Schematic shows the 10 regions of the MCA distribution, each of which accounts for one point in the ASPECTS system: M1, M2, M3, M4, M5, M6, the caudate nucleus (C), the lentiform nucleus (L), the internal capsule (IC), and the insular cortex (I). For each area involved in ischemia depicted at unenhanced CT, one point is subtracted from the total score of 10.
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