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Table 1 The average delineated target volumes, overall SDs and CIgen for all 4 patients

From: Considerable interobserver variation in delineation of pancreatic cancer on 3DCT and 4DCT: a multi-institutional study

Patient

 

GTV (rangea)

iGTV (rangea)

1

Average volume (cm3)

36.71 (14.02–75.87)

41.80 (11.85–89.99)

Overall SD (cm)

0.70 (0.47–0.72)

0.71 (0.60–0.72)

CIgen

0.34 (0.31–0.37)

0.29 (0.26–0.31)

2

Average volume (cm3)

20.26 (7.06–45.21)

20.57 (4.67–67.86)

Overall SD (cm)

0.84 (0.70–0.88)

0.90 (0.37–0.90)

CIgen

0.22 (0.20–0.27)

0.20 (0.17–0.27)

3

Average volume (cm3)

10.36 (2.91–19.92)

32.38 (5.67–93.58)

Overall SD (cm)

0.48 (0.42–0.51)

0.89 (0.77–0.94)

CIgen

0.34 (0.30–0.37)

0.16 (0.12–0.19)

4

Average volume (cm3)

52.32 (34.18–76.72)

65.52 (21.48–119.09)

Overall SD (cm)

0.43 (0.38–0.44)

0.68 (0.58–0.70)

CIgen

0.59 (0.57–0.62)

0.45 (0.42–0.50)

Overall for all patients

Average volume (cm3)

29.91

40.07c (P = 0.036)

Overall SD (cm)b

0.63

0.80

CIgen

0.37

0.27

  1. Abbreviations: GTV gross tumor volume, iGTV internal gross tumor volume, SD standard deviation, CI gen generalized conformity index
  2. aRange over eight delineations (average volume) or over results of the leave-one-out analysis (overall SD and CIgen)
  3. bNote that this overall SD was calculated as the root-mean-square of the four overall SDs from the four patients
  4. cTwo-sided Wilcoxon signed-rank test
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Radiation Oncology

ISSN: 1748-717X

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