegendi P, Szegedi M, Mavroidis P, Papanikolaou N. A phantom based investigation of the effects of MIP versus AIP derived internal target volumes on 4D treatment planning; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Plataniotis G, Mavroidis P, Adamus-Gorka M, Hyodynmaa S, Papanikolaou N, Lind BK. Association of dose-mass-histogram (DMH) with the expected lung complications from breast cancer radiotherapy; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Papanikolaou N, Stathakis S, Mavroidis P, Ha CS. Planned vs. Delivered Dose Distributions with and without Patient Setup Correction in Helical Tomotherapy; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Komisopoulos G, Mavroidis P, Papanikolaou N, Lind BK. Treatment plan optimization using different methods of dose inhomogeneity regularization; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Karaiskos P, Mavroidis P, Costa Ferreira B, Papanikolaou N, Sandilos P, Koutsouveli E, Skarleas C, Dardoufas K. Investigating the impact of using CT vs CT-MRI images during organ delineation and treatment planning in prostate cancer radiotherapy; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Hyodynmaa S, Mavroidis P, Costa Ferreira B, Axelsson S, Papanikolaou N, Lind BK. Investigating the expected effects of patient positioning, breathing and radiation pneumonitis scoring in breast cancer radiotherapy; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Guo B, Liu Y, Shi C, Mavroidis P, Ha CS, Papanikolaou N. Dose calculation for proton radiotherapy based on Monte Carlo simulation using anatomical detailed human model; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Delichas MG, Mavroidis P, Costa Ferreira B, Shi C, Gutierrez AN, Lind BK, Papanikolaou N, Ha CS. Lung cancer radiotherapy using 3D-CRT, MLC-based IMRT and Helical Tomotherapy; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Buckey C, Stathakis S, Swanson GP, Mavroidis P, Su FC, Papanikolaou N. Dosimetric comparison of prostate treatment modalities; 2008 Sep. (27th ESTRO Annual Meeting, Goteborg, Sweden, Sep 2008). Buckey C, Stathakis S, Swanson GP, Mavroidis P, Su FC, Papanikolaou N. Are current IMRT plans superior to 3D conformal therapy for prostate cancer? A dosimetric comparison; 2008 Sep. (50th ASTRO Annual Meeting, Boston, MA, USA, Sep 2008). Su F, Mavroidis P, Shi C, Stathakis S, Papanikolaou N. Treatment planning for prostate cancer: biologically quantitative comparisons among conventional radiotherapy and three IMRT delivery techniques; 2008 Sep. (50th ASTRO Annual Meeting, Boston, MA, USA, Sep 2008). Su FC, Shi C, Mavroidis P, Papanikolaou N. Radiobiological evaluation on the four-dimensional stereotactic radiotherapy plan; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Stathakis S, Gutierrez AN, Mavroidis P, Papanikolaou N. Dosimetric verification of the CCCS algorithm for spatially fractionate radiation therapy; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Stathakis S, Gutierrez AN, Rassiah P, Mavroidis P, Papanikolaou N. Commissioning of flattening filter free Varian 600C linear accelerator; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Giantsoudi D, Liu Y, Diaz AA, Mavroidis P, Papanikolaou N. Neutron energy and dose considerations of Cf-252 brachytherapy sources for various geometries; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Papanikolaou N, Stathakis S, Mavroidis P. Expected Clinical Impact of the Differences between planned and delivered dose distributions in Helical Tomotherapy; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Esquivel C, Mavroidis P, Shi C, Costa Ferreira B, Lind BK, Gutierrez AN, Stathakis S, Papanikolaou N. Radiobiological comparison of Helical Tomotherapy and MLC-based IMRT for brain and cranio-spinal tumors; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Komisopoulos G, Mavroidis P, Papanikolaou N, Lind BK. Interpretation of the dosimetric results in terms of expected treatment outcome when optimizing treatment plans using different methods of regularizing dose inhomogeneity; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Delichas MG, Costa Ferreira B, Shi C, Gutierrez AN, Lind BK, Papanikolaou N, Mavroidis P. Radiobiological effectiveness of 3D-Conformal Radiotherapy, MLC-based IMRT and Helical Tomotherapy in lung cancer; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Mavroidis P, Su FC, Giantsoudi D, Stathakis S, Komisopoulos G, Shi C, Swanson GP, Papanikolaou N. Radiobiological investigation of the dosimetric effects of daily Megavoltage CT registration techniques on adaptive radiotherapy with Helical Tomotherapy; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Swanson