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Taxonomy: TH- Small Animal RT: Quality Assurance

MO-C930-GePD-F7-3	Commissioning and Validation of the Dolphin Transmission Detector and Compass Software T Knewtson1*, S Pokhrel1 , A Wiles1 ,A Baker3, M Ballo1,2 , E W Izaguirre1,2 , (1) university Tennessee Health Science Center, Methodist university Hospital, Memphis, TN., (2) West Cancer Center, Germantown, TN., (3) Methodist Healthcare, Memphis,TN.
MO-E115-GePD-F7-1	Benchmarking Beam Data for a Halcyon Accelerator T Zhu*, A Dimofte , C Kennedy , J Zou , D Mihailidis , University of Pennsylvania, Philadelphia, PA
MO-E115-GePD-F7-4	Initial Evaluation of the Clinical Reliability of a New Treatment Delivery System Design JDP Hoisak*, G Kim , K Moore , T Pawlicki , UC San Diego, La Jolla, CA
MO-K-DBRA-4	Feasibility of Using Machine Learning Techniques to Predict the Results of VMAT Patient-Specific QC Measurements DA Granville1*, JG Sutherland1,2,3 , DJ La Russa1,2,3 , (1) The Ottawa Hospital, Ottawa, ON, (2) The University of Ottawa, Ottawa, ON, (3) The Ottawa Hospital Research Institute, Ottawa, ON
SU-E-DBRA-7	The 50th Anniversary of the Radiological Physics Center/IROC Houston QA Center Activities and Findings D Followill*, J Lowenstein , P Taylor , A Molineu , P Alvarez , G Ibbott , W Hanson , S Kry , MD Anderson Cancer Ctr., Houston, TX
SU-F-209-5	Use of Small 3D Radiochromic Dosimeters and a Motion Phantom for Dose Verification of Dynamic MLC Tracking Radiotherapy F Costa1*, M Menten1 , S Doran2 , J Adamovics3 , I Hanson1 , S Nill1 , U Oelfke1 , (1) The Institute of Cancer Research and The Royal Marsden NHS Foundation Trust, London, (2) CRUK Cancer Imaging Centre, The Institute of Cancer Research, London, (3) Rider University, Lawrenceville, NJ
SU-F-KDBRA2-4	Geometric and Radiation Characterization of a New Double Stack Multileaf Collimator in a Low Field MR-Linac A Doemer*, C Glide-Hurst , J Kim , N Wen , B Movsas , I Chetty , Henry Ford Health System, Detroit, MI
SU-F-KDBRA2-7	Secondary 3D Dose Verification for Online Adaptive Radiotherapy with MR-Linac G Chen*, J Zhang , X Li , Medical College of Wisconsin, Milwaukee, WI
SU-H330-GePD-F7-6	A Plan Quality Assurance Method for HDR Breast Brachytherapy with Multi-Lumen Balloon Applicator M Napiwocki1 , Y Le2*, (1) Purdue University, West Lafayette, Indiana, (2) Indiana University- School of Medicine, Indianapolis, IN
SU-H400-GePD-F4-4	The Total Energy in a Pencil-Beam-Scanning Plan as a Metric for Plan Quality R Slopsema*, S Flampouri , The university of Florida Health Proton Therapy Instit., Jacksonville, FL
SU-H400-GePD-F4-6	A Generalization of Gamma-Index-Analysis Methods to Evaluate the Agreement of Radiation Dose Distributions Varying by Three Or More Orders of Magnitude L Wilson*, W Newhauser , Louisiana State University, Baton Rouge, LA
SU-H430-GePD-F4-2	A Novel Mutual Information-Based Algorithm for IMRT/VMAT Quality Assurance B Ebrahimi*, R Rahimi Darabad , K Padgett , N Dogan , University of Miami, Miami, FL
SU-H430-GePD-F4-6	Multi-Institutional Analysis of Elekta Linear Accelerators Performance Using High-Resolution Log Files C Kabat1*, D Defoor2 , P Myers3 , N Papanikolaou1 , S Stathakis1 , (1) UT Health San Antonio, Texas, (2) Texas Oncology - Longview, Texas, (3) Baylor College of Medicine, Houston, TX
SU-I-GPD-P-24	Monitoring Electron Beam Energy Constancy Using a 2D Ionization Chamber Array with Double-Wedge Phantom S Gao*, M Chetvertkov , P Balter , M.D. Anderson Caner Center, Houston, TX
