Abstract # 2119 Image-guided Radiation Therapy (RT) for Rectal Cancer Using Cone Beam CT (CBCT)

Presenter: Lee, Percy

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Uncertainty in targeting rectal tumors when treating with intensity modulated radiation therapy (IMRT) is a consequence of rectal motion due to filling and deformation. On-board CBCT was used to quantify the degree of rectal motion and volume change during RT. We evaluated the CBCT as a tool to measure the accuracy and precision of a simulated IMRT treatment delivery model for rectal cancer.

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