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

Table 4

Quantitative analysis of TNC and VNC between papillary carcinoma and nodular goiter.

Variable	Papillary carcinoma	Nodular goiter	value
TNC attenuation (HU)	51.02 ± 10.69	57.33 ± 14.99	0.078
VNC attenuation (HU)	47.55 ± 7.79	49.75 ± 11.18	0.400
Absolute attenuation (HU)	7.86 ± 6.74	13.43 ± 10.53	0.026
Iodine density (100 μg/cm^3)	31.45 ± 8.51	37.27 ± 10.34	0.016
Iodine/VNC ratio	0.68 ± 0.27	0.76 ± 0.24	0.242

Note. : student’s t-test. TNC: true noncontrast and VNC: virtual noncontrast.