PREDICTIVE VALUE OF 0.35T MRI DELTA-RADIOMICS FEATURES IN IMAGE-GUIDED PANCREATIC SBRTG Simpson, B Farnia, L Portelance, J Ford, N Dogan, F YangUniversity of Miami, Miami, FL

7/29/2018 | 2:05 - 3:00 PM | Davidson Ballroom B

QUALITATIVE EVALUATION OF GATING SENSITIVITY TO LATENCY AND TEMPORAL RESOLUTION IN MRI-GUIDED RTT Mazur, A Curcuru, O Green, S Mutic, P Parikh, L SantanamWashington University in St Louis, St Louis, MO

7/29/2018 | 5:05 - 6:00 PM | Karl Dean Ballroom B1

ASSESSMENT OF TREATMENT EFFICIENCY AND INTRA-FRACTIONAL TUMOR MOVEMENTS USING REAL-TIME CINE-MR IN MR-IGRT SYSTEMJ Kuwahara, T Sakasai, H Okamoto, Y Miura, S Nishioka, Y Abe, J ItamiNational Cancer Center Hospital, Chuo-ku, Tokyo

7/29/2018 | 3:00 - 6:00 PM | Exhibit Hall

EVALUATION OF A NOVEL PELVIC END-TO-END (PETE) PHANTOM IN MR-ONLY AND MR-IGRT WORKFLOWSJ 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

7/29/2018 | 5:05 - 6:00 PM | Karl Dean Ballroom B1

COMMISSIONING AND VALIDATION OF PATIENT-SPECIFIC QUALITY ASSURANCE ON AN MR-LINACD Du, J Kim, C Glide-Hurst, A Doemer, N Wen, B Movsas, J Dragovic, I ChettyHenry Ford Health System, Detroit, MI

7/29/2018 | 2:05 - 3:00 PM | Karl Dean Ballroom A2

DESIGN AND IMPLEMENTATION OF A HEAD AND NECK ANTHROPOMORPHIC PHANTOM USED IN MRI GUIDED RADIOTHERAPY SYSTEMSA Steinmann, P Alvarez, H Lee, Z Wen, G Sawakuchi, L Court, R Stafford, C Fuller, D Followill UT MD Anderson Cancer Center, Houston, TX

7/29/2018 | 5:05 - 6:00 PM | Karl Dean Ballroom B1RADIATION MAP AND EFFECTIVE TENTH VALUE LAYER MEASUREMENTS OF AN MR-GUIDED JAWLESS RING-GANTRY LINEAR ACCELERATORO Green, B Cai, J Cammin, A Price, S Mutic, S GodduWashington University, St. Louis, MO

7/29/2018 | 2:05 - 3:00 PM | Karl Dean Ballroom A2

NOVEL PHANTOM VALIDATION OF SUSCEPTIBILITY-RELATED DISTORTIONSS P. Nejad-Davarani1, J Cunningham1,2, C Glide-Hurst1,2

Henry Ford Health System, Wayne State University, Detroit, MI

7/29/2018 |4:00 - 4:55 PM | Karl Dean Ballroom B1

INVESTIGATING THE CLINICAL UTILITY OF GAFCHROMIC EBT3 FILM DOSIMETRY IN AN MR-GUIDED LINACI Xhaferllari, J Kim, I Chetty, C Liu, D Du, A Doemer, C Glide-Hurst, B Movsas, J Dragovic, N Wen Henry Ford Health System, Detroit, MI

7/29/2018 |5:05 - 6:00 PM | Karl Dean Ballroom B1

GEOMETRIC AND RADIATION CHARACTERIZATION OF A NEW DOUBLE STACK MULTILEAF COLLIMATOR IN A LOW FIELD MR-LINACA Doemer, C Glide-Hurst, J Kim, N Wen, B Movsas, I ChettyHenry Ford Health System, Detroit, MI

7/29/2018 | 2:05 - 3:00 PM | Karl Dean Ballroom A2

CORRELATION BETWEEN TUMOR AND VESSEL MOTION IN THE LIVERS Jupitz, A Shepard, P Hill, B BednarzUniversity of Wisconsin, Madison, WI

