DESILVA AZIMA THE ANALYSIS OF ORGAN AT RISK DOSE DISTRIBUTION IN BREAST CANCER WITH 3D-CRT TECHNIQUE AND HALF BEAM BLOCK AT RADIOTHERAPY INSTALLATION OF ARIFIN ACHMAD RIAU PROVINCE HOSPITAL 5 Chapters + 48 Pages + 6 Figures + 14 Tables + Attachments Breast cancer is a malignant epithelial cells that lining the lobes and ducts of the breast but it is uncontrollable and causes malignancy that …