TABLE 5:

Diagnostic performance of various CT angiographic MPR analysis methods for assessment of degree of stenosis in carotid arteries compared with DSA

MPR Analysis Method	Observer	Sensitivity (%)	Specificity (%)	Overall accuracy (%)
Cross-sectional	1	73 (22/30)	80 (32/40)	77 (54/70)
	2	77 (23/30)	98 (39/40)	88 (62/70)
Sagittal	1	87 (26/30)	70 (28/40)	77 (54/70)
	2	87 (26/30)	95 (38/40)	91 (65/70)
Combined*	1	87 (26/30)	70 (28/40)	77 (54/70)
	2	90 (27/30)	95 (38/40)	93 (66/70)

Note.—Numbers in parentheses are numbers of arteries. A 50% stenosis was the cutoff point for a hemodynamically significant finding.

^*Combined MPR was considered to be positive when either of the MPR (cross-sectional or oblique sagittal) measurements yielded a positive result.