Table 2.

Set of requirements that have to be satisfied by the planned treatment (29).

Organ	dosimetric constraints
Target volume	V95% > 95%, never above 107%
Rectum	V50 <50%, V60 <35%, V65 <25%, V70 <20%, V75 <15%
Anus	V30 <50%
Bulbourethral Glands	$\overline{\text{D}}$ <50 Gy
Femurs	$\overline{\text{D}}$ <52 Gy, V60 <5%
Bladder	$\overline{\text{D}}$ <65 Gy, V65 <50%, V70 <35%, V75 <25%, V80 <15%

The checks are performed using the DVH information obtained using the Pinnacle software to evaluate the expected absorbed dose in the different patient tissues. $\overline{\text{D}}$ is the mean dose absorbed by a given organ or region. V _XX is the fraction of volume of a given OAR (or PTV) that absorb a given (XX Gy) amount of dose. The requirement V _XX <YY% should be read as: YY% of the referred organ or region must absorb less than XX Gy.