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.