Was diagnosed with stage 0 high grade on my left side. Had a lumpectomy 6 weeks ago with clean margins. Radiation has been recommended to prevent a recurrence. I am very concerned about radiation to my heart as I am in my 60s and have a family history of heart disease. I heard about a newer form of radiation, Proton therapy, that controls depth and stray beams to better protect the heart and adjacent areas. Has anybody had or investigated Proton radiation?