Table 1 Target dosimetric criteria and OARs constraints used for the plan optimization

PTV

 \({\text{V}}_{{95{\text{\% }}}} \left( {23.75{\text{Gy}}} \right)\)

> 99%

 \({\text{V}}_{{107{\text{\% }}}}\) (26.75 Gy)

< 5 cc

 \({\text{V}}_{{110{\text{\% }}}}\) (27.50 Gy)

< 0.5 cc

Bladder

 \({\text{D}}_{{15{\text{cc}}}}\)

< 18.3 Gy

 \({\text{D}}_{{0.5{\text{cc}}}}\)

< 38 Gy

Small bowel

 \({\text{D}}_{{0.5{\text{cc}}}}\)

< 30 Gy; < 35 Gy^a

 \({\text{D}}_{{5{\text{cc}}}}\)

< 25 Gy^a

 \({\text{D}}_{{10{\text{cc}}}}\)

< 25 Gy

Femoral heads

 \({\text{D}}_{{10{\text{cc}}}}\)

< 30 Gy