GP, Shi C, Mavroidis P, Stathakis S, Su FC, Ramer C, Sarkar V, Costa Ferreira B, Komisopoulos G, Giantsoudi D, Papanikolaou N. Radiobiologically Quantified Treatment Setup Uncertainties based on Megavoltage (MV) CT Imaging; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Hyodynmaa S, Mavroidis P, Costa Ferreira B, Axelsson S, Papanikolaou N, Lind BK. Radiobiological optimization of breast cancer radiotherapy taking into account patient positioning, breathing and radiation pneumonitis scoring; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Su FC, Mavroidis P, Swanson GP, Buckley KA, Stathakis S, Papanikolaou N. Radiobiological-based comparisons among conventional radiotherapy and IMRT delivery techniques for prostate treatment planning; 2008 Jul. (50th AAPM Annual Meeting, Houston, Texas, USA, Jul 2008, Med Phys; vol. 35, no. 6). Mavroidis P, Costa Ferreira B, Hyodynmaa S, Pitkanen MA, Rajala J, Papanikolaou N, Lind BK. The Impact of Patient Positioning, Breathing, and Radiation Pneumonitis Scoring in the Optimization Of Breast Cancer Radiotherapy; 2007 Sep. (Proceedings in 9th Biennial ESTRO Meeting, Barcelona, Spain, Sep, 2007, Radiother Oncol; vol. 84, no. 1). Swanson GP, Stathakis S, Su S, Shi C, Mavroidis P, Papanikolaou N. Treatment planning for prostate: a quantitative comparison between 3DRTP and three IMRT delivery techniques; 2007 Sep. (Proceedings in 9th Biennial ESTRO Meeting, Barcelona, Spain, Sep 2007, Radiother Oncol; vol. 84, no. 1). Stathakis S, Mavroidis P, Papanikolaou N. Evaluation of dose delivery variations in Helical Tomotherapy using Helical megavoltage CT images; 2007 Sep. (Proceedings in 9th Biennial ESTRO Meeting, Barcelona, Spain, Sep, 2007, Radiother Oncol; vol. 84, no. 1). Papanikolaou N, Costa Ferreira B, Shi C, Lind BK, Mavroidis P. Expected effectiveness of Conformal, Helical Tomotherapy and MLC-based IMRT in lung cancer radiotherapy; 2007 Sep. (Proceedings in 9th Biennial ESTRO Meeting, Barcelona, Spain, Sep, 2007, Radiother Oncol; vol. 84, no. 1). Papanikolaou N, Sarkar V, Lin L, Shi C. Quality assurance of the multileafcollimator with helical tomotherapy: design and implementation; 2007 Jul. (Medical Physics; vol. 34, no. 7). Papanikolaou N, Eller CM, Esquivel C, Shi C, Mavroidis P, Stathakis S. Investigation of the use of transmission type detectors for daily IMRT patient dose reconstruction; 2007 Jul. (Proceedings in 49th AAPM Annual Meeting, Minneapolis, Minnesota, USA, Jul 2007, Med Phys; vol. 34, no. 6). Stathakis S, Sarkar D, Rassiah P, Mavroidis P, Papanikolaou N. Monte Carlo based dose verification for Serial Tomotherapy; 2007 Jul. (Proceedings in 49th AAPM Annual Meeting, Minneapolis, Minnesota, USA, Jul 2007, Med Phys; vol. 34, no. 6). Mavroidis P, Costa Ferreira B, Papanikolaou N, Svensson R, Lind BK, Brahme A. Expected clinical impact of the differences between planned and delivered IMRT dose distributions; 2007 Jul. (Proceedings in 49th AAPM Annual Meeting, Minneapolis, Minnesota, USA, Jul 2007, Med Phys; vol. 34, no. 6). Mavroidis P, Costa Ferreira B, Shi C, Lind BK, Stathakis S, Papanikolaou N. Comparing the expected effectiveness of Helical Tomotherapy and MLC-based IMRT using biological measures; 2007 Jul. (Proceedings in 49th AAPM Annual Meeting, Minneapolis, Minnesota, USA, Jul 2007, Med Phys; vol. 34, no. 6). Papanikolaou N. Imaging for Planning/Verification: In-Room Imaging; 2007 Jan. (Med Phys; vol. 34). Mavroidis P, Costa Ferreira B, Shi C, Penagaricano J, Lind BK, Papanikolaou N. Comparison of dose distributions from Tomotherapy and IMRT treatment plans using the biologically effective uniform dose; 2006 Oct. (Proceedings in 25th ESTRO Meeting, Leipzig, Germany, Oct 2006, Radiother Oncol; vol. 81, no. 1). Mavroidis P, Costa Ferreira, Shi C, Penagaricano J, Lind BK, Papanikolaou N. The use of biologically effective uniform dose in comparing dose distributions from tomotherapy and IMRT treatment plans; 2006 Aug. (Proceedings in World Congress on Medical Physics & Biomedical Engineering, Seoul Korea, Aug 2006). Mavroidis P, Tsougos I, Hyodynmaa S, Papanikolaou N, Axelsson S, Rajala J, Pitkanen MA, Lind BK, Kappas C, Brahme A. The effects of breathing and setup uncertainties on the prediction of radiation pneumonitis from breast cancer radiotherapy; 2005 Sep. (Proceedings in 8th Biennial ESTRO Meeting, Lisboa, Portugal, Sep 2005, Radiother Oncol; vol. 74, no. 1). Papanikolaou N, Shi C, Mavroidis P, Kappas C, Penagaricano J. Plan evaluation using the Biologically Uniform Dose (BUD) concept; 2005 Sep. (Proceedings in 8th Biennial ESTRO Meeting, Lisboa, Portugal, Sep 2005, Radiother Oncol; vol. 74, no. 1).

