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Table 1: 
Aneurysm detection: diagnostic performance of CT angiography on a per-aneurysm basis
ReaderSensitivity, % (n/N)Specificity, % (n/N)Positive Predictive Value, % (n/N)Negative Predictive Value, % (n/N)
Reader 192.5 (62/67)100 (6/6)100 (62/62)54.5 (6/11)
Reader 294 (63/67)100 (6/6)100 (63/63)60 (6/10)
Reader 394 (63/67)85.7 (6/7)98.4 (63/64)60 (6/10)
Reader 495.5 (64/67)75 (6/8)97 (64/66)66.7 (6/9)
  • Note:—Numbers in parentheses indicate numbers of aneurysms.