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Table 2 Mean absolute dose parameters of different anal sphincters in rectal cancer patients treated with IMRT or 3D-radiation technique

From: Impact of VMAT-IMRT compared to 3D conformal radiotherapy on anal sphincter dose distribution in neoadjuvant chemoradiation of rectal cancer

 

D98%

D2%

Dmean

Dmedian

Anal Sphincter (Gy)

 IMRT

22,7

45,8

34,3

35,3

 3D

31,4

46,2

43,3

45,0

 p-value

0,009

0,007

0,004

0,009

Internal Anal Sphincter (Gy)

 IMRT

23,9

40,2

30,9

29,7

 3D

35,3

45,8

43,2

44,5

 p-value

0,004

0,007

0,004

0,009

External Anal Sphincter (Gy)

 IMRT

22,6

40,3

30,5

29,3

 3D

30,1

45,5

40,6

42,0

 p-value

0,005

0,007

0,009

0,010

Levator Ani (Gy)

 IMRT

36,6

46,9

44,5

45,9

 3D

41,7

46,5

45,5

45,5

 p-value

0,000

0,005

0,008

0,005

  1. IMRT Intensity modulated radiation therapy, 3D 3D-conformal radiation therapy, Gy Gray
  2. boldfaced p-values are statistically significant