SU-I-GPD-P-42	Acceptance and Verification of Halcyon Linear Accelerators Without the Need for 3D Water Scanning System S Gao1*, P Balter2 , T Netherton3 , J Shi4 , M Rose5 , W Simon6 , (1) MD Anderson Cancer Ctr., Houston, TX, (2) UT MD Anderson Cancer Center, Houston, TX, (3) MD Anderson Cancer Center, Houston, TX, (4) Sun Nuclear Corp, Melbourne, FL, (5) Sun Nuclear Inc., Melbourne, FL, (6) Sun Nuclear Corp, Melbourne, FL
SU-I-GPD-P-52	Calibration of 192Ir High Dose Rate Brachytherapysource Using Water Phantom L Yu , B Yang , x liu , T Pang , N Liu , b Li , t Dong , B Wang , z wang , J Qiu*, Peking Union Medical college Hospital, Beijing, China
SU-I-GPD-T-2	Surface Applicator-Based Electronic Brachytherapy Commissioning with a Focus On Individual Source Derived Performance Expectations T Denton1,2, (1) Associates in Medical Physics, LLC, Greenbelt, MD (2) The Norton Cancer Institute Radiation Center, Louisville, KY
SU-I-GPD-T-4	Quantitative HDR Afterloader Source Position QA Using Two MicroDiamond Detectors T Harris1*, R Cormack2 , I Buzurovic3 , D O'Farrell4 , J Bredfeldt5 , M Bhagwat6 , (1) Brigham & Women's Hospital, Boston, MA, (2) Brigham and Women's Hospital, Boston, MA, (3) Brigham & Women's Hospital, Harvard Medical School, Boston, MA, (4) Dana Farber Cancer Institute, Boston, MA, (5) Brigham and Women's Hospital, Boston, MA, (6) Dana Farber/Brigham and Women's Hospital, Boston, MA
SU-I-GPD-T-17	Dosimetric Study of Sr-90 Beta Emitter Used in Small Animal Irradiation Studies G Narayanasamy1*, S sina2 , R Safari2 , K Krager3 , N Aykin-Burns3 , S Morrill1 , A Meigooni4 , (1) Department of Radiation oncology, University of Arkansas for Medical Sciences, Little Rock, AR, (2) School of Mechanical Eng. Shiraz University, Shiraz, Iran, (3) College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR, (4) Comprehensive Cancer Center of Nevada, Las Vegas, NV
SU-I-GPD-T-20	Filmless Method for HDR Brachytherapy Applicator Commissioning and Quality Assurance (QA) Using Fluoroscopic Images H Kang*, R Patel , M Mysz , J Roeske , Loyola university Medical Center, Maywood, IL
SU-I-GPD-T-47	Novel Amorphous Silicon Detector Array for Linear Accelerator Electron Measurements M Shaikh1*, J Burmeister2 , (1) Rochester General Hospital, Rochester, NY, (2) Wayne State university School of Medicine, Detroit, MI
SU-I-GPD-T-109	A Pilot Study of IROC's Proton Head & Neck Phantom P Taylor*, D Branco , N Hernandez , D Followill , UT MD Anderson Cancer Center, Houston, TX
SU-I-GPD-T-111	Utilization of Depth/planar Multi-Element Detection Arrays for Routine-Beamline and Patient-Specific Quality Assurance Programs of Proton Pencil-Beam-Scanning Beam W Hsi*, S Rana , L Coutinho , V Chirinos , M Leyva , J Bennouna , Miami Cancer Institute, Miami, FL
SU-I-GPD-T-112	Machine Log File Analysis for Quality Assurance of Proton Pencil Beam Scanning System R Zhang1*, B Clasie2 , N Depauw3 , Y Lin4 , T Shen5 , J Flanz6 , H Lu7 , K Jee8 , (1) Massachusetts General Hospital, Quincy, MA, (2) Massachusetts General Hospital, Boston, MA, (3) Massachusetts General Hospital, Boston, MA, (4) Duke University Medical Center, Durham, NC, (5) Massachusetts General Hospital, Boston, Massachusetts, (6) Massachusetts General Hospital, Boston, MA, (7) Massachusetts General Hospital, Boston, MA, (8) Massachusetts General Hospital, Boston, MA
SU-I-GPD-T-114	Quality Management for Proton Stereotactic Radiosurgery Based On TG 100 N Wang*, A Ghebremedhin , A Wroe , B Patyal , J Slater , Loma Linda university Medical Center, Loma Linda, CA
SU-I-GPD-T-127	Smearing Parameter for Smooth Compensator in Passive Scattering Proton Therapy F Poenisch*, P Roemhild , N Sahoo , M Gillin , X Zhu , MD Anderson Cancer Center, Houston, TX
SU-I-GPD-T-130	Proton Beam Stability of ProteusPLUS PBS Proton System: Our Initial Clinical Experience S Rana*, L Coutinho , A Gutierrez , J Bennouna , M Leyva , V Chirinos , W Hsi , Miami Cancer Institute, Miami, FL