7/29/2018 | 4:00 - 4:55 PM | Room 202

MRI GUIDED RADIOTHERAPY OF CENTRALLY LOCATED THORACIC TUMORS: EFFECT OF CARDIAC MOTIONY Yang1, Y Gao1, F Han3, P Lee1, S Rashid2, J Lamb1, M Cao1, D Low1, P Hu1

(1) UCLA School of Medicine, Los Angeles, CA, (2) Stony Brook University, Stony Brook, NY, (3) SIEMENS healthscience, Los Angeles, CA

7/29/2018 |5:05 - 6:00 PM | Karl Dean Ballroom B1

DIAGNOSTIC VALUE OF 0.35T MR RADIOMIC FEATURES IN RECOGNITION OF TUMOR ORIGIN IN LIVER CANCERG Simpson, D Asher, J Ford, L Portelance, F Yang, N DoganUniversity of Miami, Miami, FL

7/29/2018 |3:00 - 6:00 PM | Exhibit Hall

FEASIBILITY OF MOSFET REAL-TIME IN-VIVO DOSIMETRY FOR MRI-LINAC BEAMS UNDER 0.34 T MAGNETIC FIELDD Tewatia1, P Yadav1, I Tanumihardjo1, A Hallil2, B Paliwal1 (1) University of Wisconsin-Madison, Madison, WI,(2) Best Medical Canada, Ottawa, ON

7/29/2018 | 5:05 - 6:00 PM | Karl Dean Ballroom B1

AN IMAGE PROCESSING TECHNIQUE FOR IDENTIFICATION OF INTERSTITIAL CATHETERS IN HIGH- AND LOW-FIELD MR-GUIDED HDR BRACHYTHERAPYK Singhrao, S Park, T Wong, Y Gao, M Guo, J Fu, P Hu, Y Yang, A Chang, J LewisUCLA School of Medicine, Los Angeles, CA

7/30/2018 | 9:30 - 10:00 AM | Exhibit Hall | Forum 4

STRATEGICALLY ACQUIRED ON-BOARD MRI FOR ARTC Glide-Hurst*Henry Ford Health System, Farmington Hills, MI

7/31/2018 | 8:30 - 9:30 AM | Karl Dean Ballroom B1

MR SAFETY - HYBRID ENVIRONMENTA Panda1, R Stafford2, A Doemer3 (1) Mayo Clinic, Arizona, Scottsdale, AZ, (2) UT MD Anderson Cancer Center, Houston, TX, (3) Henry Ford Health System, Detroit, MI

7/30/2018 |4:30 - 6:00 PM | Room 205

COMMISSIONING A MONTE CARLO DOSE CALCULATION ALGORITHM IN HETEROGENEOUS MEDIA FOR A MAGNETIC RESONANCE IMAGE GUIDED LINEAR ACCELERATORA Price, A Curcuru, F Reynoso, J Cammin, S Mutic, O GreenWashington University School of Medicine, St. Louis, MO

7/30/2018 |4:30 - 5:30 PM | Exhibit Hall | Forum 3

FEASIBILITY OF ONLINE SRS WITH MRIDIAN: DOSIMETRIC COMPARISON OF MRIDIAN TO TRUEBEAM WITH HDMLCM Malin, E Lobb, M Stevens, G Redler, K Yenice, B AydoganThe University of Chicago Medical Center, Chicago, IL

7/30/2018 | 1:15 - 1:45 PM |Exhibit Hall | Forum 4

IMPLANTABLE PULSE GENERATOR RADIOFREQUENCY SAFETY CONSIDERATIONS FOR LOW FIELD MRI-GUIDED RADIOTHERAPYH Gach1

Washington University in St. Louis, St. Louis, MO

7/30/2018 | 1:15 - 1:45 PM | Exhibit Hall |Forum 8

7/31/2018 | 9:30 - 10:00 AM | Exhibit Hall |Forum 8 A MODIFICATION METHOD OF SIGNAL INTENSITY FOR FABRICATING A MULTI-MODALITY PHANTOM IN MR IMAGE-GUIDED THERAPY: USING A SILICONE OILM Kim, J Park, C Choi, J Yoon, H An, J KimSeoul National University Hospital, Seoul, SEOUL

