| 0 |
No Occlusion |
|
|
No Occlusion |
| 1- MCA |
MCA occlusion M3 segment |
|
|
MCA occlusion M3 segment |
| 1 - ACA |
ACA occlusion A2 or distal segments |
|
|
ACA occlusion A2 or distal segments |
| 1 - BA/VA |
One BA/VA branch occlusion |
|
|
One BA/VA branch occlusion |
| 2 - MCA |
MCA occlusion M2 segment |
|
|
MCA occlusion M2 segment |
| 2 - ACA |
ACA occlusion A1 and A2 segments |
|
|
ACA occlusion A1 and A2 segments |
| 2 - BA/VA |
Two or more BA/VA branch occlusions |
|
|
Two or more BA/VA branch occlusions |
| 3A |
MCA occlusion M1 segment with lentriculostriate arteries spared and/or leptomeningeal collaterals visualized |
|
|
MCA occlusion M1 segment with lentriculostriate arteries spared and/or leptomeningeal collaterals visualized |
| 3B |
MCA occlusion M1 segment with no sparing of lentriculostriate arteries nor leptomeningeal collaterals visualized |
|
|
MCA occlusion M1 segment with no sparing of lentriculostriate arteries nor leptomeningeal collaterals visualized |
| 4A-ICA |
ICA occlusion with collaterals filling MCA |
|
|
ICA occlusion with collaterals filling MCA |
| 4A-BA |
BA occlusion with partial anterograde filling |
|
|
BA occlusion with partial anterograde filling |
| 4B-ICA |
ICA occlusion with collaterals filling ACA |
|
|
ICA occlusion with collaterals filling ACA |
| 4B - BA |
BA occlusion with partial retrograde filling |
|
|
BA occlusion with partial retrograde filling |
| 5 - ICA |
ICA occlusion with no collaterals |
|
|
ICA occlusion with no collaterals |
| 5 - BA |
BA occlusion with no filling either directly or via collaterals |
|
|
BA occlusion with no filling either directly or via collaterals |