Skip to main content

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