CHARACTERIZATION AND VALIDATION OF TLD AND EBT3 FILM IN MR/CT VISIBLE PHANTOMS UNDER THE PRESENCE OF 0T, 0.35T AND 1.5TA Steinmann1, D O’Brien2, K Mittauer3, J Bayouth3,G Sawakuchi1, Z Wen1, L Court1, R Stafford1, C Fuller1, D Followill1

(1) UT MD Anderson Cancer Center, Houston, TX,(2) Elekta, London, UK ,(3) University of Wisconsin-Madison, Madison, WI

7/31/2018 |10:00 - 10:30 AM | Exhibit Hall | Forum 2

ASSESSMENT OF GRADIENT NONLINEARITY DISTORTIONS IN A LOW-FIELD MR-LINAC USING A MODULAR LARGE FIELD OF VIEW PHANTOMS P. Nejad-Davarani1, E Barberi2, M Cole2, C Glide-Hurst1

(1) Henry Ford Cancer Institute, Detroit, MI, (2) Modus Medical Devices Inc., London, Ontario

7/31/2018 | 10:00 - 10:30 AM | Exhibit Hall | Forum 2

ADVANCED MRI: NOVEL APPLICATIONS FOR RADIATION ONCOLOGYC Glide-Hurst1, E Paulson2, K Sheng3

(1) Henry Ford Health System, Farmington Hills, MI, (2) Medical College of Wisconsin, Milwaukee, WI, (3) UCLA School of Medicine, Los Angeles, CA

7/31/2018 | 8:30 - 9:30 AM | Karl Dean Ballroom B1

WHAT PREDICTS TARGET COVERAGE IN MR-GUIDED ADAPTIVE RADIATION THERAPY OF THE PANCREAS? IT IS NOT OAR NEAREST DISTANCEA Thomas, A Curcuru, O Green, P ParikhWashington University in St Louis, St Louis, MO

7/30/2018 |3:45 - 4:15 PM | Exhibit Hall | Forum 5

AAPM 60TH ANNUAL MEETING

Learn more about MRIdian® and MRI-Guided Real-time, On-table, Adaptive Radiotherapy (ROARTM) .throughout the scientific program of the AAPM 60th Annual Meeting.

THREE-DIMENSIONAL POLYMER GEL DOSIMETRY USING AN ONBOARD 0.35 T MAGNETIC RESONANCE IMAGING SCANNERB Maraghechi, H Gach, D Yang, H LiWashington University School of Medicine, St. Louis, MO

7/29/2018 | 3:00 - 6:00 PM | Exhibit Hall

CHARACTERIZATION AND VALIDATION OF TLD AND EBT3 FILM IN MR/CT VISIBLE PHANTOMS UNDER THE PRESENCE OF 0T, 0.35T AND 1.5TA Steinmann1, D O’Brien2, K Mittauer3, J Bayouth3, G Sawakuchi1, Z Wen1, L Court1, R Stafford1, C Fuller1, D Followill1

(1) UT MD Anderson Cancer Center, Houston, TX,(2) Elekta, London, UK ,(3) University of Wisconsin-Madison, Madison, WI

7/31/2018 |10:00 - 10:30 AM | Exhibit Hall | Forum 2

IMMOBILIZATION AND GEOMETRIC DISTORTION STUDY FOR MAGNETIC RESONANCE IMAGING GUIDED STEREOTACTIC RADIOSURGERY ON THE VIEWRAY MR-LINACE Omari, G Hugo, O Green, S Mutic, H Gach, N Knutso, F ReynosoWashington University in St. Louis, St Louis, MO

7/31/2018 | 3:45 - 4:15 PM | Exhibit Hall | Forum 5

7/31/2018 |1:15 - 1:45 PM | Exhibit Hall | Forum 2

GATING EVALUATION OF AN MRGRT SYSTEM USING A NOVEL MR-COMPATIBLE MOTION PHANTOMJ Kim1, E Barberi2, I Chetty1, B Movsas1, C Glide-Hurst1