SU-I-GPD-T-134	Feasibility Study to Evaluate Highly Weighted Spot Position and MU Accuracy Effect for Intensity-Modulated Proton Therapy L Zhao*, F Pirlepesov , O Ates , W Myers , M Axente , J Faught , Y Yan , I Igrutinovic , T Merchant , St. Jude Children's Research Hospital, Memphis, TN
SU-I-GPD-T-154	VMAT Commissioning and Patient-Specific QA Using MatriXX Phantom A Bao*, P Geis , Y Zheng , G Pereira , N Kuc Petchler , J Elconin , M Machtay , University Hospitals Cleveland Medical Center, Cleveland, OH
SU-I-GPD-T-158	A Correction of the Gamma Test for Monte Carlo Dose Distributions Comparison M Cohilis*, E Sterpin , J Lee , K Souris , Universite Catholique de Louvain, Woluwe, Brussels
SU-I-GPD-T-168	Initial Experience of Per Fraction Software in a Community Setting A Gonzalez*, University Hospitals Case Medical Center, Elyria, OH
SU-I-GPD-T-175	3D DVH Based Patient Specific Quality Assurance Using COMPASS S Chander*, S SHARMA , V SUBRAMANI , P KUMAR , S BHASKAR , S PATHY , N GOPISHANKAR , S THULKAR , M SINGH , A BINJOLA , P KUMAR , N DHAYANETHI , All India Institute of Medical Sciences, New Delhi, Delhi
SU-I-GPD-T-176	Correlation Between 2D-Gamma Index Passing Rate and 3D-DVH Based Patient Specific Quality Assurance S SHARMA*, S Chander , V SUBRAMANI , P KUMAR , N GOPISHANKAR , S BHASKAR , S PATHY , S THULKAR , R Kumar , M SINGH , A BINJOLA , P KUMAR , N DHAYANETHI , All India Institute of Medical Sciences, New Delhi, Delhi
SU-I-GPD-T-178	Effect of Detector Offset and Automatic Offset Correction On Portal Dosimetry for IMRT QA S Ferguson*, H Jin , S Ahmad , Oklahoma university Health Science Ctr., Oklahoma City, OK
SU-I-GPD-T-179	Development of An In-House Gamma Analysis Software for TomoTherapy Patient-Specific Quality Assurance (QA) J Kim1*, K Park2 , J Kim2 , H Lee2 , (1) Yonsei Caner Center, Seoul,(2) Yonsei University College of Medicine
SU-I-GPD-T-181	Clinical Comparison of Gafchromic EBT-XD Film to Gafchromic EBT3 Film When Utilized as An Absolute Dose Verification Method in Stereotactic Radiotherapy R Goodman MS*, T Murphy , D Siergiej PhD , T Schroeder MD, University of New Mexico, Albuquerque, NM
SU-I-GPD-T-182	Modifying Portal Dosimetry Models to Match Portal Imager Response Improves Results for IMRT QA R Lalonde1*, M Huq1,2 , D Heron1,2 , (1) UPMC Hillman Cancer Center, Pittsburgh, PA, (2) University of Pittsburgh Cancer Institute, Pittsburgh, PA
SU-I-GPD-T-184	Prediction of IMRT/VMAT Quality Assurance Gamma Analysis Passing Rates Using Convolutional Neural Networks B Ziemer1*, Y Iterian2 , T Solberg1 , G Valdes1 , (1) University of California San Francisco, San Francisco, CA, (2) University of San Francisco, San Francisco, CA
SU-I-GPD-T-185	Impact On Skin Dose Due to Weight Loss for Head & Neck Cancer Treated Using Volumetric Arc Therapy (VMAT) : A Phantom Study R Badkul*, J Edds , C Lominska , University of Kansas Medical Center, Kansas City, KS
SU-I-GPD-T-186	Verification of Volumetric Modulated Arc Therapy Total Marrow Irradiation Using ArcCHECK and EBT3 Films P Changkaew*, P Tangboonduangjit , N Stansook , R Worawongsakul , Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Rajathevi,, Bangkok
SU-I-GPD-T-188	Predictive Gamma Passing Rate Based On Dose Uncertainty for Head-And-Neck and Prostate IMRT E Shiba1,2*, A Saito1 , M Tsuneda1,3 , M Furumi2 , K Yahara2 , T Ohguri2 , Y Murakami1 , T Nishio3 , Y Korogi2 , Y Nagata1 , (1) Hiroshima University, Hiroshima, Japan, (2) Hospital of the University of Occupational and Environmental Health, Fukuoka, Japan, (3) Tokyo Women's Medical University, Tokyo, Japan
