Treatment dose planning parameters for 25 Gy in 2 fractions
URETHRA
The PTV will be treated with the prescribed dose of 25 Gy in 2 fractions. The volume of the PTV receiving the Prescription Dose (VPrescription Dose) of 25 Gy should be ≥ 95% and not exceed 125% (hotspot). The urethra should be expanded with a 3 mm PRV and should not receive more than a point dose of 110% of the prescription dose of 25 Gy (see Additional file 