(1) Henry Ford Health System, Royal Oak, MI, (2) Modus Medical Devices Inc., London, Ontario

VALIDATION OF THE ELECTRON RETURN EFFECT IN A LOW-FIELD MR-LINAC USING A NOVEL PHANTOML Rakotondravohitra1,2, D Du2, J Kim2, J Cunningham1,2, I Chetty2, C Glide-Hurst1,2

(1) Wayne State University, Detroit, MI (2) Henry Ford Cancer Institute, Detroit, MI

7/31/2018 |10:00 - 10:30 AM | Exhibit Hall | Forum 2

DEVELOPMENT OF 3D PRINTED IMMOBILIZATION FOR THE MR-LINAC: TOWARD HIGH PRECISION BRAIN TREATMENTSC Glide-Hurst, E Myer, D Du, J Kim, N Wen, B Movsas, S Siddiqui, T Walbert, S Kalkanis, I ChettyHenry Ford Cancer Institute, Detroit, MI

7/31/2018 | 10:00 -10:30 AM | Exhibit Hall | Forum 2

IMPACT OF ABDOMINAL COMPRESSION ON MR-GUIDED RADIATION THERAPYJ Cunningham1,2, D Du2, C Glide-Hurst1,2

(1) Wayne State University, Detroit, MI, (2) Henry Ford Cancer Institute, Detroit, MI

7/31/2018 | 10:00 - 10:30 AM | Exhibit Hall | Forum 2

SURFACE DOSE MEASUREMENTS IN AN MR IMAGE-GUIDED RADIATION THERAPY SYSTEM USING OSLDS: COMPARISON WITH AND WITHOUT A STATIC 0.35 T MAGNETIC FIELDJ Cammin, A Price, B Cai, S Mutic, O GreenWashington University in St Louis, St Louis, MO

7/31/2018 | 3:45 - 4:15 PM | Exhibit Hall | Forum 7

MONTE CARLO SIMULATION BASED DOSE CALCULATION IN MAGNETIC FIELDM Qi1, L Zhou1, Y Li2, T Song1 (1) Southern Medical University, Guangzhou, Guangdong, (2) SUN YAT-SEN UNIVERSITY CANCER CENTER, Guangzhou, Guangdong

7/31/2018 | 4:30 - 5:30 PM | Exhibit Hall | Forum 3

EVALUATION ON THE OUT-OF-FIELD IRRADIATION BY MAGNETIC FIELD DURING MR IMAGE-GUIDED RADIATION THERAPY: A PHANTOM STUDYH An1, J Kim1, C Choi1, S Kang2, J Cho1, S Lee1, M Kim1, J Park1

(1) Seoul National University Hospital, Seoul, SEOUL, (2) Seoul National University Bundang Hospital, Seongnam-si, Gyeonggi-do,

7/31/2018 |3:45 - 4:15 PM | Exhibit Hall | Forum 7

EVALUATION OF A NOVEL 3D DISTORTION AND QUALITY CONTROL PHANTOM FOR MR-GUIDED RADIATION THERAPYA Antolak1, B Paliwal1, E Jackson1, R Mallozzi2, P Yadav1 (1) University of Wisconsin, Madison, WI, (2) The Phantom Laboratory, Inc., Salem, New York

7/31/2018 |3:45 - 4:15 PM | Exhibit Hall | Forum 2

MULTI-MODALITY ART (PROTONS, MRI, PET)

P Parikh1, G Hugo2, B Teo3, D Yan4

(1) Washington university School of Medicine, Saint Louis, MO, (2) Washington University in St. Louis, St Louis, MO, (3) University of Pennsylvania, Philadelphia, PA, (4) William Beaumont Hospital, Royal Oak, MI

7/31/2018 |4:30 - 6:00 PM | Karl Dean Ballroom B1

FEASIBILITY OF SPINE SBRT PLANNING USING THE VIEWRAY MR-LINAC TREATMENT PLANNING SYSTEMM Stevens, M Malin, G Redler, B AydoganUniversity of Chicago Medical Center, Chicago, IL

