Table 1 Current dosimetric guidelines and isodose volumes stratified by ENI

Rectum

Mean (±SD)

V₇₀

<10 cc³

2.1 cc (±1.5 cc)

2.4 cc (± 2.0 cc)

0.369

V₆₀

<10 cc⁴

8.3 cc (±4.2 cc)

9.2 cc (±5.0 cc)

0.158

V₅₀

<17%⁴

19.5% (±9.1%)

23.0% (±10.6%)

0.021

V₃₀

<35%⁴

53.6% (±20.0%)

69.8% (±21.4%)

<0.001

Bladder

V₆₀

<10%⁴

12.1% (±10.1%)

13.4% (±10.8%)

0.197

V₅₀

<25%⁴

20.5% (±15.2%)

27.1% (±15.7%)

<0.001

V₃₀

<50%⁴

47.2% (±28.0%)

72.9% (±25.5%)

<0.001