Table 3:

Qualitative image analysis^a

	Non-SEMAR	SEMAR	P Value	κ Value
				Non-SEMAR	SEMAR
The severity of metallic artifacts	1.2 ± 0.4	2.9 ± 0.2	<.01	0.53 (5)	0.65 (1)
Visibility of structures
Electrode localization	1.5 ± 0.6	3.5 ± 0.5	<.01	0.62 (8)	0.53 (8)
Basal ganglia	1.2 ± 0.4	3.0 ± 0.4	<.01	0.57 (5)	0.61 (5)
Thalamus	1.1 ± 0.3	2.8 ± 0.5	<.01	0.63 (2)	0.66 (5)
Cortico-medullary junction	1.8 ± 0.3	3.4 ± 0.5	<.01	0.51 (7)	0.72 (5)
Sylvian fissure	2.1 ± 0.7	3.7 ± 0.5	<.01	0.58 (8)	0.58 (6)
Lateral ventricle	2.0 ± 0.5	3.8 ± 0.4	<.01	0.70 (4)	0.53 (9)
Third ventricle	1.6 ± 0.5	3.2 ± 0.7	<.01	0.56 (7)	0.58 (6)
Background image quality
GM-WM contrast	3.2 ± 0.6	3.3 ± 0.6	.11	0.60 (8)	0.68 (7)
Image noise	3.2 ± 0.4	3.2 ± 0.4	.32	0.61 (4)	0.53 (4)
Overall diagnostic confidence	1.4 ± 0.5	3.1 ± 0.4	<.01	0.52 (8)	0.56 (4)

^aData are means. Parentheses show the number of cases for which the subjective score before consensus reading was disputed by both readers. Scale for subjective score: 1 = undiagnostic, 2 = suboptimal, 3 = acceptable, 4 = fully diagnostic.