SU-I-GPD-T-189	A Novel Prediction of MLC Leaf Positioning Accuracy Based On Artificial Neural Network B Min1*, H Nam1 , W Cheon2 , Y Han2 , H Lee1 , Y Kim1 , I Jeong1 , S Bang1 , J Park1 , (1) Department of Radiation Oncology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul (2) Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul
SU-I-GPD-T-190	Dose Calculation Grid for 3D Dose Verification of VMAT Using Rotating 2D Array of Finite-Size Detectors A Saito*, T Nakashima, T Okumura, M Aita, K Hioki, D Kawahara, H Masuda, K Miki, M Mori, K Naito, Y Ochi, K Tsubouchi, Y Ohno, Y Nagata, Hiroshima University Hospital, Hiroshima, Japan
SU-I-GPD-T-191	How Flexible Is the Pass/fail Limits of the Gamma Index for Plan QA? A 10-Year Single Institution Experience S Almohsen1*, S Wadi-Ramahi1 , A Nobeh1 , B Moftah1 , (1) King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
SU-I-GPD-T-194	Impact of Different Treatment Planning Systems On Modulation Complexity for Prostate Volumetric Modulated Arc Therapy M Itano1*, K Motegi2 , S Kanai3 , S Shirasaki4 , H Tachibana5 , (1) ,,,(2) National Cancer Center, Kashiwa, Chiba, (3) Funabashi Municipal Medical Center, Funabashi, Chiba, (4) Funabashi Municipal Medical Center, Funabashi, Chiba, (5) National Cancer Center Hospital East, Kashiwa,
SU-I-GPD-T-196	Photon Beam Energy Dependence On IMRT QA for Brain Treatment Plan in Radiotherapy I Khan1 , B Tahir1 , M Rafique1 , T Iqbal1 , A Zahoor1,2 , J Rehman3 , K Iqbal2 , J Chow4*, (1) University of Gujarat, Gujrat, Pakistan, (2) SKMH&RC, Lahore, Pakistan, (3) BUITEMS, Quetta, Pakistan, (4) Princess Margaret Cancer Centre, Toronto, ON
SU-I-GPD-T-198	The Analysis of Dose Verification Results for 924 IMRT Plans S Wu*, J Chen , Z Li , C Li , Y Yin , Shandong Cancer Hospital to Shandong University, Shandong Academy of Medica, Jinan City, shandong provice
SU-I-GPD-T-199	A Comparative Study of Head & Neck VMAT QA Using ArcCheck and MapPhan Diode Detector Array Systems J Zhang*, J Rahimian , S Lee , W Lien , J Han , D Kim , K Goldman , S Lu , G Hong , Y Qian , Southern California Permanente Medical Group, Los Angeles, CA
SU-I-GPD-T-200	Investigating Causes to Unexplained Failures in IMRT QA A Uejo*, J Gagneur , E Clouser , Mayo Clinic Arizona, Phoenix, AZ
SU-I-GPD-T-241	Dose-Volume Evaluation On Calculation Grid Size in Prostate VMAT Using the Gaussian Error Function J Chow1*, R Jiang2 , D Markel1 , (1) Princess Margaret Cancer Centre, Toronto, ON, (2) Grand River Regional Cancer Centre, Kitchener, ON
SU-I-GPD-T-256	Standardization of Sampling Radius Size for Treatment Planning Secondary Dose Calculation T Cui*, Z Ouyang , S Kost , L Qiu , M Sands , K Verdecchia , J Donaghue , P Xia , The Cleveland Clinic Foundation, Cleveland, OH
SU-I-GPD-T-302	External Photon Beam Dosimetry for Linac QA Using Gafchromic EBT3 Film I Khan1 , B Tahir1 , M Rafique1 , T Iqbal1 , S Zulfiqar1,2 , A Zahoor1,2 , J Rehman3 , K Iqbal2 , J Chow4*, (1) University of Gujarat, Gujrat, Pakistan, (2) SKMH&RC, Lahore, Pakistan, (3) BUITEMS, Quetta, Pakistan, (4) Princess Margaret Cancer Centre, Toronto, ON
SU-I-GPD-T-306	Inactivation of the Transverse Beam Steering Servo System and the Effect of Linac's Operating Dose Rates On X-Ray Beam's Center and Profile Characteristics E Sham*, B Kassahun, Gibson Cancer Center (Duke Cancer Network), Lumberton, NC
SU-I-GPD-T-307	RadCalc for Independent Dosimetric Validation of Plans Generated in Accuray Precision Treatment Planning System T Romaguera*, D Alvarez , S George , V Mishra , A Gutierrez , Miami Cancer Institute, Miami, FL
SU-I-GPD-T-313	Predicting Photon Dosimetry of EBT3 Gafchromic Films to Improve Accurate Dosimetry Using Machine Learning Method YU-SHEN Lin*, E-DA hospital, Kaohsiung, Taiwan (R.O.C.)
