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Stathakis, Sotirios

Contact

210-450-5664

stathakis@uthscsa.edu

Programs

D.M.P. (Doctorate of Medical Physics)
Ph.D. in Radiological Sciences

Departments & Divisions

Department of Radiation Oncology

Institutes and Centers

Sotirios  Stathakis, Ph.D.

Professor

Dr. Stathakis is an Associate Professor in the Department of Radiation Oncology and Radiology at the University of Texas Health Science Center in San Antonio. His research interests include Image-guided, Intensity Modulated Radiotherapy (IG-IMRT), Patient Specific Quality Assurance, Dose Calculation Algorithms, Advanced Treatment Planning Techniques and Stereotactic Body Radiotherapy.

  • Professional Background

    Education

    • 2005 - PhD - Medical Physics - University of Patras
    • 1997 - MS - Medical Physics - Medical Physics and Bio-engineering Department, University of Aberdeen
    • 1995 - BS - Honors Physics (Honors) - University of Waterloo

    Appointments

    • 9/2018 - Professor/Clinical and Associate Chief of Medical Physics Division - UTHSA, Radiation Oncology, San Antonio
    • 9/2013 - Associate Director - UTHSCSA, Radiation Oncology, San Antonio
    • 9/2013 - Associate Professor - UTHSCSASan Antonio
    • 4/2012 - Chief Medical Physicist - South Texas VHA, Radiation Oncology, San Antonio

  • Instruction & Training

    • 7/2017 - 12/2024, RADI6034 - Clinical Rotation 4, UTHSCSA
    • 9/2016 - Present, Pre-Doctoral Student Supervision, UTHSCSA
    • 9/2015 - Present, Pre-Doctoral Student Supervision, UTHSCSA
    • 9/2015 - Present, Pre-Doctoral Student Supervision, UTHSCSA
    • 7/2014 - 12/2024, RADI6025 - Clinical Rotation 1, UTHSCSA
    • 7/2014 - 12/2024, RADI6032 - Clinical Rotation 3
    • 7/2014 - 12/2024, RADI6026 - Clinical Rotation 2
    • 7/2014 - 6/2024, Clinical Medi Physics Lab, The University of Texas Health Science Center
    • 3/2007 - Present, Dosimetry Review Course, UTHSCSA

  • Research & Grants

    Grants

    Private

    Funding Agency PTW NY Title PTW Water Tank characterization Status Complete Period 6/2016 - 5/2017 Role Principal Investigator Grant Detail A new water tank system for radiation therapy beam measurements is available from PTW. The purpose of this grant was to characterize the performance of the water tank system and compare it against existing ones. Funding Agency ELEKTA Title ELEKTA Monaco research Grant Status Complete Period 5/2016 - 4/2017 Role Principal Investigator Grant Detail the purpose of this grant was to evaluate the Monaco treatment planning system. This system has a Monte Carlo dose calculation algorithm. The dose to low density tissue and at tissue interfaces was evaluated for its accuracy.
    Phantom studies as well as retrospective patient studies were used for this research. Comparisons against established treatment planning systems and measurements were also made.