  Book Chapter

  Rasmussen KH, Bry, V, Papanikolaou N. Surface imaging guided radiotherapy. In: Rasmussen KH, Bry, V, Papanikolaou N. Surface Imaging guided radiotherapy. Boca Raton: CRC Press; 2020. Papanikolaou N, Gutierrez AN, Mavroidis P. Adaptive Treatment Planning in Radiation Therapy Planning and Treatment Optimization. In: Radiation Therapy Planning and Treatment Optimization. In: Brahme A. Comprehensive Biomedical Physics. The Netherlands: Elsevier Science & Tech, ISBN 13: 9780444536327; 2014. Mavroidis P, Lind BK, Baltas D, Papanikolaou N. Use of radiobiological modeling in treatment plan evaluation and optimization of prostate cancer radiotherapy. In: Philippe E. Spiess. Prostate Cancer / Book 2. Croatia: INTECH; 2011. p. 237-260. Papanikolaou N, Gutierrez AN, Stathakis S, Shi C. Self-contained accelerator systems ? Tomotherapy. In: Papanikolaou N, Gutierrez AN, Stathakis S, Shi C. Quality and Safety in Radiotherapy. New York, NY: Taylor & Francis; 2010.

  Journal Article

  Kauweloa, KI, Bergamo, A, Guiterrez, AN, Stathakis S, Papanikolaou, N, Mavroidis, P. Use of 3D biological effective dose (BED) for optimizing multi-target liver cancer treatments Australas Phys Eng Sci Med 2019 Sep;42(3):711-718. Nicewonger D, Myers PA, Saenz DL, Kirby NA, Rasmussen KH, Papanikolaou N, Stathakis S. PTW QUICKCHECKwebline: Daily quality assurance phantom comparison and overall performance Journal of the Balkan Union of Oncology 2019 Aug;24(4):1727-1734. Bergamo, AM, Kauweloa, K, Gan, G, Shi Z, Daniels, J, Crownover RL, Narayanasamy, G, Stathakis S, Mavroidis, P, Papanikolaou N, Gutierrez, A. Correlation between Biological Effective Dose and Radiation-induced Liver Disease from Hypofractionated Radiotherapy J Med Phys 2019 Jul;44(3):185-190. Obeidat, M, McConnell, K., Bui, B, Stathakis S, Rasmussen KH, Papanikolaou N, Shim EY, Kirby NA. Optimizing the response, precision, and cost of a DNA double-strand break dosimeter Phys Med Biol 2019 May;64(10). Markovic,M, Narayanasamy, G, Stathakis S, Mavroidis, P, Jurkovic, I, Saenz DL, Papanikolaou N. Clinical Evaluation of a Two-dimensional Liquid-Filled Ion Chamber Detector Array for Verification of High Modulation Small Fields in Radiotherapy J Med Phys 2019 Apr;44(2):91-98. Kabat C, Defoor D, Myers PA, Kirby NA, Rasmussen KH, Saenz DL, Mavroidis P, Papanikolaou N, Stathakis S. Evaluation of the Elekta Agility MLC performance using high-resolution log files Medical Physics 2019 Jan;46(3):1397-1407. Parenica HM, Ford JR, Mavroidis P, Li Y, Papanikolaou N, Stathakis S. Treatment planning dose accuracy improvement in the presence of dental implants Med Dosim 2019 Jan;44(2):159-166. Chatzipapas KP, Papadimitroulas P, OBeidat M, McConnell KA, Kirby NA, Loudos G, Papanikolaou N, Kagadis GC. Quantification of DNA double-strand breaks using Geant4-DNA Med Phys 2019 Jan;46(1):405-413. Saenz DL, Crownover RL, Stathakis S, Papanikolaou N. A dosimetric analysis of a spine SBRT specific treatment planning system J Appl Clin Med Phys 2019 Jan;20(1):154-159. Stathakis S, Narayanasamy, Ganesh, Licon, Anna Laura, Myers PA, Li Y, Crownover RL, Papanikolaou N. A dosimetric comparison between volumetric-modulated arc therapy and dynamic conformal arc therapy in SBRT Journal of the Balkan Union of Oncology 2019 Jan;24(2):838-843. Jurkovic IA, Stathakis S, Li Y, Patel A, Vincent J, Papanikolaou N, Mavroidis P. Use of lung treatment plans to evaluate DIR algorithms Australas Phys Eng Sci Med 2018 Dec;41(4):837-845. Saenz DL, Li Y, Rasmussen K, Stathakis S, Pappas E, Papanikolaou N. Dosimetric and localization accuracy of Elekta high definition dynamic radiosurgery Physica Medica 2018 Oct;54:146-151. Hussain SS, Huang SB, Bedolla RG, Rivas P, Basler JW, Swanson GP, Hui-Ming Huang T, Narayanasamy G, Papanikolaou N, Miyamoto H, Yeh IT, Reddick RL, Pollock BH, GhoshR, Kumar AP. Suppression of ribosomai protein RPS6KB1 by Nexrutine