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Clinical Applications And Feasibility Of Proton Ct And Proton Radiography, Christina Marie Sarosiek
Clinical Applications And Feasibility Of Proton Ct And Proton Radiography, Christina Marie Sarosiek
Graduate Research Theses & Dissertations
Proton therapy is a form of radiation treatment for cancer that utilizes the Bragg peak to create conformal high dose regions around the tumor volume. However, the use of x-ray computed tomography (CT) and x-ray radiography for treatment planning and pre-treatment quality assurance procedures improves the achievable effectiveness of proton treatment plans (using proton CT) and the pretreatment verification (using proton radiography). Errors in the conversion from x-ray Hounsfield units (HU) to proton relative stopping powers (RSP) leads to errors in the predicted proton range. To account for the errors, 3.5% margins are included in the treatment plan. This means …