Table 3.

Reliability Based on Repeat MR Examinations and Readings: Quantitative Variables

Note.—Inter- and intrareader estimates were based on readers reading 20 and 29 identical examinations, respectively (123 and 194 paired vessel segments, respectively), whereas examination estimates were based on readers reading 28 examination pairs (188 paired vessel segments). Measurements were over a fixed length for each vessel segment (supraclinoid internal carotid artery, 6 mm; M1 of middle cerebral artery, 6 mm; A1 of anterior cerebral artery, 6 mm; proximal and distal basilar artery, each 5 mm; and V4 of vertebral artery, 6 mm) and over the entire length of the largest plaque identified for each vascular territory. CI = confidence interval, CV = coefficient of variation, ICC = intraclass correlation coefficient.