Table 3 MRA and HRMRI findings of CCAD at different stages
Differ-ent stages | MRA findings | The typical sign detectio-n of CCAD | HR-MRI findings | The typical sign detection of CCAD | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
intimal flap or double lumen | irregular vessel wall directio-n | aneurys-mal dilatation or fusiform dilatation | tapered stenosis or occlusi-on | intimal flap | double lumen | aneurys-mal protrusi-on | IMH | grading of vessel wall enhancement | |||||
Level 0 | Level 1 | Level 2 | |||||||||||
Acute stage (5) | 1 (12.5) | 5 (62.5) | 3 (37.5) | 6 (75.0) | 3 (37.5) | 2 (25.0) | 3 (37.5) | 1 (12.5) | 7 (87.5) | 0 (0.0) | 0 (0.0) | 8(100.0) | 8(100.0) |
Subac-ute stage (7) | 1 (12.5) | 6(75.0) | 4 (50.0) | 3 (37.5) | 4 (50.0) | 5 (62.5) | 4 (50.0) | 4 (50.0) | 5 (62.5) | 0 (0.0) | 3 (42.9) | 5 (62.5) | 8 (100.0) |
Chroni-c stage (22) | 10 (45.5) | 13 (59.1) | 12 (54.5) | 2 (9.1) | 12 (54.5) | 11 (50.0) | 10 (45.5) | 13 (59.1) | 2 (9.1) | 8 (36.4) | 12 (54.5) | 2 (9.1) | 13 (59.1) |
p value | 0.180 | 0.896 | 0.902 | 0.001 | 0.902 | 0.368 | 1.000 | 0.095 | 0.000 | / | / | 0.000 | 0.016 |