Abstract # 2829 Optimizing the Cardiac and Pulmonary Dose: A Comparison of IMRT Photon and 3-D Proton Treatment Planning for Distal Esophageal Cancer

Presenter: Crowley, Elizabeth

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DVH results were obtained for 16 proton and IMRT distal esophageal plans generated for 8 patients. Overall, the proton plans achieved comparable CTV coverage, but with superior dose homogeneity. The average global maximum dose was 106% with protons and 114% with IMRT. Proton plans also yielded lower lung dose across V5, V10, V20, V30, and V40. This difference was most striking in the low dose region, with a combined lung V5 of 31.6% and 69.8% for protons and IMRT respectively. In spite of the superior lung sparing, cardiac dose was also lower using protons, with lower cardiac V10, V20, V30, V40 and V50. Spinal cord planning constraints were achieved for all patients.