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

MO-E115-GePD-F4-2Feasibility of Online SRS with MRIdian: Dosimetric Comparison of MRIdian to TrueBeam with HDMLC
M Malin*, E Lobb , M Stevens , G Redler , K Yenice , B Aydogan , The University of Chicago Medical Center, Chicago, IL
MO-E115-GePD-F4-6Development of a Fine to Coarse MLC Conversion Tool: Dosimetric Impact of Transferring SRS Patients Mid-Treatment
A Hudson*, N Ploquin , K Thind , G Pierce , University of Calgary, Calgary, AB, Tom Baker Cancer Centre, Calgary, AB
MO-I345-GePD-F3-4Measurement of Output and Percent Depth Dose (PDD) for Small Stereotactic Radiosurgery (SRS) Cones Using Semiconductor and Microdiamond Detectors
E Lief1*, G Dawson2 , J Restrepo3 , G Beyer4 , P Jeffe5 , A Cheuk6 , (1) VA Medical Center, Pelham, NY, (2) J.J. Peters Bronx VA Medical Center, Bronx, NY, (3) J.J. Peters Bronx VA Medical Center, Bronx, NY, (4) Medical Physics Services, LLC, Miami, FL, (5) J.J. Peters Bronx VA Medical Center, Bronx, NY, (6) J.J. Peters Bronx VA Medical Center, Bronx, NY
SU-E-209-6HyperArc Stereotactic Radiosurgery (SRS) Planning for Challenging Multiple Brain Metastases Reduces Dose to Brain and Brainstem
Z Shen*, P Kosterin, R Lalonde, D Heron, M Huq, UPMC Hillman Cancer Center, University of Pittsburgh School of Medicine, Pittsburgh, PA
SU-E-209-7Investigation of Knowledge-Based Planning for Single Isocenter Multiple Targets Radiosurgery
Y Yang*, J Duan , Q Wu , D Yoo , J Kirkpatrick , F Yin , Duke University Medical Center, Durham, NC
SU-F-202-5Intracranial Tissue Visualization and Alignment Prior to Stereotactic Radiosurgery
Z Labby*, P Hill , D Jacqmin , B Barraclough , A Besemer , D Dunkerley , University of Wisconsin, Madison, WI
SU-H400-GePD-F4-5E2E Test of Automatic Plan Optimization Using RayStation Scripting for Hypo-Fractionated Multi-Metastatic Brain SRT
E Han1*, G Kim2 , X Wang3 , D Yeboa4 , H Lee5 , S Svensson6 , T Briere7 , (1) UT MD Anderson Cancer Center, Houston, TX, (2) University of California, San Diego, La Jolla, CA, (3) UT MD Anderson Cancer Center, Houston, TX, (4) University of Texas MD Anderson Cancer Center, Houston, Texas, (5) UT MD Anderson Cancer Center, Houston, TX, (6) RaySearch Laboratories, Stockholm, Sweden, (7) MD Anderson Cancer Ctr., Houston, TX
SU-H400-GePD-F5-2MV Portal Imaging Versus Optical Surface Imaging for Intra-Fraction Motion Detection in Intracranial Stereotactic Radiosurgery
R Sullivan*, E Covington , R Popple , The University of Alabama at Birmingham, Birmingham, AL
SU-H430-GePD-F7-6Variation in Normal Brain Sparing in Stereotactic Radiosurgery Plans Treating Multiple Targets Using Single-Isocenter Volumetric Modulated Arc Therapy
Y Cui*, H Gao , J Kirkpatrick , F Yin , Duke University Medical Center, Durham, NC
SU-I-GPD-P-29CyberKnife Experience: A Dose Gradient Index for Stereotactic Radiosurgery/Radiotherapy
T Reynolds1*, M Ozer1 , A Jensen1 , E Bellairs1 , L Nussbaum2 , (1) Minnesota Oncology, St Paul, MN, (2) Nasseff CyberKnife Center, United Hospital, St Paul, MN
SU-I-GPD-P-32Investigation of Cone Planning and Mask System in Intracranial SRS
