|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Advanced Manufacturing
||Reducing Radiation Exposure to the Rectum during Prostate Cancer Radiation Therapy using NiTi Shape Memory Alloy
||Hossein Lavvafi, Ayush Tiwari, Ahmadreza Jahadakbar, Mahbod Pourriahi, Mohammad Elahinia, Vijaya Kumar Devabhaktuni, E. Ishmael Parsai
|On-Site Speaker (Planned)
An effective radiotherapy treatment entails maximizing radiation dose to the tumor while sparing surrounding tissues. With the advent of SBRT in treating tumors including prostate where ablative dose is delivered in smaller number of fractions, rectum remains a dose limiting organ and at the risk of rectal toxicity or secondary cancer. An effective solution to such problem is to physically displace the organ at risk. This research presents an organ re-positioner device that is designed to displace the rectum away from the path of radiation beam employing a NiTi alloy that is shape-set for displacing the rectum upon actuation. A circuit has been designed for inducing and controlling this reversible austenitic-martensitic transformation in a reliable, reproducible, and safe manner. The study finds the novel organ re-positioner device to be a promising tool that can be applied in a clinical setting for minimizing dose to the rectum during prostate radiation treatment.
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