Gemstone Spectral CT Virtual Noncontrast Images and Iodine Maps for the Characterization of Thyroid Lesions and Distinguishing Thyroid Papillary Carcinoma from Nodular Goiter
Table 1
Patient characteristics and radiation dose.
Variable
Total number of lesions (n = 66)
Nodular goiter (n = 24)
Papillary carcinoma (n = 42)
value
Patient age (y)
47.18 ± 15.17
55.96 ± 10.50
42.17 ± 15.23
<0.001a
Male (y)
42.44 ± 18.83
58.57 ± 10.83
29.89 ± 13.11
<0.001a
Female (y)
48.70 ± 13.67
54.88 ± 10.51
45.52 ± 14.15
0.020a
Sex
Male
11 (16.67%)
3 (12.50%)
8 (19.05%)
0.731b
Female
55 (83.33%)
21 (87.50%)
34 (80.95%)
Transverse diameter (cm)
TNC
2.62 ± 1.58
3.29 ± 1.80
2.24 ± 1.32
0.009a
VNC
2.66 ± 1.55
3.32 ± 1.68
2.28 ± 1.35
0.008a
Anterior-posterior diameter (cm)
TNC
2.06 ± 1.30
2.72 ± 1.52
1.68 ± 0.98
0.005a
VNC
2.08 ± 1.26
2.77 ± 1.47
1.69 ± 0.92
0.003a
CTDIvol (mGy)
TNC
15.51 ± 2.19
15.21 ± 2.42
15.68 ± 2.06
0.405a
Routine arterial phase
21.76 ± 2.28
21.59 ± 2.82
21.86 ± 1.94
0.685a
GSI venous phase
10.30 ± 0.00
10.30 ± 0.00
10.30 ± 0.00
0.999a
DLP (mGy.cm)
TNC
403.81 ± 86.19
390.14 ± 86.38
411.63 ± 86.14
0.334a
Routine arterial phase
569.74 ± 71.81
556.97 ± 83.81
577.04 ± 63.90
0.316a
GSI venous phase
267.50 ± 32.19
269.78 ± 31.99
266.20 ± 32.62
0.667a
Thyroid lesions
0.030b
Unilateral
44 (66.67%)
12 (50.00%)
32 (76.19%)
Bilateral
22 (33.33%)
12 (50.00%)
10 (23.81%)
Note. The results are the measurements with a corresponding ratio in the parentheses, and the remainder of the results is mean ± standard deviation. : student’s t-test and : chi-squared test. TNC: true noncontrast, VNC: virtual noncontrast, CTDIvol: volume CT dose index, and DLP: dose-length product.