Planning target volume (PTV) for intensity-modulated radiation therapy (IMRT) of prostate cancer

The two intraprostatic lesions were initially identified on magnetic resonance scanning, then registered onto treatment planning CT images. (A) Coronal image of the PTV contoured in red, with the dominant intraprostatic lesion at the left base of the prostate (DIL1) contoured in pink (arrow) and the dominant intraprostatic lesion at the right apex of the prostate (DIL2) contoured in orange (arrowhead). (B) Axial image demonstrating the PTV and the DIL2 with the rectum in purple. (C) Axial image of the PTV and the DIL1 with the bladder in blue (arrowhead).