Fig. 2

Examples of colour wash dose distributions on CT axial slices a 51.30 Gy (95% of 54 Gy, PTV54); b 61.75 Gy (95% of 65 Gy, PTV65); and c 69.55 Gy (107% of 65 Gy, PTV65) for a representative case in groups I (left), II (middle) and III (right). Structure colours: PTV54—blue; PTV65—red; GTV–black; GTV plus 5 mm margin—magenta; GTV plus 10 mm margin—green