SU-I-GPD-T-317	Evaluation of TrueBeam Machine Performance Check for Daily Output Constancy and KV Imaging Offset Checks X Liang1*, Z Li1 , (1) University of Florida, Jacksonville, FL
SU-I-GPD-T-318	Routine Jaw Positioning QA for Analyzing Photon Junctions Using Half Beam Block Matching K Harpool1,2*, S Crawford1,2 , W Snyder1,2 , P Schantz1,2 , J Dick1,2 , J Wei1,2 (1) Cancer Treatment Centers of America, Newnan, GA, (2) Landauer Medical Physics, LLC, Glenwood, IL
SU-I-GPD-T-319	Sensitivity Testing of Quality Assurance (QA) Tasks in Sun Nuclear Corporation (SNC) Machine - A Fully Automated TG-142 QA Solution G Martin*, A Willet , M Gilmore , L Howard , S Elmer , R Clements , R Biggar , C Rowbottom , The Clatterbridge Cancer Centre, Birkenhead, Wirral, UK
SU-I-GPD-T-323	When a Good Monitor Chamber Goes Bad: Diagnosing Atmospheric Communication of a Sealed Monitor Chamber T McCaw*, B Barraclough , M Belanger , A Besemer , D Dunkerley , Z Labby , University of Wisconsin, Madison, WI
SU-I-GPD-T-324	Credentialing Process for Randomized Photon Versus Proton NCI Sponsored Trials H Mehrens*, N Hernandez , T Nguyen , B Lewis , N Pajot , A Molineu , P Taylor , D Followill , UT MD Anderson Cancer Center, Houston, TX
SU-I-GPD-T-329	Photon Beam Quality Assurance with the Integral Quality Monitor System: A Multicenter Study A Veres1*, M Farrokhish2 , J DeMarco3 , L Fong de los Santos1 , R Heaton2 , M Islam2 , (1) Mayo Clinic, Rochester, MN, (2) Princess Margaret Cancer Centre, Toronto, Ontario, (3) Cedars-Sinai Medical Center, Los Angeles, CA,
SU-I-GPD-T-330	A Simplified Commissioning Procedure for the Halcyon Linear Accelerator S AM Lloyd*, T Lim , X Fave , E Flores-Martinez , V Moiseenko , K L Moore , T F Atwood , UC San Diego, La Jolla, CA
SU-K-KDBRA1-1	A Novel Learning Approach for Predicting MLC Positioning During Dynamic IMRT Delivery A Osman1*, N Maalej2 , K Jayesh3 , (1) American University of Beirut Medical Center, Beirut, Lebanon,(2) King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia,(3) American Hospital Dubai, Dubai, UAE
SU-K-KDBRA1-6	Robust Quality Assurance (QA) Method Using a Single Phantom to Determine Radiation and Imaging Isocenters H Kang*, R Patel , J Roeske , Loyola university Medical Center, Maywood, IL
SU-K-KDBRB1-1	Novel Phantom Validation of Susceptibility-Related Distortions S P. Nejad-Davarani1*, J Cunningham1,2 , C Glide-Hurst1,2 (1) Henry Ford Health System, Detroit, MI, (2) Wayne State University, Detroit, MI
SU-L-209-6	VMAT Plans Are Superior to Step-And-Shoot IMRT for Single Fraction Spine SBRT Based On Dosimetric and Quality Assurance Comparison Z Ouyang*, D LaHurd, E Balagamwala, S Chao, P Xia, Department of Radiation Oncology, Cleveland Clinic, Cleveland, OH
SU-L-DBRA-5	Hazard Analysis of the Halcyon Linac and Treatment Planning System T Pawlicki*, G Kim, UC San Diego, La Jolla, CA
SU-L-KDBRA1-1	A Machine Learning-Based Approach to Specify the Cause of Error in IMRT Patient Specific QA S Utsunomiya1*, M Sakai1 , H Koarai1 , T Takizawa2 , N Kushima2 , S Tanabe2 , H Aoyama3 , (1) Graduate School of Health Sciences, Niigata University, Niigata, Japan, (2) Niigata University Medical and Dental Hospital, Niigata, Japan, (3) Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