increases sensitivity of prostate tumors to radiation Cancer Lett 2018 Oct;1(433):232-241. Saenz DL, Astorga NR, Kirby N, Fakhreddine M, Rasmussen K, Stathakis S, Papanikolaou N. A method to predict patient‐specific table coordinates for quality assurance in external beam radiation therapy Journal of Applied Clinical Medical Physics 2018 Sep;19(5):625-631. Saenz DL, Astorga NR, Kirby NA, Fakhreddine M, Rasmussen KH, Stathakis S, Papanikolaou N. A method to predict patient-specific table coordinates for quality assurance in external beam radiation therapy J Appl Clin Med Phys 2018 Sep;19(5):625-631. Licon Laura A, Defoor DL, Ford J, Crownover RL, Li Y, Ha CS, Eng T, Jones W", Mavroidis P, Papanikolaou N, Stathakis S. A quantitative measure for radiation treatment plan quality J BOUN 2018 Sep;23(5):1460-1466. Obeidat M, McConnell KA, Li X, Bui B, Stathakis S, Papanikolaou N, Rasmussen KH, Ha CS, Lee S, Shim EY, Kirby NA. DNA double-strand breaks as a method of radiation measurements for therapeutic beams Med Phys 2018 Jul;45(7):3460-3465. Miften M, Olch A, Mihailidis D, Moran J, Pawlicki T, Molineu A, Li H, Wijesooriya K, Shi J, Xia P, Papanikolaou N, Low DA. Tolerance limits and methodologies for IMRT measurement-based verification QA: Recommendations of AAPM Task Group No. 218 Med Phys 2018 Apr;45(4):53-83. Kauweloa KI, Gutierrez AN, Bergamo AM, Stathakis S, Papanikolaou N, Mavroidis P. Clinical analysis of the approximate, 3-dimensional, biological effective dose equation in multiphase treatment plans Med Dosim 2018 Apr;43(1):11-22. Stanley DN, Rasmussen K, Kirby N, Papanikolaou N, Gutierrez AN. An evaluation of the stability of image quality parameters of Elekta X‐ray volume imager and iViewGT imaging systems Journal of Applied Clinical Medical Physics 2018 Mar;. Stanley DN, Rasmussen K, Kirby N, Papanikolaou N, Gutierrez AN. An evaluation of the stability of image quality parameters of Elekta X-ray volume imager and iViewGT imaging systems J Appl Clin Med Phys 2018 Mar;. Jurkovic I, Kocak-Uzel E, Mohamed AS, Lavdas E, Stathakis S, Papanikolaou N, Fuller DC, Mavroidis P. Dosimetric and Radiobiological Evaluation of Patient Setup Accuracy in Head-and-neck Radiotherapy Using Daily Computed Tomography-on-rails-based Corrections J Med Physics 2018 Mar;43(1):28-40. Tuazon B, Narayanasamy G, Papanikolaou N, Kirby N, Mavroidis P, Stathakis S. Evaluation and comparison of second-check monitor unit calculation software with Pinnacle3 treatment planning system Phys Med 2018 Jan;45:186-191. McConnell KA, Alexandrian A, Papanikolaou N, Stathakis S. Comparative performance evaluation of a new a-Si EPID that exceeds quad high-definition resolution JBUON 2018 Jan;23(2):507-513. McConnell KA, Marston T, Zehren BE, Lirani A, Stanley DN, Bishop A, Crownover RL, Eng T, Shi Z, Li Y, Baacke D, Kirby NA, Rasmussen KH, Papanikolaou N, Gutierrez AN. Dosimetric Evaluation of Pinnacle`s Automated Treatment Planning Software to Manually Planned Treatments Technol Cancer Res Treat 2018 Jan;1. Narayanasamy G, Saenz DL, Defoor D, Papanikolaou N, Stathakis S. Dosimetric validation of Monaco treatment planning system on an Elekta VersaHD linear accelerator Journal of Applied Clinical Medical Physics 2017 Nov;18(6):123-129. Stanley DN, McConnell KA, Kirby N, Gutierrez AN Papanikolaou N, Rasmussen K. Comparison of initial patient setup accuracy between surface imaging and three point localization: A retrospective analysis J Appl Clin Med Phys 2017 Nov;18(6):58-61. Stanley DN, McConnell, K, Kirby NA, Gutierrez, AN, Papanikolaou N, Rasmussen KH. Comparison of Initial Patient Setup Accuracy between Surface Imaging and Three Point Localization: A Retrospective Analysis Journal of Applied Clinical Medical Physics 2017 Sep;. Linares MN, Papanikolaou N, Esquivel C, Eng T, Fuller CD, Sosa M. Prescribed and Measured Dose Differences for an AP-PA TBI Protocol with Compensation Filter