Table 3.

Results of image quality evaluation

	Reader 1				Reader 2			Reader 3			Overall		Agreement
	Cor. Diff. Median (IQR)	Uncor. Diff. Median (IQR)	Wilcoxon-rank-sum test	Cor. Diff. Median (IQR)	Uncor. Diff. Median (IQR)	Wilcoxon-rank-sum test	Cor. Diff. Median (IQR)	Uncor. Diff. Median (IQR)	Wilcoxon-rank-sum test	Cor. Diff. Median (IQR)	Uncor. Diff. Median (IQR)	Wilcoxon-rank-sum test	ICC
Naturality	3 (3–4)	3 (2–3)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	3 (3–4)	3 (3–3)	p < 0.001	0.53
Contrast	3 (3–4)	3 (2–4)	p = 0.014	4 (4–4)	3 (3–3)	p < 0.001	3 (3–4)	3 (3–3)	p = 0.017	4 (3–4)	3 (3–3)	p < 0.001	0.43
Artifacts	3 (3–4)	3 (2–3)	p < 0.001	3 (3–4)	3 (2–3)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	3 (3–4)	3 (2–3)	p < 0.001	0.60
IQ	3 (3–4)	3 (2–3)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	3 (3–4)	3 (3–3)	p < 0.001	3 (3–4)	3 (3–3)	p < 0.001	0.51
IC	4 (4–4)	3 (3–4)	p < 0.001	4 (4–4)	3 (3–4)	p < 0.001	4 (3–4)	3 (3–4)	p < 0.001	4 (3–4)	3 (3–4)	p < 0.001	0.57
DC	4 (3–4)	3 (3–3)	p < 0.001	4 (4–4)	3 (3–3)	p < 0.001	4 (3–4)	3 (3-3)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	0.63
Frontal D	4 (3–4)	2 (2–3)	p < 0.001	3 (3–4)	2 (2–3)	p < 0.001	4 (3–4)	2 (2–3)	p < 0.001	4 (3–4)	2 (2–3)	p < 0.001	0.75
Temporal D	4 (3–4)	2 (2–3)	p < 0.001	4 (3–4)	2 (2–3)	p < 0.001	4 (4–4)	3 (3–3)	p < 0.001	4 (4–4)	3 (2–3)	p < 0.001	0.61
Occipital D	4 (4–4)	3 (3–4)	p < 0.001	4 (4–4)	3 (3–4)	p = 0.001	4 (4–4)	3 (3–4)	p < 0.001	4 (4–4)	3 (3–4)	p < 0.001	0.61
Brainstem D	4 (4–4)	3 (3–4)	p < 0.001	4 (4–4)	3 (3–4)	p < 0.001	4 (3–4)	3 (3–3)	p < 0.001	4 (4–4)	3 (3–4)	p < 0.001	0.69

Cor. Diff. corrected diffusion, Uncor. Diff. uncorrected diffusion, IQ image quality, DC diagnostic confidence, IC ischemia conspicuousness, D distortion, IQR interquartile range, ICC interclass coefficient