. 2021 Feb;11(2):521–532. doi: 10.21037/qims-20-2

Table 5. Inter-reader correlation with solitary pulmonary nodules differentiation.

	CT_AP40keV (HU)	CT_VP40keV (HU)	λ_APHU	λ_VPHU	NIC_AP	NIC_VP	NAEF
ICC (95% CI)	0.86 (0.81–0.90)	0.85 (0.79–0.89)	0.86 (0.81–0.90)	0.82 (0.76–0.87)	0.87 (0.83–0.91)	0.83 (0.77–0.88)	0.84 (0.78–0.89)

ICC, intraclass correlation coefficient; CT_AP40keV, the value of 40 keV monochromatic images in the arterial phase; λ_APHU, the slope of the spectral HU curve in the arterial phase; NIC_AP, the normalized iodine concentration in the arterial phase; CT_VP40keV, the value of 40 keV monochromatic images in the venous phase; λ_VPHU, the slope of the spectral HU curve in the venous phase; NIC_VP, the normalized iodine concentration in the venous phase; NAEF, normalized arterial enhancement fraction; HU, Hounsfield unit.