7/31/2018 |3:45 - 4:15 PM |Exhibit Hall | Forum 7

TREATMENT RESPONSE PREDICTION USING TEXTURE FEATURES FROM LONGITUDINAL DIFFUSION MRI IN SARCOMA PATIENTSY Gao1, C Gu1,2, J Kim1, M Cao1, J Fu1, A Kalbasi1, D Ruan1, J Lewis1, D Low1, P Hu1, Y Yang1

(1) UCLA, Los Angeles, CA, (2) Xi’an Jiaotong University, Xi’an, Shaanxi

8/1/2018 | 7:30 - 9:30 AM | Karl Dean Ballroom C

ACCURACY OF MULTI-MODALITY DEFORMABLE IMAGE REGISTRATION WITH MR AND CT IN MR-IGRT SYSTEMT Sakasai, J Kuwahara, H Okamoto, S Nishioka, Y Miura, H Igaki, Y Abe, J Itami National Cancer Center Hospital, Chuo-ku, Tokyo

8/1/2018 | 10:00 - 10:30 AM | Exhibit Hall | Forum 2

STRATEGIES TO MITIGATE GANTRY ANGLE SPECIFIC INHOMOGENEITIES IN A LOW-FIELD MR-LINACC 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

8/1/2018 |10:15 - 12:15 PM | Karl Dean Ballroom B1

AUTOMATIC SEGMENTATION OF MULTIPLE ORGANS FROM VIEWRAY MR IMAGES USING DEEP DENSELY CONNECTED CNN FOR MRI GUIDED ADAPTIVE RADIOTHERAPYY Fu1, T Mazur2, S Liu3, X Chang4, Y Lu5, H Li6, P Parikh7, D Yang8 (1-2, 4, 6-8) Washington University in Saint Louis, St. Louis, MO, (3) Stanford university Scool of Medicine, Stanford, CA, (5) Medical College of Wisconsin, Brookfield

8/1/2018 | 7:30 - 9:30 AM | Room 202

MODEL-INTERPOLATED GATING FOR MRI-GUIDED RADIOTHERAPYJ Ginn1, D O’Connell1, D Thomas2, D Low1, J Lamb1

(1) University of California Los Angeles, Los Angeles, CA, (2) University of Colorado, Denver, CO

8/1/2018 | 10:15 AM - 12:15 PM |Karl Dean Ballroom B1

TOWARDS TIME RESOLVED 3D DOSIMETRY IN MRI-LINACS: SCINTILLATION IMAGES SURROGATE DOSE DISTRIBUTION WITH HIGH ACCURACYP Bruza1, J Andreozzi1, O Green2, J Cammin2, D Gladstone1,3, B Pogue(1) Dartmouth College, Hanover, NH, (2) Washington University, School of Medicine, St. Louis, MO, (3) Dartmouth-

7/31/2018 |4:30 - 6:00 PM | Room 207

CHARACTERIZATION OF FERROMAGNETIC INFLUENCE OF A MR-GUIDED RADIOTHERAPY (MRGRT) SYSTEM AND VAULT: COBALT TO LINACK Mittauer1, P Yadav1, S McMain2, B Paliwal1, J Bayouth1

(1) University of Wisconsin-Madison, Madison, WI, (2) ViewRay Inc, Oakwood Village, OH

8/1/2018 |10:15 AM - 12:15 PM |Karl Dean Ballroom B1

FAST B0 MAP OF CARDIOVASCULAR IMPLANTABLE ELECTRONIC DEVICES AT LOW MAGNETIC FIELDSX Wu, C Robinson , P Cuculich , O Green , S Mutic , H GachWashington University School of Medicine, St. Louis, MO

8/1/2018 | 4:30 - 6:00 PM | Karl Dean Ballroom C

AN EVALUATION OF IMAGE-DERIVED RESPIRATORY SURROGATES FOR MRI-GUIDED RADIOTHERAPYJ Ginn, D Low, J Lamb University of California Los Angeles, Los Angeles, CA

8/1/2018 | 10:15 AM - 12:15 PM | Karl Dean Ballroom B1

MONTE CARLO DOSE CALCULATION AND REVIEW OF TG157I Chetty1, C Ma2

(1) Henry Ford Health System, Detroit, MI, (2) Fox Chase Cancer Center, Philadelphia, PA

