Gemstone Spectral CT Virtual Noncontrast Images and Iodine Maps for the Characterization of Thyroid Lesions and Distinguishing Thyroid Papillary Carcinoma from Nodular Goiter

Table 3

Quantitative analysis of the attenuation of thyroid lesions between VNC and TNC images.

	VNC	TNC	r^a (95 CI%)	value	value
Attenuation (HU)
Papillary carcinoma	51.02 ± 10.69	47.55 ± 7.79	0.47 (0.20, 0.68)	<0.001	0.093
Nodular goiter	57.33 ± 14.99	49.75 ± 11.18	0.33 (−0.08, 0.65)	0.116	0.053

Note. ^ar and corresponding value were computed using Spearman’s correlation test; value was computed using student’s t-test. TNC: true noncontrast and VNC: virtual noncontrast.