Chong W K W, Lee S K, Terbrugge K G
Division of Neuroradiology, Department of Medical Imaging, University of Toronto,Toronto Western Hospital, Canada Diagnostic Imaging, Monash Medical Centre, Locked Bag No. 29, Clayton, Victoria 3168, Australia -
Interv Neuroradiol. 2006 Sep 15;12(3):215-21. doi: 10.1177/159101990601200303. Epub 2006 Dec 13.
We aimed to show the anatomical relationship between a dissecting aneurysm of the posterior cerebral artery (PCA) and tentorial free edge to understand the pathophysiologic mechanism. A 52-year-old woman with a history of head trauma presented with dizziness and numbness in her left fingers. 3D DSA showed a dissecting aneurysm of the right P2-P3 segment of PCA. The fusion of 3D DSA and 3T MRI was performed at the dedicated workstation using three pairs of landmarks including the ICA termination, MCA bifurcation and A1-A2 junction of the right ACA. Fusion of 3D DSA and 3T MRI clearly demonstrated the dissected segment of PCA crossed the tentorial free edge twice. The fusion images support the direct trauma hypothesis of dissecting aneurysm of the P2-P3 segment of PCA. This novel imaging technique shows future potential to be used to understand the anatomical relationships between various vascular lesions and surrounding structures.
我们旨在展示大脑后动脉（PCA）夹层动脉瘤与小脑幕游离缘之间的解剖关系，以了解其病理生理机制。一名有头部外伤史的52岁女性出现头晕及左手手指麻木症状。三维数字减影血管造影（3D DSA）显示PCA右侧P2-P3段存在夹层动脉瘤。在专用工作站使用包括右侧颈内动脉终末段、大脑中动脉分叉处及右侧大脑前动脉A1-A2交界处在内的三对标志点，对3D DSA和3T磁共振成像（3T MRI）进行融合。3D DSA与3T MRI的融合清晰显示PCA的夹层段两次穿过小脑幕游离缘。融合图像支持PCA P2-P3段夹层动脉瘤的直接创伤假说。这种新型成像技术显示出未来用于了解各种血管病变与周围结构之间解剖关系的潜力。
