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Table 3 Dosimetric analysis in the group of patients with pelvic radiotherapy (n= 38)

From: Does gap-free intensity modulated chemoradiation therapy provide a greater clinical benefit than 3D conformal chemoradiation in patients with anal cancer?

 

3D-CRT (n= 18) Mean value

IMRT (n= 20) Mean value

P value

Total dose

58.3 Gy

58.9 Gy

0.366

Urinary bladder

   

D mean

44.8 Gy

34.5 Gy

0.008

Dmax

59.8 Gy

55.4 Gy

0.363

Dmin

32.5 Gy

19.0 Gy

0.034

D95

34.1 Gy

22.8 Gy

0.061

Right femoral

   

head Dmean

29.9 Gy

26.9 Gy

0.582

Left femoral head

   

Dmean

32.8 Gy

27.1 Gy

0.133

Small bowel

   

Dmean

13.4 Gy

17.8%

0.632

Dmax

47.8 Gy

46.3%

1

V30

16%

22.7%

0.719

V40

0%

8.5%

0.195

V50

0%

2.9%

0.273

V60

0%

0.5%

0.484

PTV1

   

Dmax

62.1 Gy

62.3 Gy

0.473

Dmin

26.6 Gy

27.2 Gy

0.702

Dmean

51.1 Gy

50.3 Gy

0.962

D95

37.2 Gy

37.4 Gy

0.702

PTV2

   

Dmax

62.2 Gy

62.3 Gy

0.426

Dmin

33.9 Gy

44.8 Gy

0.408

Dmean

59.9 Gy

58.8 Gy

0.655

D95

57.8 Gy

57.6 Gy

0.014

  1. V30: volume of the considered organ receiving 30Gy or less (in %); V40: volume of the considered organ receiving 40Gy or less (in %); V50: volume of the considered organ receiving 50Gy or less (in %); V60: volume of the considered organ receiving 60Gy or less (in %); Dmax: maximal dose; Dmin: minimal dose; Dmean: mean dose; D95: dose delivered to 95% of the target.
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Radiation Oncology

ISSN: 1748-717X

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