Y Hu*, T Dou , D Cail , Z Han , P Zygmanski , F Hacker , Brigham & Women's Hospital, Boston, MA
SU-I-GPD-P-56Gradient Index as Quality Measure of Multi Lesion SRS VMAT Plans
L Kuo*, A Ballangrud , Memorial Sloan Kettering Cancer Center, New York, NY
SU-I-GPD-T-172Patient Specific VMAT QA for SRS with PerFraction
J Haywood1*, (1) Mercy Health Partners, Allendale, MI
SU-I-GPD-T-273Use Eclipse Treatment Planning System as Quality Assurance Tool to Verify Multiple-Metastases-Elements Treatment Plan
J Li*, Y Yu , H Liu , Thomas Jefferson University, Philadelphia, PA
SU-I-GPD-T-361Commissioning of Brainlab IPlan- and Elements-Based Stereotactic Radiosurgery Utilizing Both MLC and Aktina Cone Solutions On An Elekta Agility Platform
N Marsh*, M Maynard , J Dugas , G Schimke , H Wu , Willis-Knighton Medical Center, Shreveport, LA
SU-I-GPD-T-373Experimental Validation of SRS VMAT in Small Volumes. Tolerance Criteria for Plan-Specific QA Verification
M Adria-Mora1*, N Carrasco Vela1 , J Bonaque Alandi1 , F Ballester2,3 , J Gimeno Olmos1,3 , V Carmona Meseguer1,3 , F Lliso Valverde1,3 , J Perez-Calatayud1,3 , (1) Hospital Universitari i Politecnic La Fe, Valencia, Spain (2) University of Valencia, Burjassot, Spain (3) Grupo de Investigacion en Fisica Medica IRIMED, UV - Hospital La Fe, Valencia, Spain
SU-I-GPD-T-374End-To-End Testing of Linac-Based SRS Using Radiochromic Film & CIRS STEEV Phantom
R Ambrose*, J Presser , South Nassau Communities Hospital, Oceanside, NY
SU-I-GPD-T-375Quality Assurance Study of Stereotactic Radiosurgery of Multiple Brain Lesions with a Single Isocenter
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, California
SU-I-GPD-T-398Results of Beta Testing the New VMAT Module in Elements Cranial SRS Software for Radiosurgery Planning
A Bertinetti*, G Luo , G Ding , Vanderbilt University, Nashville, TN
SU-I-GPD-T-402Normal Brain Dose Sparing with Gamma Knife and Linac-Based Stereotactic Radiotherapy for Multiple Brain Metastases
J Carter*, I Vergalasova , X Wang , K Grantham , M Reviello , Y Zhang , J Weiner , N Yue , K Nie , Rutgers University, New Brunswick, NJ
SU-I-GPD-T-409Optimize the Selection of the Cone Size and the Prescription Isodose Line (IDL) in Linear Accelerator Based Stereotactic Radiosurgery (SRS) Planning
J Zhu*, Presence St. Joseph Medical Ctr., Joliet, IL
SU-I-GPD-T-413Validation of Single Isocenter Multi-Target SRS Planning Calculations and Early Clinical Experience
C Geraghty*, B Hasson , T Li , Anne Arundel Medical Center, Annapolis, MD
SU-I-GPD-T-436Dosimetric Verification for Ultra-Small Intracranial Target Radiation Treatment Using Linac-Based Dynamic Conformal Arc Therapy
Y Zheng*, Z Xu , D Mansur , M Machtay , G Pereira , University Hospitals Cleveland Medical Center, Cleveland, OH
SU-I-GPD-T-438Feasibility of SRS Delivery for Single Mets Using the VersaHD Linac
A Licon*, J Rembish , R Crownover , D Saenz , N Kirby , K Rasmussen , N Papanikolaou , S Stathakis , Ut Health San Antonio, San Antonio, TX
SU-L-DBRA-1Can Single Isocenter, Linac-Based Stereotactic Radiosurgery Rival Gamma Knife Plan Quality for Complex, Multiple-Target Cases?
