颅内动脉成窗变异的MRA诊断分析.doc

颅内动脉成窗变异的MRA诊断分析.doc颅内动脉成窗变异的MRA诊断分析
【摘要】目的 通过磁共振三维时间飞跃法（3D-T0F）,探讨颅内 动脉成窗变异磁共振血管造影（MRA）的发生率、好发部位及其临床意义。 方法 收集行颅颈部磁共振3D-T0F检查的患者资料1445例，将原始图像 经工作站处理，得到最大密度投影（MIP）和容积重组（VR）图像，分 析颅内动脉成窗变异的影像学特点。结果1445例病例中，发现颅内动脉 成窗变异38例（检出率2. 63%, 38/1445）,其中位于基底动脉16例（检 出率1. 11%, 16/1445）；大脑前动脉12例（检出率0. 83%, 12/1445）；
椎动脉6例（检出率0. 42%, 6/1445）；大脑后动脉3例（%,
3/1445）；大脑中动脉1例（检出率0. 07%, 1/14451 ）0 38例成窗变异病
例中有1例合并动脉瘤。结论 磁共振3D-T0F能清楚显示和诊断颅内动脉 成窗变异这一少见血管异常。
【关键词】磁共振血管造影；发育异常；颅内动脉
[Abstract] Objective To explore the incidence, predilection site, and clinical significance of intracranial artery window-type variation magnetic resonance angiography (MRA), through magnetic resonance three dimensional time of flight (3D-T0F) • Methods The data of 1445 patients, who underwent magnetic resonance 3D-T0F, were collected. The images of maximum intensity projection (MIP) and volume reformation (VR ) were showed after processing of
workstation in the original images・ Imaging characteristics of intracranial artery window-type fenestration were analyzed・ Results Among the 1445 cases, there were 38 cases with intracranial artery window一type variation (detection rate as 2. 63%, 38/1445),
and 16 of them in the basilar artery (detection rate as 1. 11%, 16/1445), 12 cases in the anterior cerebral artery (detection rate
as 0. 83%, 12/1445), 6 cases in the vertebral artery (detection
rate as %, 6/1445), 3 cases in the poste