SU-L-KDBRA1-7	Risk Assessment for the Acceptance and Commissioning Process of a New Ring-Gantry Linear Accelerator P Teo*, P Kosterin , M Hwang , S Jang , W Shields , R Lalonde , M Huq , University of Pittsburgh Cancer Institute, Pittsburgh, PA
SU-L-KDBRB1-4	Evaluation of a Novel Pelvic End-To-End (PETE) Phantom in MR-Only and MR-IGRT Workflows J Cunningham1,2*, E Barberi3 , K Penev3,4 , J Miller3 , C Glide-Hurst1,2 , (1) Wayne State University, Detroit, MI, (2) Henry Ford Cancer Institute, Detroit, MI, (3) Modus Medical Devices Inc., London, ON, (4) University of Western Ontario, London, ON
TH-AB-DBRA-8	Linac Triggering Latency Quantification for Consideration in Intra-Fraction Motion Management Systems A Shepard*, C Matrosic , S Jupitz , J Radtke , W Culberson , B Bednarz , University of Wisconsin-Madison, Madison, WI
TH-AB-KDBRA1-2	A Method for Failure Prediction and Preventative Maintenance of Multi-Leaf Collimators Via Log Files D Moyer*, E Wolf , N Kumar , B McGill , M Lamba , D Ionascu , University of Cincinnati, Cincinnati, OH
TH-AB-KDBRB1-9	Using Machine Learning to Develop a Novel Error Detection Algorithm for HDR Brachytherapy D Sterling*, E Ehler , University of Minnesota, Minneapolis, MN
TH-CD-DBRA-7	Evaluation Criteria for IROC's Proton Prostate Phantom P Taylor*, H Mehrens , P Alvarez , D Followill , UT MD Anderson Cancer Center, Houston, TX
TU-C1000-GePD-F2-4	Assessment of Gradient Nonlinearity Distortions in a Low-Field MR-Linac Using a Modular Large Field of View Phantom S P. Nejad-Davarani1*, E Barberi2 , M Cole2 , C Glide-Hurst1 , (1) Henry Ford Cancer Institute, Detroit, MI, (2) Modus Medical Devices Inc., London, Ontario
TU-C1000-GePD-F4-2	Implementation of An Efficient Spot Scanning Proton System QA Utilizing a Conical Scintillator Phantom J Faught*, O Ates , L Zhao , St. Jude Children's Research Hospital, Memphis, TN
TU-C1030-GePD-F4-4	Initial Investigation of the SX1 Dual-Layer Multileaf Collimator Tongue-And-Groove Effect TY Lim*, E Flores-Martinez , X Fave , S AM Lloyd , I Dragojevic , D Hoffman , T Atwood , K L Moore , G Kim , UC San Diego, La Jolla, CA
TU-C1030-GePD-F7-5	Plan Deliverability Assessment and Prediction Using VMAT Delivery Emulator S Balakuntala1 , D Tewatia2 , J Dubicki3 , A Abdellatif4 , R Tolakanahalli5*, (1) PSG College of Techology, Coimbatore, Tamil Nadu, (2) University of Wisconsin Madison, Madison, WI, (3) Hamilton Health Sciences, St. Catharines, ON, (4) Hamilton Health Sciences, St. Catharines, ON, (5) Walker Family Cancer Centre, St. Catharines, ON
TU-C930-GePD-F3-4	Using a QA Test System to Determine Mechanical Tolerance Limits of Linacs for Highly Complex Treatment Plans J Stroom*, A Taborda , S Vieira , C Greco , Champalimaud Centre for the Unknown, Lisbon, Lisbon
TU-C930-GePD-F3-5	A Deep Learning-Based Prediction Model for Gamma Evaluation in Patient-Specific Quality Assurance S Tomori1,2*, N Kadoya2 , Y Takayama2 , T Kajikawa2 , K Shima1 , K Narazaki1 , K Jingu2 , (1) National Hospital Organization Sendai Medical Center, Sendai, Japan(2) Tohoku University, Sendal, Japan
