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Fig. 11 | Neurovascular Imaging

Fig. 11

From: Multimodality CT based imaging to determine clot characteristics and recanalization with intravenous tPA in patients with acute ischemic stroke

Fig. 11

After identifying a complete occlusion on computed tomographic angiography (CTA; a; white arrow), regions of interest are drawn at the proximal (b), solid white arrow) and distal thrombus interface (B, hollow white arrow) of the thrombus on the CT perfusion (CTP) average map (b). A line profile (white arrow head) is drawn along the silhouette of the artery distal to the thrombus on the CTP-average map. The CTP-average map is then coregistered with the CTP T0 map (c). T0 values vs distance (pixel number) along the line profile are then plotted and the line of best-fit determined (d); T0 values at proximal and distal thrombus interface are also measured. d, In this patient, the presence of a positive artery profile slope suggests the presence of anterograde flow distal to thrombus. Adapted from Ahn et al. Stroke 2015 [45]

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