Deep Inspiration Breath Hold Technique for Right Breast Irradiation with Supraclavicular and Internal Mammary Lymph Nodes

Abstract

The max dose for the lung plan was 136%, 135.3%, and 128%, for the 20 Gy, 15 Gy, and 10 Gy plans, respectively. All neck and lung plans were able to achieve negligible dose to the spinal cord, esophagus, untreated lung, and heart. The treated lung had V8 Gy of 1.9%, 0.8%, and 0.1% for 20 Gy, 15 Gy, and 10 Gy doses, respectively.The lung plans required a higher number of MUs (3512-12,327) than the neck plans (2280-9764). Conclusion: This study demonstrates that it is feasible to create LRT plans for neck and lung tumors using VMAT. These plans are currently under quality assurance testing. We plan to use this planning process in an upcoming institutional trial to examine the safety, efficacy, and immunogenicity of ablative LRT for oligometastatic conventional chondrosarcoma, a radioresistant, "cold" tumor with few promising treatment options.