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Table 1 Dose constraint of 40 Gy in 5 fractions

From: Quality of life after definitive linear accelerator-based stereotactic radiotherapy for prostate cancer: a longitudinal study

Dose constraint With SpaceOAR Without SpaceOAR
Prostate Volume Goal Tolerance Goal Tolerance
Urethra Max < 42.6 Gy < 43.0 Gy < 42.6 Gy < 43.0 Gy
PTV V110% < 0.5% < 2% < 0.5% < 2%
D99%  > 39.5 Gy  > 39.17 Gy  > 39.2 Gy  > 38.1 Gy
Max < 43.26 Gy < 44.14 Gy < 43.9 Gy < 45.5 Gy
Mean < 41.16 Gy < 41.71 Gy < 41.5 Gy < 42 Gy
Bladder V40Gy < 3.7% < 6% < 4.6% < 6%
V20Gy < 22.8% < 35% < 27.4% < 49%
V40.83 Gy < 6.2 cc < 8 cc < 6.9 cc < 10 cc
Max < 42.7 Gy < 44.14 Gy < 43.4 Gy < 45 Gy
Mean < 11.92 Gy < 16.55 Gy < 13.7 Gy < 20 Gy
Rectum 1 cm above and below the PTV     
V40Gy < 0.5% < 1.5% < 2.5% < 4%
V36Gy < 2.5% < 5.7% < 8% < 11%
V32Gy < 5% < 10% < 13% < 17%
V30Gy < 6.8% < 13% < 16% < 20%
V20Gy < 28.2% < 34% < 32% < 39%
Max < 40.83 Gy < 42.48 Gy < 42.7 Gy < 43.9 Gy
Mean < 16.88 Gy < 18.21 Gy < 17.4 Gy < 19.6 Gy
Femoral head Max < 17.66 Gy < 18.76 Gy  17.66 Gy < 18.76 Gy
Sigmoid colon V30Gy < 0 cc   < 1 cc  
Penile bulb Max < 40 Gy   < 40 Gy  
Small bowel V30Gy 0 cc < 5 cc 0 cc < 5 cc