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Diagnostic imaging markers associated with hematoma expansion in intracerebral hemorrhage. The various signs associated with hematoma expansion indicated by white arrows in each panel. Spot sign is seen on computed tomography angiography (CTA), the others are found on non-contrast computed tomography head (CTH). (A) Spot sign; (B) island sign; (C) satellite sign; (D) black hole sign; (E) swirl sign; (F) blend sign.
