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Table 1 Difference between GTV lengths on scans obtained using various modalities and postoperative pathologic lesion length

From: Improved longitudinal length accuracy of gross tumor volume delineation with diffusion weighted magnetic resonance imaging for esophageal squamous cell carcinoma

Imaging modality

GTV length on images (mm)

Difference value between GTV length and pathologic lesion length (mm)

p-value of GTV length on images and pathologic lesion length

95% confidence interval of difference value

CT

48.91 ± 18.92

3.63 ± 12.06

0.058

(−20.01-27.27)

T2WI

48.75 ± 20.35

3.46 ± 11.41

0.056

(−18.90-25.82)

b = 400 DWI

46.01 ± 17.21

0.73 ± 6.09

0.444

(−11.21-12.67)

b = 600 DWI

44.75 ± 17.48

−0.54 ± 6.03

0.564

(−12.36-11.28)

b = 800 DWI

43.73 ± 17.27

−1.58 ± 5.71

0.086

(−12.77-9.61)

  1. Abbreviation: CT Computed tomography, T2WI T2-weighted imaging b diffusion-sensitive gradient b value.