Figure 3: Dose Volume Histograms (DVH) of the arm plexus for different treatment set up, a) 6MV ap beam, 13x3.2Gy (max of build-up), b) 6MV ap-pa opposed beams, midline dose, equally weighted 13x3.2Gy, c) Co60 ap-pa opposed beams, midline dose, equally weighted 13x3.168Gy, d) Co60 ap-pa opposed beams, midline dose, equally weighted 13x3.3Gy.