Figure 2. Dose–volume histogram (DVH) curves for the organs at risk for a representative patient. (a) Liver, (b) spinal cord, (c) left kidney, and (d) right kidney. [y-axis: %Volume; x-axis: Dose (Gy); Colour Scheme- Blue: opposed anterior-posterior: posterior-anterior (AP/PA) plan; Red: 3F Plan; Green: IMRT plan].