8/1/2018 |4:30 -6:00 PM | Karl Dean Ballroom A2

ELECTRON RETURN EFFECT PREDICTIONS FROM TREATMENT PLANNING SYSTEM OF AN MR-LINAC UNDERESTIMATE THE OBSERVATIONS SEEN USING SCINTILLATION AND CHERENKOV OPTICAL IMAGINGJ Andreozzi1, P Bruza1, J Cammin2, D Gladstone3,1, B Pogue1, O Green2 (1) Dartmouth College, Hanover, NH, (2) Washington University, School of Medicine, St. Louis, MO, (3) Dartmouth-Hitchcock Medical Center, Lebanon, NH

8/1/2018 |10:15 AM - 12:15 PM| Karl Dean Ballroom B1

ACCURACY OF REAL-TIME LARGE AND SMALL BEAM MEASUREMENTS FROM AN MR-LINAC USING CHERENKOV IMAGING TECHNIQUE IN A WATER TANKJ Andreozzi1, P Bruza1, J Cammin2, D Gladstone3,1, B Pogue1, O Green2

(1) Dartmouth College, Hanover, NH, (2) Washington University, School of Medicine, St. Louis, MO, (3) Dartmouth

8/1/2018 |10:15 AM - 12:15 PM | Karl Dean Ballroom A1

PHANTOM- AND TASK-BASED IMAGE QUALITY ON A LOW FIELD MR INTEGRATED TREATMENT DELIVERY SYSTEM COMPARED TO DIAGNOSTIC SYSTEMSC Brunnquell, K Vigen, H Musunuru, M Bassetti, B Paliwal, P YadavUniversity of Wisconsin-Madison, Madison, WI

8/1/2018 | 4:30 - 6:00 PM | Karl Dean Ballroom C

A SOLUTION TO GANTRY ANGLE DEPENDENT MAGNETIC FIELD INHOMOGENEITIES FOR MR-IGRTHM Gach1, S Nikolova2, R Nikolov2, R Lotey2, S Mutic1, O Green1

(1) Washington University in St. Louis, St. Louis, MO, (2) ViewRay, Mountain View, CA

8/1/2018 | 4:30 - 6:00 PM | Karl Dean Ballroom C

PERFORMANCE OF A DOUBLY-FOCUSED DOUBLE-STACK MULTI-LEAF COLLIMATOR (MLC) SYSTEM ON A MR GUIDED LINEAR ACCELERATORB Cai, J Cammin, A Price, D Yang, J Park, V Rodriguez, S Mutic, O GreenWashington University in St Louis, St Louis, MO

8/2/2018 |7:30- 9:30 AM | Karl Dean Ballroom A1

TECHNICAL AND PROFESSIONAL PREPARATIONS FOR MEDICAL PHYSICISTS IN THE UPCOMING MRGRT ERAO Craciunescu1, J Cai2, C Glide-Hurst3, Y Yang4

(1) Duke University Medical Center, Durham, NC, (2) The Hong Kong Polytechnic University, Kowloon, Yau Tsim Mong, (3) Henry Ford Health System, (4) UCLA

8/2/2018 |1:00 - 2:00 PM | Karl Dean Ballroom A2

ABDOMINAL SYNTHETIC CT GENERATION FOR MR-ONLY LIVER RADIOTHERAPY USING CONDITIONAL GENERATIVE ADVERSARIAL NETWORKJ Fu1, A Santhanam1, M Cao1, M Guo1, K Singhrao1, V Yu1, D Ruan1, D Low1, J Lewis1

UCLA School of Medicine, Los Angeles, CA

8/2/2018 |1:00 - 3:00 PM | Karl Dean Ballroom B1

WORKING ON MRI GUIDED MACHINES (MRI-LINAC/CO60) FOR MEDICAL PHYSICISTS WHO ARE NOT TRAINED IN MRIC Glide-Hurst

Henry Ford Health System, Farmington Hills, MI

8/2/2018 | 1:00 - 2:00 PM | Karl Dean Ballroom A2