and Ergonomic Patient Support J of Med Imaging and Rad Sciences 2017 Sep;48(3):301-306. Mavroidis P, Komisopoulos G, Buckey C, Mavroeidi M, Swanson GP, Baltas D, Papanikolaou N, Stathakis S. Radiobiological evaluation of prostate cancer IMRT and conformal-RT plans using different treatment protocols Phys Med 2017 Aug;40:33-41. Defoor DL, Stathakis S, Roring JE, Kirby NA, Mavroidis P, Obeidat M, Papanikolaou N. Investigation of error detection capabilities of phantom, EPID and MLC log file based IMRT QA methods J Appl Clin Med Phys 2017 Jul;18(4):172-179. Defoor DL, Stathakis S, Roring JE, Kirby NA, Mavroidis P, Obeidat M, Papanikolaou N. Investigation of error detection capabilities of phantom, EPID and MLC log file based IMRT QA methods Journal of Applied Clinical Medical Physics 2017 Jun;18(4):172-179. Narayanasamy, Ganesh, Avila, George, Mavroidis, Panayiotis, Papanikolaou N, Gutierrez A, Baacke, Diana, Shi Z, Stathakis S. Comparison of composite prostate radiotherapy plan doses with dependent and independent boost phases Australas Phys Eng Sci Med 2016 Sep;39(3):727-733. Kauweloa, KI, Gutierrez AN, Stathakis S, Papanikolaou N, Mavroidis P. A graphical user interface (GUI) toolkit for the calculation of three-dimensional (3D) multi-phase biological effective dose (BED) distributions including statistical analyses Comput Methods Programs Biomed 2016 Jul;131:1-12. Ines-Ana Jurkovic, Papanikolaou N, Stathakis S, Li Y, Patel, Abhilasha, Vincent, Jill, Mavroidis P. Assessment of Lung Tumor Motion and Volume Size Dependencies Using Various Evaluation Measures Journal of Medical Imaging and Radiation Sciences 2016 Mar;47(1):30-42. Stathakis S, Balbi, F, Chronopoulos, AT, Papanikolaou N. Monte Carlo modeling of linear accelerator using distributed computing J Boun 2016 Jan;21(1):252-260. Henry J, Moreno C, Crownover RL, Baacke D, Papanikolaou N, Gutierrez AN. On the Dosimetric Quantification of Target Dose Compactness in SBRT Liver Planning using Dual Photon Energy IMRT Journal of Radiosurgery and SBRT 2016 Jan;. Saenz DL, Roring J, Cruz W, Sarkar V, Papanikolaou N, Stathakis S. Commissioning and cross-comparison of four scanning water tanks Journal of Cancer Therapy and Oncology 2015 Dec;4(1):1-9. Narayanasamy G, Zalman T, Ha CS, Papanikolaou N, Stathakis S. Evaluation of Dosimetry Check software for IMRT patient-specific quality assurance J Appl Clin Med Phys 2015 May;16(3):5427-5427. Xiao Y, Kry SF, Popple R, Yorke E, Papanikolaou N, Stathakis S, Xia P, Huq S, Bayouth J, Galvin J, Yin FF. Flattening filter-free accelerators: a report from the AAPM Therapy Emerging Technology Assessment Work Group J Appl Clin Med Phys 2015 May;16(3):5219-5219. Defoor DL, Papanikolaou N, Vazquez-Quino LA, Mavroidis P, Papanikolaou N, Stathakis, S. Anatomy-based, patient-specific VMAT QA using EPID or MLC log files J Appl Clin Med Phys 2015 May;16(3):206-215. Stanley D, Gutierrez AN, Papanikolaou N. An evaluation of the stability of image-quality parameters of Varian on-board imaging (OBI) and EPID imaging systems J Appl Clin Med Phys 2015 Mar;16(2):87-98. Myers P, Stathakis S, Mavroidis P, Papanikolaou N. Pediatric Craniospinal Axis Irradiation: Comparison of Radiation-Induced Secondary Malignancy Estimations Based on Three Methods of Analysis for Three Different Treatment Techniques Technology in Cancer Research & Treatment 2015 Jan;14(2):169-180. Stanley DN, Popp T, Ha CS, Swanson GP, Eng TY, Papanikolaou N, Gutierrez AN. Dosimetric Effect of Photon Beam Energy on VMAT Treatment Plan Quality Due to Body Habitus for Advanced Prostate Cancer Practical Radiation Oncology 2015 Jan;5(4). Stathakis S, Mavroidis P, Markovic M, Myers P, Papanikolaou N. Stereotactic Body Radiation Therapy patient specific quality assurance using a two-dimensional array at extended Source to Surface Distance Journal of the Balkan Union of Oncology 2015 Jan;20(4):1154-1163. Komisopoulos