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Table 2: 
Accuracy of 64MSCTA on a per-aneurysm/per-patient basis, with κ and ρ per size
Size on DSA/RASensitivity of MSCTA, %Specificity of MSCTA, %PPV of MSCTA, %NPV of MSCTA, %Accuracy of MSCTA, %κ/ρ (CTA versus DSA) Aneurysm Size
Overall97.4/96.090.0/90.097.4/96.090.0/90.095.8/94.30.965/0.967
<4 mm92.3/90.9100.0/100.0100.0/100.090.9/90.995.2/95.60.711/0.753
4–10 mm100.0/100.090.0/90.994.7/92.3100.0/100.095.8/96.40.841/0.861
>10 mm100.0/100.0100.0/100.0100.0/100.0100.0/100.0100.0/100.00.476/0.888
  • Note:—MSCTA indicates multisection CT angiography; DSA, digital subtraction angiography; RA, rotational angiography; κ = κ reliability coefficient, ρ = ρ correlation coefficient; CTA, CT angiography. Data show a per-aneurysm/per-patient percentages.