Table 1.
Scoring systems used for the evaluation of collateral status
| Score | sp Menon score [14] | mp Menon score [13] | mod mp Menon score [23] | rLMC score [9] | ||
|---|---|---|---|---|---|---|
| Description | Beyond the occluded artery within the symptomatic and compared with the asymptomatic contralateral hemisphere, there is/are: | When compared to a matching region in the contralateral hemisphere, there is/a re: | ||||
| Region | ACA-MCA-region | MCA-PCA-region | ASPECTS region M1-6, Sylvian sulcus, ACA, basal ganglia | |||
| Normal/increased prominence and extent of pial vessels | No delay and normal/increased prominence and extent of pial vessels | No delay and normal/increased prominence and extent of pial vessels | Excellent (5) | Excellent (5) | Equal/more prominent lenticulostriate/pial vessels (2) | |
| Slightly reduced prominence and extent of pial vessels | One-phase delay in filling in of peripheral vessels, but prominence and extent is the same | Delay in filling in of peripheral vessels, but prominence and extent is the same | Good (4) | Good (4) | Less prominent lenticulostriate/pial vessels (D | |
| Moderately reduced prominence and extent of pial vessels | Two-phase delay in filling in of peripheral vessels or one-phase delay and significantly reduced number of vessels | Delay in filling in of peripheral vessels and significantly reduced number of vessels | Fair (3) | Fair (3) | No lenticulostriate/pial vessels (0) | |
| Decreased prominence and extent of pial vessels | Two-phase delay in filling in of peripheral vessels and decreased prominence and extent or one-phase delay and some ischemic regions with no vessels | Delay in filling in of peripheral vessels and decreased prominence and extent as well as some ischemic regions with no vessels | Poor (2) | Poor (2) | ||
| Just a few vessels visible | Just a few vessels visible in any phase | Just a few vessels visible | Minimal (1) | Minimal (1) | ||
| No vessels visible | No vessels visible in any phase | No vessels visible | None (0) | None (0) | ||
| Maximum score | 10 | 10 | 10 | 20 | ||
| Used for scoring of | tMIP, spCTA | 3p-mpCTA | 2p-mpCTA | spCTA | ||
sp Menon score, single-phase Menon score; mp Menon score, multi-phase Menon score; mod mp Menon score, modified multi-phase Menon score; rLMC score, regional leptomeningeal collateral score; ACA, anterior cerebral artery; MCA, middle cerebral artery; PCA, posterior cerebral artery; ASPECTS, Alberta Stroke Program Early computed tomography (CT) Score; tMIP, temporal maximum intensity projection; spCTA, single-phase CT angiography; 3p-mpCTA, three-phase multi-phase CT angiography; 2p-mpCTA, two-phase multi-phase CT angiography.