G, Mavroidis P, Rodriguez S, Stathakis S, Papanikolaou N, Nikiforidis GC, Sakellaropoulos GC. Radiobiological Comparison of Helical Tomotherapy, Intensity Modulated Radiotherapy, and Conformal Radiotherapy Accounting for Secondary Malignancy Risks Med Dosim 2014 Aug;39(3). Mavroidis P, Giantsoudis D, Awan MJ, Nijkamp J, Rasch CR, Duppen JC, Thomas CR Jr, Okunieff P, Jones WE 3rd, Kachnic LA, Papanikolaou N, Fuller CD. Consequences of anorectal cancer atlas implementation in the cooperative group setting: Radiobiologic analysis of a prospective randomized in silico target delineation study Radiother Oncol 2014 Jul;111. Kauweloa KI, Gutierrez AN, Bergamo A, Stathakis S, Papanikolaou N, Mavroidis P. Practical aspects and uncertainty analysis of biological effective dose (BED) regarding its three-dimensional calculation in multiphase radiotherapy treatment plans Med Phys 2014 Jul;41(7). Myers P, Stathakis S, Buckey C, Papanikolaou N. VMAT monthly QA using two techniques: 2D ion chamber array with an isocentric gantry mount and an in vivo dosimetric device attached to gantry Journal of Radiotherapy in Practice 2014 Jun;13(2):240-246. Myers PA, Mavroidis P, Komisopoulos G, Papanikolaou N, Stathakis S. Pediatric Cranio-spinal Axis Irradiation: Comparison of Radiation-induced Secondary Malignancy Estimations Based on Three Methods of Analysis for Three Different Treatment Modalities Technol Cancer Res Treat 2014 Mar;13. Vasquez Quino, LA, Chen, X, Fitzpatrick, M, Shi, C, Stathakis S, Gutierrez AN, Esquivel C, Mavroidis P, Alkhatib, H, Papanikolaou N. Patient Specific Pre-treatment QA Verification using an EPID Approach Technol Cancer Res Treat 2014 Jan;13(1):1-10. Stathakis S, Mavroidis P, Shi, C, Xu, J, Giantsoudi, D, Papanikolaou N. Gamma Plus (γ+) index; a new evaluation parameter for quantitative quality assurance Comput Methods Programs Biomed 2014 Jan;114(1):60-69. Markovic, M, Mavroidis P, Esquivel C, Papanikolaou N, Stathakis S. Characterization of a 2-Dimensional liquid-filled ion chamber detector array used for verification of the treatments in radiotherapy Med Phys 2014 Jan;41(5). Mavroidis P, Milickovic, N, Cruz, W, Tselis, N, Karabis A., Stathakis S, Papanikolaou N, Zamboglou N., Baltas, D. Comparison of different fractionation schedules toward a single fraction in HDR brachytherapy as monotherapy for low-risk prostate cancer using 3D radiobiological modes Int J Radiat Oncol Biol Phys 2014 Jan;88(1):216-223. Myers P, Mavroidis P, Esquivel C, Papanikolaou N, Stathakis S. Radiobiological evaluation of three dimensional conformal radiation therapy, SmartArc, and Helical Tomotherapy treatment techniques for pediatric craniospinal axis irradiation J Appl Clin Med Phys 2014 Jan;15. Chalimou I, Lind H, Sakellaropoulos C, Lind BK, Papanikolaou N, Nikiforidis GC, Mavroidis P. Clinical survey for registering treatment decision criteria in advanced non-small-cell lung cancer radiotherapy and determination of the dose-response relationship for 1-year survival J Radiother Pract 2014 Jan;13(1):18-28. Stathakis S, Myers, P, Esquivel C, Mavroidis P, Papanikolaou N. Characterization of a novel 2D array dosimeter for patient-specific quality assurance with volumetric arc therapy Med Phys 2013 Jul;40(7). Tzikas A, Komisopoulos G, Ferreira BC, Hyodynmaa S, Axelsson S, Papanikolaou N, Lavdas E, Lind BK, Mavroidis P. Radiobiological evaluation of breast cancer radiotherapy accounting for the effects of patient positioning and breathing in dose delivery. A meta analysis Technol Cancer Res Treat 2013 Feb;12(1):31-44. Knaup C, Mavroidis P, Swanson GP, Stathakis S, Papanikolaou N. Inclusion of Radiobiological Factors in Prostate Brachytherapy Treatment Planning J Radiother Pract 2013 Jan;12(2):163-172. Mavroidis P, Costa Ferreira B, Papanikolaou N, Lopes M do Carmo. Analysis of fractionation correction methodologies for radiation therapy based on multiple treatment plans