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Taxonomy: TH- External beam- photons: extracranial stereotactic/SBRT

MO-I345-GePD-F4-1	Improving Treatment Efficiency Using Photon Optimizer MLC Algorithm for Single-Isocenter/Multiple-Lesions VMAT Lung SBRT L Sanford*, J Molloy , M Bernard , M Randall , R McGarry , D Pokhrel , University of Kentucky, Lexington, KY
PO-GePV-T-226	Assessment of Dosimetric Perturbation Due to Patient Movement During Lung SBRT Using Flattening-Filter Free Beams (FFFB) Or Flattened Beams (FB) K Xu*, T Biswas , Y Zhang , Y Zheng , T Baig , M Machtay , T Podder , University Hospitals Seidman Cancer Center, Cleveland, OH
PO-GePV-T-292	Expanding Access to Radiotherapy for Low Resource Countries Using Stereotactic Body Radiation Therapy J Chin1*, O Irabor2 , W Ngwa1,2 , (1) University of Massachusetts Lowell, Lowell, MA (2) Dana Farber Cancer Institute, Harvard Medical School, Boston, MA
PO-GePV-T-350	Utilization of Non-Coplanar Dynamic Conformal Arcs to Improve Normal Tissue Toxicity Risk in Lung SBRT L Ku*, B. Casto, D. L. Rupp, N. Fitzpatrick, M. Smith, J. Ying, W. W. Chance, S. J. Wang, Salem Hospital, Salem, OR
PO-GePV-T-355	An Autonomous SBRT Treatment Planning Approach for Patients with Multiple Targets T Wu*, E Pearson , B Aydogan , The University of Chicago, Chicago, IL
PO-GePV-T-357	Early Clinical Experience with Halcyon Version 2 for SBRT Lung Treatments Z Shen1*, P Ramesh1 , F Li1 , R Lalonde1 , D Heron1 , M Huq1 , (1) UPMC Hillman Cancer Center and University of Pittsburgh School of Medicine, Pittsburgh, PA
PO-GePV-T-371	Improving the Plan Quality and Treatment Efficiency Via Flattening Filter Free (FFF) Beams for Single-Isocenter/multiple-Lesions VMAT Lung SBRT L Sanford*, J Molloy , M Bernard , M Randall , R McGarry , D Pokhrel , University of Kentucky, Lexington, KY
PO-GePV-T-373	Ablative Heterogeneous Dosing Scheme for Locally Advanced Pancreatic Cancer (LAPC) Via Daily CBCT-Guided DIBH D Pokhrel*, L Sanford , J Molloy , M Bernard , University of Kentucky, Lexington, KY
PO-GePV-T-374	Positioning Accuracy for SBRT Lung Patients Determined by Post-Treatment Cone-Beam CT Imaging T Reynolds1 , M Ozer1*, (1) MN Oncology, St Paul, MN
SU-F-SAN4-8	Clinical Evaluation of Lung SBRT for the Halcyon Platform and Dosimetric Comparison with the Truebeam STx and Millennium MLC Systems C Kennedy*, R Scheuermann , D Mihailidis , University of Pennsylvania, Philadelphia, PA
SU-I330-GePD-F7-5	Robust Optimization Strategies for Lung SBRT T McCaw*, University of Wisconsin-Madison, Madison, WI
SU-I330-GePD-F7-6	SBRT Optimization Using NTCP Objectives Regarding Carotid Blowout Syndrome Z Karakas1*, E Schreiber2 , J Grimm3 , M Cengiz4 , G Yazici5 , G Ozyigit6 , S Stathakis7 , N Papanikolaou8 , S Das9 , P Mavroidis10 , (1) University of North Carolina, Chapel Hill, NC, (2) Univ North Carolina, Chapel Hill, NC, (3) Johns Hopkins University, Baltimore, MD, (4) ,Ankara, ,(5) ,Ankara, ,(6) ,Ankara, ,(7) University Of Texas Health, San Antonio, TX, (8) University of Texas HSC SA, San Antonio, TX, (9) Univ North Carolina, Chapel Hill, NC, (10) Univ North Carolina, Chapel Hill, NC
SU-L-302-1	A Simple, Yet Novel Hybrid-Dynamic Conformal Arc (h-DAC) Therapy Planning Via FFF-Beam for Stereotactic Body Radiosurgery (SBRS) of Lung Lesion M Halfman*, L Sanford , J Molloy , D Pokhrel , University of Kentucky, Lexington, KY
TH-B-SAN4-0	Immunotherapy Killed the IGRT Star H Al-Hallaq*, S Chmura*, The University of Chicago, Chicago, IL