  • Publications

    Abstract

    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). 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). 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). 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). 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). 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). Pbeodat. 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). DeFoor, D, Papanikolaou N, Stathakis S. Patient Daily Treatment Verification Using MLC Log Files; 2016 Sep. (Physica Medica). Alexandrian, A, Kabat, C, Defoor, W, Saenz DL, Rasmussen KH, Kirby NA, Gutierrez AN, Papanikolaou N, Stathakis S. Tracking Trends of TG-142 Parameters Via Analysis of Data Recorded by 2D Chamber Array; 2016 Jun. (Med Phys; vol. 43, no. 6). Saenz DL, Stathakis S. Differences in Lung Sparing in Deep Inspiration Breath-Hold and Free Breathing Breast Plans Calculated in Pinnacle and Monaco; 2016 Jun. (Medical Physics; vol. 43, no. 6). Stathakis S, Defoor, D, Saenz DL, Kirby NA, Mavroidis, P, Papanikolaou N. SRS Dose Calculation Accuracy Comparison Between Pencil Beam and Monte Carlo Algorithms; 2016 Jun. (Med Phys; vol. 43, no. 6). 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). 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). 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). 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). 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). Defoor, Dwayne, Papanikolaou N, Stathakis S. Interfraction Treatment Monitoring Using Integrated invivo EPID Images; 2016 Jan. (Med Phys; vol. 43, no. 3687). 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). 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). 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. 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). 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). 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). 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). 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). 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). 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, 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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, 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, 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). Narayanasamy G, Saenz DL, Cruz W, Mavroidis P, Papanikolaou N, Stathakis S. Commissioning An Elekta VersaHD Linear Accelerator; 2015 Jun. (Medical Physics; vol. 42, no. 6). Roring J, Saenz DL, Cruz W, Papanikolaou N, Stathakis S. Analysis of Variability and Stability Between Two Water Tank Phantoms Utilizing Water Tank Commissioning Procedures; 2015 Jun. (Medical Physics; vol. 42, no. 6). 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). Saenz DL, Narayanasamy G, Cruz W, Papanikolaou N, Stathakis S. End-To-End Dosimetric Testing of a Versa HD Linear Accelerator with the Agility Head Modeled in Pinnacle; 2015 Jun. (Medical Physics; 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). 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). 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). 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). 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). Avila GE, Mavroidis P, Papanikolaou N, Gutierrez AN, Baacke D, Shi Z, Stathakis S. Comparison of independent dual phase (initial + boost) planning vs. planning the boost considering the existing dose distribution; 2014 Jun. (Medical Dosimetry). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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, 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). 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). Stathakis S, Fan J, Li J, Ma C. The Effect of IMRT Treatment on Second Malignancies; 2006 Nov. (48th Annual Meeting of the American Society for Therapeutic Radiology and Oncology). Klein E, Vicic M, Ma C, Li J, Stathakis S, DA Low. Planning, Delivery and Optimization of Dynamically Modulated Electrons; 2006 Nov. (48th Annual Meeting of the American Society for Therapeutic Radiology and Oncology). Tsiakalos M, Stathakis S, Kappas S, Theodorou K. Photon Energy Choice in the Case of Low Density Tissues Carlo Dosimetric Evaluation; 2006 Sep. (World congress on Medical Physics and Biomedical Engineering 2006). Fan J, Li J, Luo W, Fourkal E, Stathakis S, Lin T, Ma C. Aperture-Based Beam Delivery for Intensity Modulated Proton Therapy; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). S Stathakis, K Paskalev, J Li, C Ma. Determination of Skin Dose for Modulated Electron Radiation Therapy (MERT; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Chen Z, Ma C, Li L, Paskalev K, Price R, Luo W, Fan J, Stathakis S, Chen Y, Lin T, Chen L. Effect of Voxel Size On Monte Carlo Dose Calculation for Intensity Modulated Radiotherapy Treatment Planning; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Ma C, Li J, Stathakis S, Leal A, DuPlessis F, Fan J, Chen Y, Chen L, McNeeley S, Price R. Advanced Mixed Beam Radiotherapy for Breast and Head and Neck; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Ma C, Veltchev I, Fourkal E, Li J, Fan J, Lin T, Luo W, Stathakis S. Laser-Accelerated Proton Therapy: Target Chamber Design and Shielding Requirements; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Caneva S, Tsiakalos M, Stathakis S, Zefkili S, Mazal A, Rosenwald J. Application of the Quality Index Methodology for Dosimetric Verification of Build-Up Effect Beyond Air-Tissue Interface in Treatment Planning System Algorithms; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Li J, Freedman G, Stathakis S, Anderson P, Ma C-M. Acute Skin Toxicity for Woman Receiving Radiation for Breast Cancer in Relation to the Skin Dose; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). J Fan, Li J, Chen L, Price R, Paskalev K, Chen Z, Stathakis S, Luo W, Ma C. Generic Source Models for Commonly Used Clinical Accelerator Beams for Monte Carlo Treatment Planning; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). Stathakis S, Li J, Ma C-M. A New Monte Carlo Treatment Planning Toolkit for Modulated Electron Radiation Therapy (MERT; 2006 Jul. (48th Annual Meeting of the American Association of Physicists in Medicine). J Yang, J Li, L Chen, Z Chen, W Luo, J Fan, S Stathakis, R Price, and C Ma. Monte Carlo Investigation of Heterogeneity Effect for Head and Neck IMRT; 2005 Jul. (47th Annual Meeting of the American Association of Physicists in Medicine). S Stathakis, J Fan, J Li, and C Ma. The Impact of Prostate IMRT On Radiation Induced Malignancies; 2005 Jul. (47th Annual Meeting of the American Association of Physicists in Medicine). S Stathakis, J Li, K Paskalev, J Yang, L Wang, and C Ma. Determination of Skin Dose for Hypo-Fractionated Breast Treatment Using Mixed Photon and Electron Beams; 2005 Jul. (47th Annual Meeting of the American Association of Physicists in Medicine). A Leal, C Ma, F du Plessis, JI Lagares, J Li, L Quin, W Xiong, S Stathakis, W Luo, and Z Chen. Energy and Intensity Modulated Electron Radiation Therapy Using a Monte Carlo Optimization Procedure; 2005 Jul. (47th Annual Meeting of the American Association of Physicists in Medicine). N Papanikolaou, S Stathakis, Y Tsougos, C Kappas. The Effect of Tissue Inhomogeneity On IMRT; 2001 Jul. (43rd Annual Meeting of the American Association of Physicists in Medicine; vol. 2001). Narayanasamy G, Bosse C, Saenz DL, Cruz W, Mavroidis P, Papanikolaou N, Stathakis S. Commissioning of Monaco Treatment Planning System On An Elekta VersaHD Linear Accelerator; 2001 Feb. (Medical Physics; vol. 42, no. 6).

