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Table 2: Comparison of image quality between contrast-enhanced magnetic resonance angiography (CE-MRA) and digital subtraction angiography (DSA)
Vessel Conspicuity Contrast Vessel Continuity Vessel Sharpness Background Homogeneity
Relative score −0.7 ± 1.3 0.3 ± 1.4 −1.5 ± 0.6 −1.6 ± 1.1 −1.5 ± 0.8
T⁺/T⁻ 25.5/96.5 71/34 0/119 0/120 0/114
P value >.05, NS >.05, NS <.001 <.001 <.001
Note:—A negative (positive) score indicates that DSA performs better (worse) than CE-MRA. Mean relative scores are ±1 SD. T values (+ or −) are based on a rank-sums test. NS indicates not significant.

	Vessel Conspicuity	Contrast	Vessel Continuity	Vessel Sharpness	Background Homogeneity
Relative score	−0.7 ± 1.3	0.3 ± 1.4	−1.5 ± 0.6	−1.6 ± 1.1	−1.5 ± 0.8
T⁺/T⁻	25.5/96.5	71/34	0/119	0/120	0/114
P value	>.05, NS	>.05, NS	<.001	<.001	<.001