Fig 2.

Graph depicts the penumbra-infarct mismatch (penumbra / [penumbra + infarct] ratio). The value measured for 80-mm z-axis coverage was considered as the criterion standard, and the values measured at shorter levels of z-axis coverage are expressed in percentages of the 80-mm z-axis coverage criterion standard value. For shorter levels of z-axis coverage, the penumbra-infarct mismatch is grossly overestimated compared with 80-mm z-axis coverage. For 30-mm z-axis coverage, the mismatch is accurately estimated for 50% (p50) of the patients, but 70-mm z-axis coverage is required to assess the penumbra-infarct mismatch accurately.