    Book Chapter

    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

    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. 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. 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. 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. 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. 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. 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. 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. 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. Obeidat M, Narahanasamy G, Cline K, Stathakis S, Pouliot P, Kim H, Kirby NA. Comparison of different QA methods for deformable image registration to the known errors for prostate and head-and-neck virtual phantoms Biomedical Physics & Engineering Express 2016 Nov;2(6). 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. Narayanasamy G, Stathakis S, Gutierrez AN, Pappas E, Crownover R, Floyd JR, Papanikolaou N. A Systematic Analysis of 2 Monoisocentric Techniques for the Treatment of Multiple Brain Metastases Technol Cancer Res Treat 2016 Sep;:1-6. Saenz DL, Kim H, Chen J, Stathakis S, Kirby NA. The level of detail required in a deformable phantom to accurately perform quality assurance of deformable image registration Physics in Medicine and Biology 2016 Aug;61(17):6269-6280. 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. Narayanasamy G, Cruz W, Saenz DL, Stathakis S, Papanikolaou N, Kirby N. Effect of electron contamination on in vivo dosimetry for lung block shielding during TBI J Appl Clin Med Phys 2016 Jan;17(3):486-491. 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, Saenz DL, Cruz W, Ha CS, Papanikolaou N, Stathakis S. Commissioning An Elekta VersaHD Linear Accelerator J Appl Clin Med Phys 2015 Sep;17(1):1-13. Saenz, DL, Narayanasamy, G, Cruz, W, Papanikolaou N, Stathakis S. Pinnacle3 modeling and end-to-end dosimetric testing of a Versa HD linear accelerator with the Agility head and flattening filter-free modes J Appl Clin Med Phys 2015 Aug;17(1):1-15. 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. 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. 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. 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). 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. 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). 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, Swanson GP, Stathakis S, Papanikolaou N. Inclusion of Radiobiological Factors in Prostate Brachytherapy Treatment Planning J Radiother Pract 2013 Jan;12(2):163-172. 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. 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, 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. 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. 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. 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. 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. 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. Buckey CR, Stathakis S, Papanikolaou N. 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