184 Analysis of Radiation Dosimetry Predictive for Toxicity in Rectal Cancer Patients Treated with Long Course Chemo-Radiation. (October 2019) - Abraham, Aswin George; Thai, JoAnn; Ghosh, Sunita; Warkentin, Brad; Yun, Jihyun; Severin, Diane; Tankel, Keith; Joseph, Kurian; Nijjar, Tirath; Fairchild, Alysa; Cheung, Winson; Xu, Yuan