Med Phys 2013 Jan;40(3). Lavdas E, Mavroidis P, Topalzikis T, Slatinopoulos V, Roka V, Vlachopoulou A, Papanikolaou N, Stathakis S, Kapsalaki E, Batsikas G. Comparison of the T2-TSE Sagittal BLADE and conventional T2-TSE Sagittal sequences for the visualization of cervical spinal cord in patients with multiple sclerosis - Case report Magn Reson Imag 2013 Jan;31(10):1766-1770. Lavdas E, Topalzikis T, Mavroidis P, Kyriakis I, Roka V, Kostopoulos S, Glotsos D, Zilidis C, Stathakis S, Tsagkalis A, Papanikolaou N, Batsikas G, Arvanitis DL, Vassiou K. Comparison of PD BLADE with fat saturation (FS), PD FS and T2 3D DESS with water exicitation (WE) in detecting articular knee cartilage defects Magn Reson Imag 2013 Jan;31(8):1255-1262. Lavdas, E, Mavroidis P, Kostopoulos S, Glotsos D, Roka V, Koutsiaris AG, Batsikas G, Sakkas GK, Tsagkalis A, Notaras I, Stathakis S, Papanikolaou N, Vassiou K. Elimination of motion artifacts using Blade sequences in lumbar spine MR imaging Magn Reson Imag 2013 Jan;31(6):882-890. Knaup, C, Mavroidis P, Esquivel C, Stathakis S, Swanson GP, Papanikolaou N. Radiobiological Comparison of Single and Dual-Isotope Prostate Seed Implants J Radiother Pract 2013 Jan;12(2):154-162. Giantsoudi, D, Baltas, D, Karabis, A, Mavroidis P, Zambogiou, N., Tsells, N., Shi, C, Papanikolaou N. A gEUD-based inverse planning technique for HDR prostate brachytherapy: Feasibility study Med Phys 2013 Jan;40(4). Dzintars E, Papanikolaou N, Mavroidis P, Sadeghi KA, Stathakis S. Application of an independent dose calculation software for estimating the impact of inter-fractional setup shifts in Helical Tomotherapy treatments Phys Med 2013 Jan;29(6):615-623. Roland T, Tryggestad E, Mavroidis P, Hales R, Papanikolaou N. The radiobiological P+ index for pretreatment plan assessment with emphasis on four-dimensional radiotherapy modalities Med Phys 2012 Oct;39(10):6420-6430. Knaup C, Mavroidis P, Esquivel C, Stathakis S, Swanson GP, Baltas, Dimos, Papanikolaou N. Investigating the Dosimetric and Tumor Control Consequences of Prostate Seed Loss and Migration Med Phys 2012 Jan;39(6):3291-3298. Stathakis S, Esquivel C, Vasquez Quino LA, Myers P, Calvo O, Mavroidis P, Gutierrez AN, Papanikolaou N. Accuracy of the small field dosimetry using the Acuros XB dose calculation algorithm within and beyond heterogeneous media for 6MV photon beams Int J Med Phys Clin Eng Radiat Oncol 2012 Jan;1(3):78-87. Tzikas A, Karaiskos P, Papanikolaou N, Sandilos P, Koutsouveli E, Lavdas E, Scarleas C, Dardoufas K, Lind BK, Mavroidis P. Investigating the clinical aspects of using CT vs. CT-MRI images during organ delineation and treatment planning in prostate cancer radiotherapy Technol Cancer Res Treat 2011 Jun;10(3):231-242. Chandraraj V, Stathakis S, Manickam R, Esquivel C, Supe SS, Papanikolaou N. Comparison of four commercial devices for RapidArc and sliding window IMRT QA J Appl Clin Med Phys 2011 Apr;12(2):3367-3367. Mavroidis P, Su FC, Giantsoudi D, Stathakis S, Komisopoulos G, Shi C, Swanson G, Papanikolaou N. Radiobiological and dosimetric analysis of daily megavoltage CT registration on adaptive radiotherapy with Helical Tomotherapy Technol Cancer Res Treat 2011 Feb;10(1):1-13. Mavroidis P, Shi C, Plataniotis GA, Delichas MG, Ferreira BC, Rodriguez S, Lind BK, Papanikolaou N. Comparison of the helical tomotherapy against the multileaf collimator-based intensity-modulated radiotherapy and 3D conformal radiation modalities in lung cancer radiotherapy Br J Radiol 2011 Feb;84(998):161-172. Knaup C, Mavroidis P, Esquivel C, Baltas D, Stathakis S, Swanson GP, Papanikolaou N. Radiobiologically based treatment plan evaluation for prostate seed implants J Contemp Brachyther 2011 Jan;3(2):74-83. Knaup, C, Mavroidis P, Stathakis S, Smith, M, Swanson GP, Papanikolaou N. Evaluation of the effect of prostate volume change on tumor control probability in LDR brachytherapy J Contemp