Evolution of Computed Tomography Angiography Spot Sign Is Consistent With a Site of Active Hemorrhage in Acute Intracerebral Hemorrhage

摘要: Background and Purpose—CT angiography spot sign predicts hematoma expansion in patients with acute intracerebral hemorrhage (ICH). The may represent a site of active extravasation, locus arrested forming fibrin globes, or associated epiphenomena such as hypertensive microaneurysms. We sought to describe the evolution signs over 60 seconds ICH using dynamic CT determine whether they grow diffuse into would be expected extravasation. Methods—We prospectively identified consecutive presenting spontaneous <6 hours from symptom onset that completed imaging 60-second acquisition protocol. determined positivity, quantified volumes, then used repeated-measures ANOVA assess changes volume time. Results—We collected data on 35 patients; 13 (37%) were spot-positive. Spot-positive had larger median compa...