Intravoxel incoherent motion and ADC measurements for differentiating benign from malignant thyroid nodules: utilizing the most repeatable region of interest delineation at 3.0 T

Table 1 Distribution of IVIM parameters derived from W-L ROI and an S-S ROI

	Reader 1 (n = 46)	Reader 2 first session (n = 46)	Reader 2 s session (n = 46)	Total (n = 138)	F	P^b
D_(W-L)	0.981 ± 0.375	0.973 ± 0.382	0.978 ± 0.366	0.977 ± 0.371	0.092	0.912
f_(W-L)	0.352 ± 0.089	0.339 ± 0.093	0.332 ± 0.088	0.341 ± 0.090	0.077	0.926
D^a _(W-L)	11.178 ± 2.098	11.231 ± 2.242	11.193 ± 1.983	11.201 ± 2.095	0.168	0.845
D_(S-S)	1.106 ± 0.525	1.005 ± 0.430	0.989 ± 0.446	1.034 ± 0.468	1.395	0.252
f_(S-S)	0.295 ± 0.126	0.299 ± 0.144	0.319 ± 0.111	0.304 ± 0.127	1.502	0.226
D^a_(S-S)	11.126 ± 4.212	11.060 ± 4.069	10.507 ± 4.230	10.898 ± 4.150	0.158	0.854

W-L ROI (whole-lesion region of interest), S-S ROI (single-section region of interest), D (× 10^− 3 mm²/s), D^a (× 10^− 3 mm²/s)
Data are presented as the mean ± standard deviation. ^bOne-way ANOVA. F represents the statistical value

ISSN: 1470-7330