TH-BC-225BCD-6	Focal Liver Reaction Threshold Dose in Liver Stereotactic Body Radiation Therapy (SBRT): Does Inter-Fractional Variability Matter? S Kuznetsova1*, P Grendarova2 , S Roy3 ,R Sinha2 , N Ploquin1,4 , K Thind1,4 , (1)Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada (2) Department of Oncology, Division of Radiation Oncology, Tom Baker Cancer Center, Calgary, AB, Canada (3) Department of Radiation Oncology, The Ottawa Hospital Cancer Program, University of Ottawa, Ottawa,Ontario, Canada (4) Department of Oncology, Division of Medical Physics, Tom Baker Cancer Centre, Calgary, AB, Canada
TU-C1030-GePD-F3-3	Initial Clinical Experience with Using Calypso Anchored Beacons for Tumor Tracking in Lung SBRT V Sarkar*, M Szegedi , A Paxton , G Nelson , P Rassiah-Szegedi , C Reddy , R Tao , Y Hitchcock , K Kokeny , B Salter , University of Utah, Salt Lake City, UT
TU-C1030-GePD-F5-5	Verification of Target Volume Margin of Visual-Guided Breath-Hold Method in Stereotactic Body Radiotherapy for Liver Cancer M Cho1,2*, H Kim1 , S Yoon 1, J Jung1 , S Lee1, J Kwak1 , K Yoon1 , C Jeong1 , M Park1 , H Kim1 , S KIM1 , B Cho1,2 ,(1) Department of Radiation Oncology, Asan Medical Center, Seoul, (2) University of Ulsan, College of Medicine
TU-HI-SAN1-2	An Efficient Workflow for Generation and Refinement of a Knowledge Based Planning Model for Pancreas SBRT Using Automation T Patton1*, Q Diot1 , B Jones1 , L Olsen2 , Y Vinogradskiy1 , K Goodman1 , T Schefter1 , D Thomas1 , (1) University of Colorado School of Medicine, Aurora, CO, (2) Memorial Hospital, Colorado Springs, CO
TU-J345-GePD-F1-1	Evaluation of the Dosimetric Benefit of Using Cyberknife for Stereotactic Radiotherapy (SBRT) of Prostate Treatment L Wang*, S Hayes , E Horwitz , L Jin , C Ma , Fox Chase Cancer Center, Philadelphia, PA
TU-J345-GePD-F1-4	Investigation On Imaging Dose to Spinal Cord in Spine SBRT Treatment Y Xu1,2*, M Khosravi2 , Y Lyatskaya2 , P Zygmanski2 , F Hacker2 , J Bredfeldt2 , Y Hu2 , (1) Harvard Medical School (2) Brigham & Women's Hospital, Boston, MA
TU-J345-GePD-F7-1	Correlation of Lung SBRT Autoplans with Organ Dose Prediction Z Ouyang1*, T Zhuang1 , M Kolar1 , G Marwaha2 , G Videtic1 , K Stephans1 , P Xia1 , (1) Cleveland Clinic, Cleveland, OH, (2) Rush University, Chicago, IL
TU-K430-CAMPUS-F3-2	Clinical Validation of Photon Optimizer (PO) Algorithm Against Progressive Resolution Optimizer (PRO) in the Treatment of Single-Dose Lung SBRT J Visak*, J Molloy , M Randall , R McGarry , D Pokhrel , University of Kentucky, Lexington, KY
WE-C1000-GePD-F7-6	Characterization of Dynamic Conformal Arc Therapy Planning (DCAT) Optimized with Aperture Modulation for Breath-Hold Treatment During Stereotactic Ablative Radiotherapy S Lee*, D Waters , A Colonias , S Oh , M Tassotto , B Coopey , D Pavord , M Goss , V Verma , H Lee , M Chetvertkov , Y Liang , D Parda , J Sohn , Allegheny General Hospital, Pittsburgh, PA
WE-C930-GePD-F4-4	Modeling of Interplay Effect Due to Number of Parameters for Stereotactic Body Radiotherapy of Liver Cancer D Thaper1*, A Oinam2 , R Kamal1 , G Singh1 , V Kumar1 , HP yadav3 (1) Centre for Medical Physics, Panjab University, Chandigarh ,(2) Department of Radiotherapy. PGIMER, Chandigarh ,(3) Institute of Liver and Biliary Sciences, New Delhi
WE-HI-301-3	A Collimator Setting Optimization Algorithm for Dual-Arc Volumetric Modulated Arc Therapy in Pancreas Stereotactic Body Radiation Therapy X Li1*, Q Wu1 , M Palta1 , Y Zhang2 , Y Sheng1 , J Zhang1 , C Wang1 , (1) Duke University Medical Center, Durham, NC, (2) UT Southwestern Medical Ctr at Dallas, Dallas, TX