Gemstone Spectral CT Virtual Noncontrast Images and Iodine Maps for the Characterization of Thyroid Lesions and Distinguishing Thyroid Papillary Carcinoma from Nodular Goiter
Table 2
Qualitative analysis of the characterization of thyroid lesions between VNC images and TNC images.
VNC (n = 66)
TNC (n = 66)
k
value
Calcification
0.85
<0.001
Negative
35 (53.03%)
30 (45.45%)
Positive
31 (46.97%)
36 (54.55%)
Necrosis
0.96
<0.001
Negative
47 (71.21%)
48 (72.73%)
Positive
19 (28.79%)
18 (27.27%)
Lesion boundary
0.76
<0.001
Clear
36 (54.55%)
42 (63.64%)
Unclear
30 (45.45%)
24 (36.36%)
Thyroid edge interruption
1.00
<0.001
Absent
30 (45.45%)
30 (45.45%)
Present
36 (54.55%)
36 (54.55%)
Lymph node metastasis
0.94
<0.001
Negative
57 (86.36%)
56 (84.85%)
Positive
9 (13.64%)
10 (15.15%)
Note. k and values were computed with the kappa statistic. TNC: true noncontrast and VNC: virtual noncontrast.