TU-D-KDBRB1-3	Comparison of Acoustic Detection Methods for Proton Range Verification W Nie1*, K Jones2 , A Lieth3 , T TeBeest3 , J Foley3 , A Kassaee1 , C Sehgal4 , S Avery1 , (1) Department of Radiation Oncology, University of Pennsylvania, Philadelphia, PA, (2) Department of Radiation Oncology, Rush University Medical Center, Chicago, IL, (3) Polytec Inc., Dexter, MI,(4) Department of Radiology, University of Pennsylvania, Philadelphia, PA
TU-E115-GePD-F7-1	Commissioning of a Pre-Configured Fast-Rotating O-Ring Gantry Linac System and IMRT/VMAT Treatment Delivery Quality R De Roover1*, K Poels2 , W Crijns2 , A Nulens2 , B Vanstraelen2 , K Haustermans1,2 , T Depuydt1,2 , (1) KU Leuven - University of Leuven, Department of Oncology, B-3000 Leuven, Belgium, (2) University Hospitals Leuven, Department of Radiation Oncology, B-3000 Leuven, Belgium
TU-E115-GePD-F7-2	Dose Perturbations From Esophageal Stents in Volumetric Modulated Arc Therapy R Kosztyla1*, C Duzenli1 , B Nasir2 , S Lefresne1 , (1) BC Cancer - Vancouver, Vancouver, BC, (2) Centre Hospitalier de l'Universite de Montreal, Montreal, QC
TU-I345-GePD-F3-2	Feasibility Study of the Image-Based Automatic QA for the Halcyon G Kim1*, J Rah2 , T Lim1 , E Flores-Martinez1 , T Pawlicki1 , (1) University of California, San Diego, La Jolla, CA, (2) Myungji Hospital, Goyang-si, Gyeonggi-do, Republic of Korea
TU-K-DBRA-3	Development of An Independent Peer Review System for a Small Animal Irradiator M Peters*, R Howell , R Tailor , S Smith , S Kry , J Niedzielski , D Followill , D Craft , T Fujimoto , C Taniguchi , S Krishnan , MD Anderson Cancer Ctr., Houston, TX
TU-K-KDBRC-7	Using Dual Step Wedge and 2D Scintillator to Achieve Highly Precise and Robust Proton Range Quality Assurance W Deng*, W Liu , D Robertson , M Bues , T Sio , S Keole , J Shen , Mayo Clinic Arizona, Phoenix, AZ
WE-AB-DBRA-2	A Novel Source Tracking Method for Accurate and Comprehensive HDR Brachytherapy Quality Assurance Using Radiochromic Film Dosimetry S Aldelaijan1,2,3,4*, P Papaconstadopoulos2,3 , H Bekerat3 , J Schneider2,3 , J Seuntjens2,5 , I Buzurovic6 , S Devic2,3 , (1) Department of Biomedical Engineering, Montreal Neurological Institute, Montreal, Canada, (2) Medical Physics Unit, McGill University, Montreal, Canada, (3) Department of Radiation Oncology, Jewish General Hospital, Montreal, Canada, (4) Biomedical Physics Department, King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia, (5) Department of Oncology, McGill University, Montreal, Canada (6) Department of Radiation Oncology, Dana-Farber/Brigham & Women's Cancer Center, Harvard Medical School, Boston, USA
WE-AB-DBRA-8	Microresolution Dosimetry System for Patient Specific Quality Assurance of Ocular Melanoma Eye Plaque Based Treatments S Pokhrel1*, A Wiles1 , T Knewtson1 ,Y Feng 1,2, M Ballo1,2 , E W Izaguirre1,2 , (1) university Tennessee Health Science Center,Methodist university Hospital, Memphis, TN., (2)West Cancer Center, Germantown, TN.