J Burmeister1,2*, G Baran2 , J Rakowski1,2 , A Nalichowski1,2 , M Dominello1,2 , (1) Wayne State University School of Medicine, Detroit, MI, (2) Karmanos Cancer Institute, Detroit, MI
SU-L-DBRA-4Evaluation of Hyperarc SRS Planning for Linacs with Standard- and Micro-MLC: Comparison with Gamma Knife
E Bossart*, M Monterroso , N Elsayyad , E Mellon , N Dogan , University of Miami Miller School of Medicine, Department of Radiation Oncology, Miami, FL
SU-L-DBRA-6Linac/MLC-Based SRS for Trigeminal Neuralgia: Risk of Isocenter Positioning Uncertainties
J Molloy , M Sanders , D Pokhrel*, University of Kentucky, Lexington, KY
SU-L-DBRA-7Managing the Rotation Uncertainty in Single-Isocenter Multiple Target (SIMT) Linac SRS Treatment
Q Chen*, L Sanford, D Pokhrel, University of Kentucky, Lexington, KY
TH-AB-KDBRA1-5A Practical Device and Procedure for Measuring Vertical and Horizontal Treatment Couch Walkout Under Rotation
I Brezovich*, E Covington , X Wu , R Popple , S Shen , R Cardan , B Guthrie , J Fiveash , M Bredel , university Alabama Birmingham, Birmingham, AL
TU-D-KDBRA1-4Investigation of Off-Isocenter Field Misalignment in Single-Isocenter Multiple-Target VMAT SRS and Its Implication On CTV Margin
Y Song1*, C Velton2 , X Tang3 , Z Saleh4 , M Zhang5 , B Mueller6 , B Mychalczak7 , (1) Memorial Sloan Kettering Cancer Center, Montvale, New Jersey, (2) Columbia University, New York, NY, (3) Memorial Sloan Kettering Cancer Center, West Harrison, NY, (4) Memorial Sloan Kettering West Harrison, West Harrison, NY, (5) Memorial Sloan Kettering Cancer Center, New York, NY, (6) Memorial Sloan Kettering Cancer Center, Montvale, NJ, (7) Memorial Sloan Kettering Cancer Center, West Harrison, NY
TU-D-KDBRA1-5Performance of a Dual-Layer Staggered MLC System in Stereotactic Treatment for Multiple Brain Metastases with a Single Isocenter: A Dosimetric Comparison Across Three Delivery Techniques
T Li1*, H Liu2 , W Shi2 , J Zou1 , B Teo1 , L Dong1 , (1) University of Pennsylvania, Philadelphia, PA, (2) Thomas Jefferson University, Philadelphia, PA
TU-D-KDBRA1-7SRS Plan Evaluation and Optimization Metrics, Is It Time to Move Past CI and GI?
G Baran1*, M Dominello2 , J Burmeister1,2 , (1) Karmanos Cancer Institute, Detroit, MI, (2) Wayne State University School of Medicine, Detroit, MI
TU-E115-GePD-F4-6Trajectory-Based Dynamic Couch Motion Optimization Technique for Intracranial Stereotactic Radiosurgery: A Single π-Based Geometry Approach for Brain SRS Treatment Planning
G Gill*, R Jakubovic , J Chang , Long Island Jewish Medical Center, Northwell Health, NY
TU-I345-GePD-F3-4Shortcomings of Common Conformity and Gradient Indices for Multi-Target SRS Plans
G Baran1*, M Dominello2 , J Burmeister1,2 , (1) Karmanos Cancer Institute, Detroit, MI, (2) Wayne State University School of Medicine, Detroit, MI
WE-C1000-GePD-F7-3Quality Assurance for Multi-Focal Single Isocenter Stereotactic Radiosurgery Through 3D Gel Dosimetry
D Saenz1*, K Papanikolaou1, K Rasmussen1 , N Kirby1 , S Stathakis1 , E Pappas2 , Y Li1 , (1) Ut Health San Antonio, San Antonio, Texas, (2) RTsafe P.C., Athens, Greece
WE-C1030-GePD-F3-5Dosimetric Impact of Rotational Setup Errors On Multiple Brain Targets Treated with Single Isocenter Volumetric Modulated Arc Therapy
J Xue*, D No , J Zhang , H Wang , D Barbee , S Lymberis , J Silverman , I Das , NYU Langone Medical Center, New York, NY
WE-C930-GePD-F3-2Dosimetric Evaluation of Three Stereotactic Radiosurgery Treatment (SRS) Options for Multiple Brain Metastases
I Vergalasova1*, H Liu2 , W Shi2 , K Nie1 , N Yue1 , T Li3 , (1) Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, (2) Thomas Jefferson University, Philadelphia, PA, (3) University of Pennsylvania, Philadelphia, PA
WE-C930-GePD-F9-4The Effect of Setup Uncertainty On Optimal Prescription Percentage Isodose Surface (%IDS) in Stereotactic Radiosurgery
X Duan*, W Giles , F Yin , Duke University Medical Center, Durham, NC