Table 5:
Stenosis quantification
| CA Stenosis | Number of Lesions on CA | MRA Agreement Lesions | MRA Falsely Upgraded Lesions | MRA Falsely Downgraded Lesions | MRA False-Negatives |
|---|---|---|---|---|---|
| <50% | 20 | 4 (20%) | 7 (35%) | 9 (45%) | |
| 50–<75% | 25 | 12 (48%) | 6 (24%) | 1 (4%) | 6 (24%) |
| 75–99% | 9 | 7 (78%) | 1 (11%) | 1 (11%) | |
| 100% | 8 | 1 (13%) | 4 (50%) | 3 (38%) |
Note:— MRA indicates MR angiography; CA, conventional angiography. Total MRA agreement is 43 lesions, excluding 2 aneurysms. Number of lesions correctly graded or up- and downgraded by MRA when compared with CA (n = 62 CA lesions; excludes 2 aneurysms)