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Table 3: N/D ratios of aneurysms as measured with DSA and MDCTA
N/D Ratio Reader 1 Reader 2
DSA MDCTA DSA MDCTA
<1/3 23 20 22 20
1/3–2/3 50 51 49 49
>2/3 20 22 22 24
Total 93 93 93 93
Note:–N/D indicates neck-to-dome ratio; DSA, digital subtraction angiography; MDCTA, multidetector row CT angiography.
N/D Ratio	Reader 1		Reader 2
N/D Ratio	DSA	MDCTA	DSA	MDCTA
<1/3	23	20	22	20
1/3–2/3	50	51	49	49
>2/3	20	22	22	24
Total	93	93	93	93