Abstract #3895

Low field Breast and Chest Wall Imaging for MR guided Proton Therapy

Neha Koonjoo^1,2, Torben P.P Hornung^1,2,3, Susu Yan^3,4, Matthew S Rosen^1,2,5, and Thomas R Bortfeld^3,4

¹Department of Radiology, A.A Martinos Center for Biomedical Imaging / MGH, Charlestown, MA, United States, ²Harvard Medical School, Boston, MA, United States, ³Department of Physics, ETH Zürich, Zürich, Switzerland, ⁴Department of Radiation Oncology, MGH, Boston, MA, United States, ⁵Department of Physics, Harvard University, Cambridge, MA, United States

Synopsis

Keywords: Low-Field MRI, Breast, Hybrid & Novel System TechnologyThe use of low field MRI guidance in proton therapy is a new area of research especially during treatment of breast cancer. In this study, we optimized and constructed five different breast/chest RF coils at low field as proof of concept for a future MR guided proton therapy system design. Different coil shapes and sizes were tested. Organs-at-Risk (OAR) and different anatomical regions were optimized for imaging. Using the five coils, phantom images were acquired at 6.5 mT and MR signal across slices were compared to the calculated optimized B₁ field homogeneity. Human breast imaging was also carried out.

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