Calculation of the 8-point aphasia improvement scorea
| Variables | Points | |
|---|---|---|
| Aphasia score on admission NIHSS examination | 1–3 | |
| Proximal cerebral artery occlusion | Absent | 0 |
| on admission CTA | Present | 2 |
| rCBF of the sublobar insular ribbon | >1.5 | −2 |
| (lower third) | 0.66–1.5 | 0 |
| 0.34–0.66 | 1 | |
| <0.34 | 2 | |
| rCBF of angular gyrus GM (BA 39) | >0.66 | 0 |
| ≤0.66 | 1 |
a The aphasia outcome score is the sum of all points based on the admission language component of the NIHSS score, CTP (2 regions), and the presence or absence of CTA primal intracranial occlusion. Note that an rCBF > 1.5 corresponds to a region of marked hyperemia compared with the baseline normal cerebral blood flow in the rCBF of that region.