Fig. 2From: Volumetric and dosimetric comparison of organs at risk between the prone and supine positions in postoperative radiotherapy for prostate cancerAn example of the target volumes and the extended regions of the planning target volume. Yellow clinical target volume (CTV), red planning target volume (PTV), green PTV + 0.5 cm, purple PTV + 1 cm, blue PTV + 2 cm, pink PTV + 3 cm, orange PTV + 4 cmBack to article page