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Insights into Imaging

Table 4 Receiver operating characteristic curves of quantitative parameters for the differential diagnosis of creeping fat with inactive and active Crohn’s disease

From: CT energy spectral parameters of creeping fat in Crohn’s disease and correlation with inflammatory activity

Quantitative parameter

AUC

Threshold

Sensitivity (%)

Specificity (%)

λHU (HU/keV) at the enteric phase

0.93 (0.81–0.99)

0.20

92.31 (74.9–99.1)

85.71 (57.2–98.2)

NFIC at the enteric phase

0.84 (0.69–0.94)

1.05

69.23 (48.2–85.7)

92.86 (66.1–99.8)

NFWC at the enteric phase

0.92 (0.79–0.98)

–0.13

92.31 (74.9–99.1)

85.71 (57.2–98.2)

NFVF at the enteric phase

0.86 (0.71–0.95)

0.59

84.62 (65.1–95.6)

78.57 (49.2–95.3)

  1. λHU, slope of the spectral Hounsfield unit curve; NFIC, normalised fat-iodine concentration; NFWC, normalised fat–water concentration; HU, Hounsfield unit; NFVF, normalised fat volume fraction; AUC, area under the curve
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