FIGURE.

Examples of the multisegment clot sign on dynamic CT angiography derived from CT perfusion. A, One patient with LAA had 1 clot (black dot) presenting as 1 segment in the middle cerebral artery, which was categorized as a 1-segment clot. B, One patient with CE had 2 segments of the clot on a delayed phase of dynamic CTA, which was categorized as a multisegment clot. C, Another patient with CE had 2 segments of the clot on a late delayed phase of dynamic CTA, which was also categorized as a multisegment clot.