WE-C1000-GePD-F3-2	Novel, EPID-Based Quality Assurance Framework for a Small Animal Image-Guided Radiotherapy System A Anvari*, Y Poirier , A Sawant , University of Maryland School of Medicine, Baltimore, MD
WE-C1000-GePD-F4-4	Validation of Acuros-Based Dose Distributions for Varian HDR Surface Applicator Set with Leipzig-Style Cones R Hunt*, D Cheek , J Molloy , D Pokhrel , University of Kentucky, Lexington, KY
WE-C1000-GePD-F4-6	Determination of Source Positions in HDR Applicators for Commissioning/QA Using An Image Plate Device, Raven QA I Bernstein*, B Yi , university of Maryland School Of Medicine, Baltimore, MD
WE-C1000-GePD-F9-2	Development of a Robust Linac QA Program for Multiple Beam Matched and Dosimetrically Equivalent TrueBeams N Gupta*, A Ayan , D DiCostanzo , M Carlson , J Woollard , Ohio State University Medical Center, Columbus, OH
WE-C930-GePD-F4-1	A Study On Gantry Position Accuracy Using Delivered Dose Distributions for Gated Volumetric Modulated Arc Therapy P Ravindran1*, T Balasingh1 , J Raj1 , W Woon2 , (1) Christian Medical College Hospital, Vellore, (2)The Brunei Cancer Center, Brunei, Brunei Darusalam
WE-C930-GePD-F6-5	An Open-Source Image Quality Assurance Software for Matlab/Octave M Bedre*, A Alexandrian , N Papanikolaou , S Stathakis , A Sampson , K Rasmussen , D Saenz , N Kirby , Ut Health San Antonio, San Antonio, TX
WE-C930-GePD-F7-3	Development of Novel Heterogeneous Anthropomorphic Head and Neck Phantom Using 3D Printer for IMRT Patient Specific Quality Assurance N Kadoya1*, K Abe1 , H Nemoto1 , K Sato2 , Y Ieko1 , K Ito1 , Y Takayama1 , T chiba1 , S Dobashi1 , K Takeda1 , K Jingu1 , (2) Tohoku University Graduate School of Medicine, Sendai, Japan,(2) Tohoku University Hospital, Sendai, Japan
WE-C930-GePD-F9-3	The Effect of Jaw Hysteresis On Half-Beam Fields G Johnson*, E Marshall , Northwest Medical Physics Center, Lynnwood, WA
WE-C930-GePD-F9-5	Characterizing Isocenter Reproducibility for Linac-Based Stereotactic Treatment Accuracy D Pinkham1*, S Hancock2 , (1) Yale New Haven Hospital, New Haven, CT, (2) Southeast Missouri Hospital, Cape Girardeau, MO
WE-FG-DBRA-11	Knowledge-Based Treatment Planning Increases Complexity and Reduces Delivery Accuracy of VMAT Plans for Prostate Cancer P Wall1*, J Fontenot1,2 , (1) Louisiana State University, Baton Rouge, LA, (2) Mary Bird Perkins Cancer Center, Baton Rouge, LA
WE-FG-KDBRA1-8	Independent Recalculation Outperforms Traditional Measurement-Based IMRT QA Methods in Detecting Unacceptable Plans S Kry*, M Glenn , D Branco , H Mehrens , A Steinmann , C Peterson , D Followill , MD Anderson Cancer Ctr., Houston, TX
WE-FG-KDBRA1-10	Utilizing Historical Performance Data From Trajectory Logs and Service Reports to Establish a Proactive Maintenance Model for Minimizing MLC Downtime B Wu*, P Zhang , T LoSasso , Memorial Sloan-Kettering Cancer Center, New York, NY
WE-FG-KDBRB1-1	Strategies to Mitigate Gantry Angle Specific Inhomogeneities in a Low-Field MR-Linac C Glide-Hurst1*, S P. Nejad-Davarani1 , J Kenney2 , D Du1 , J Kim1 , I Chetty1 , (1) Henry Ford Cancer Institute, Detroit, MI (2) ViewRay, Oakwood Village, OH
WE-FG-KDBRB1-11	Characterization of Ferromagnetic Influence of a MR-Guided Radiotherapy (MRgRT) System and Vault: Cobalt to Linac K Mittauer1*, P Yadav1 , S McMain2 , B Paliwal1 , J Bayouth1 , (1) University of Wisconsin-Madison, Madison, WI, (2) ViewRay Inc, Oakwood Village, OH