Department of Radiology, Tokyo Women's Medical University Medical Center East, Arakawa-ku, Japan.
Jpn J Radiol. 2010 Nov;28(9):680-3. doi: 10.1007/s11604-010-0469-2. Epub 2010 Nov 27.
Our patient was diagnosed with acute subarachnoid hemorrhage on plain head computed tomography (CT). Multiphase dynamic contrast-enhanced CT angiography on a 64-row multidetector scanner revealed a large aneurysm in the left middle cerebral artery that was not detected on conventional helical CT angiography. We believed that increased intracranial pressure and rough thrombus within the aneurysm delayed its peak enhancement. Our case demonstrates the diagnostic utility of four-dimensional CT with multiphase volume data in cases of lesions with delayed enhancement.
我们的患者在常规头部 CT 平扫时被诊断为急性蛛网膜下腔出血。64 排多层螺旋 CT 血管造影多期动态增强显示左侧大脑中动脉有一个大动脉瘤，而常规螺旋 CT 血管造影未发现该动脉瘤。我们认为颅内压增高和动脉瘤内粗糙血栓导致其峰值强化延迟。本病例表明，对于延迟强化的病变，使用多期容积数据的四维 CT 具有诊断价值。
