- •M1 segment occlusion covering the lenticulostriate arteries (LSA) is mostly associated with basal ganglia (BG) infarction.
- •Ischemic tolerance of BG is limited due to supposed lack of collateral supply.
- •However, in a substantial number of patients basal ganglia viability can be observed despite prolonged occlusion of the LSA.
- •Predictors for basal ganglia viability were CT collateralization score and rCBV ratio values
- •This findings might indicate a collateralization of the BG that is not depictable by radiological imaging modalities
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