Is Radiation Therapy With X-rays Really Needed Here?

Hi there. Two weeks ago following a fnb in April, i had a lumpectomy and snb. They insist upon 6-7 weeks of radiation. I ve gone macrobiotic and am willing to consider different healthy options but I m curious to know if radiation therapy legally requires 4 X-rays a week just to check positioning ( no thyroid protection, etc) and if does more harm than good. And isn t proton therapy the way to go if you do it? I don t want to radiate my heart. Thank you.