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Table 3 Mean time values for multiple atlas libraries of clinical target volumes and normal organs

From: Atlas-based auto-segmentation for postoperative radiotherapy planning in endometrial and cervical cancers

 

Size of atlas library

Manual contouring

20

40

60

ABAS-CTV

 Time (95% CI)

41.6 (40.4–42.6)

47.6 (46.0–49.2)

45.1 (44.0–46.1)

749.4 (622.3–860.4)

p-value

ref.

0.001

0.013 (0.023++)

 

ABASc-CTV

 Time (95% CI)

164.8 (139.3–195.2)

148.1 (131.9–164.0)

191.1 (162.8–221.1)

749.4 (622.3–860.4)

p-value

ref.

0.220

0.187 (0.038++)

 

p-value*

0.001

0.001

0.001

 

Femur

 Time (95% CI)

31.1 (28.4–34.4)

32.7 (31.3–34.1)

37.5 (36.3–38.8)

128.1 (122.3–135.1)

p-value

ref.

0.316

0.005 (0.003++)

 

Femur-sm

 Time (95% CI)

60.7 (55.9–65.4)

64.8 (63.3–66.2)

74.1 (72.4–75.9)

256.0 (244.5–262.1)

p-value

ref.

0.125

0.002 (0.001++)

 

p-value**

0.001

0.001

0.001

 

ABAS-bladder

 Time (95% CI)

42.8 (41.1–44.6)

44.6 (43.3–45.9)

45.6 (43.9–47.2)

142.0 (115.2–171.4)

p-value

ref.

0.052

0.010 (0.108++)

 

ABASc-bladder

 Time (95% CI)

286.3 (256.3–315.6)

350.7 (319.3–382.5)

375.7 (345.5–405.0)

142.0 (115.2–171.4)

p-value

ref.

0.001

0.001 (0.001++)

 

p-value*

0.001

0.001

0.001

 
  1. Abbreviations: ABAS atlas-based auto-segmentation alone, ABASc manually corrected ABAS, CTV clinical target volume, DC Dice’s coefficient, HD Hausdorff distance, CI confidence interval
  2. * Comparison between ABAS and ABASc
  3. ** Comparison between Femur and Femur-sm
  4. ++ Comparison between atlas size 40 and 60