Brachyther 2011 Jan;3(3):125-130. Su FC, Mavroidis P, Shi C, Ferreira BC, Papanikolaou N. A graphic user interface toolkit for specification, report and comparison of dose-response relations and treatment plans using the biologically effective uniform dose Comput Methods Programs Biomed 2010 Oct;100(1):69-78. Mavroidis P, Tzikas A, Papanikolaou N, Lind BK. Toolkit for determination of dose-response relations, validation of radiobiological parameters and treatment plan optimization based on radiobiological measures Technol Cancer Res Treat 2010 Oct;9(5):523-537. Buckey CR, Stathakis S, Papanikolaou N. The inter- and intrafraction reproducibilities of three common IMRT delivery techniques Med Phys 2010 Sep;37(9):4854-4860. Roland T, Mavroidis P, Shi C, Papanikolaou N. Incorporating system latency associated with real-time target tracking radiotherapy in the dose prediction step Phys Med Biol 2010 Apr;55:2651-2668. Roland T, Shi C, Liu Y, Crownover R, Mavroidis P, Papanikolaou N. Tradeoffs for assuming rigid target motion in MLC-based real time target tracking radiotherapy: a dosimetric and radiobiological analysis Technol Cancer Res Treat 2010 Apr;9(2):199-210. Varatharaj C, Stathakis S, Ravikumar,M, Esquivel C, Knaup, C, Myers,P, Papanikolaou N. Consistency and Reproducibility of the VMAT Plan Delivery Using Three Independent Validation Methods Journal of Applied Clinical Medical Physics 2010 Jan;12:129-140. Su FC, Shi C, Mavroidis P, Goytia V, Crownover R, Rassiah-Szegedi P, Papanikolaou N. Assessing four-dimensional radiotherapy planning and respiratory motion-induced dose difference based on biologically effective uniform dose Technol Cancer Res Treat 2009 Jun;8(3):187-200. Mavroidis P, Ferreira B.C., Shi C, Delichas M.G., Lind B.K., Papanikolaou N. Comparison of the Helical Tomotherapy and MLC-based IMRT Radiation Modalities in Treating Brain and Cranio-spinal Tumors Technol Cancer Res Treat 2009 Feb;8(1):3-14. Mavroidis P, Stathakis S, Gutierrez AN, Esquivel C, Shi C, Papanikolaou N. Expected clinical impact of the differences between planned and delivered dose distributions in Helical Tomotherapy for treating head and neck cancer using Helical Megavoltage CT Images J Appl Clin Med Phys 2009 Jan;8(3). Mavroidis P, Komisopoulos G, Lind BK, Papanikolaou N. Interpretation of the dosimetric results of three uniformity regularization methods in terms of expected treatment outcome Med Phys 2008 Nov;35(11):5009-5018. Roland T, Esquivel C, Stathakis S, Papanikolaou N. On the evaluation of the relative sensitivity of commercial TLD readers using well characterized TLD chips J BUON 2008 Oct;13(4):547-551. Mavroidis P, Costa Ferreira B, Shi C, Lind BK, Papanikolaou N. Comparison of the 3D-Conformal, Helical Tomotherapy and MLC-based IMRT radiation modalities using radiobiological measures J BUON 2008 Jan;13:75-86. Mavroidis P, Costa Ferreira B, Shi C, Lind BK, Papanikolaou N. Treatment plan comparison between Helical Tomotherapy and MLC-based IMRT using radiobiological measures Phys Med Biol 2007 Jan;52:3817-3836. Mavroidis P, Ferreira C, Papanikolaou N, Svensson, Kappas C, Lind B, Brahme A. Assessing the Difference Between Planned and Delivered Intensity-Modulated Radiotherapy Dose Distributions Based on Radiobiological Measures Clin Oncol 2006 Sep;18(7):529-538. Mavroidis P, Costa Ferreira B, Komisopoulos G, Sotiriadou K, Soulimioti G, Lavdas E, Shi C, Lind BK, Papanikolaou N. Comparison of Helical Tomotherapy and Intensity Modulated Radiation Therapy treatment plans using radiobiological measures Forum of Clinical Oncology 2001 Feb;8(3-4):124-137. Merger-Wells CM, Mackie TR, Podgorasak MB, Holmes M, Papanikolaou N, Reckwerdt P, Cygler J, Rogers DWO, Bielajew AF, Schmidt D, Muehlenkamp J. Measurements of the electron dose distribution near inhomogeneities using a plastic scintillation detector Int Journ Rad. Onc. Biol. Phys 1994 Jul;29(5):1157-1165.