Clinical Study

Decreasing the Dose to the Rectal Wall by Using a Rectal Retractor during Radiotherapy of Prostate Cancer: A Comparative Treatment Planning Study

Table 3

The average volume of the prostate (CTV), rectal wall, and the bladder with and without the rectal retractor (range).

With retractor (cm3)Without retractor (cm3)Volume difference (cm3)

Prostate45 (24–67)45 (28–81)0
Rectal wall46 (37–58)35 (25–57)11 (+31%)
Bladder156 (60–371)144 (47–353)12 (+8%)