Figure 4. Dose–volume histograms (DVHs) for a typical prostate patient. Solid lines indicate the 57 Gy intensity-modulated radiation therapy (IMRT) technique, dashed lines the 3D conformal radiotherapy (3DCRT) technique. DVHs are shown for (a) the prostate (clinical target volume (CTV)2) and planning target volume (PTV); (b) bladder (bl); (c) rectum (rec) and (d) left femoral head (fhl).