摘要
目的 探讨 3DTOFMRA诊断颅内动脉瘤的价值。材料与方法 经手术治疗 3 6例颅内动脉瘤患者 ,均用 1.5T超导MR系统 3DTOF法作MRA检查 ,其中 3 1例经DSA检查。MRA显示动脉瘤的部位、大小、形态、动脉瘤颈以及瘤体与载瘤血管的关系并与DSA进行比较分析。结果 3 6例共 3 6个动脉瘤 ,MRA检查发现 3 3个 ,敏感性 91.7%。大小 2～ 2 7mm。MRA显示动脉瘤的部位、大小和形态同DSA基本一致。综合观察靶MIP、MPR和原始像能清楚显示 3 3个瘤颈和瘤体与载瘤血管的关系 ;而单用MIP能显示 2 6个 ( 2 6/3 3 ,78.8% )瘤颈和 2 9个 ( 2 9/3 3 ,87.9% )载瘤血管。DSA能显示 2 8个 ( 2 8/3 1,90 .3 % )载瘤血管。 5例仅经MRA检查确诊后直接手术治疗。结论 3DTOFMRA诊断颅内动脉瘤具有较高的敏感性和特异性。有时综合MIP、MPR和原始像评价瘤颈和载瘤血管优于DSA。典型的动脉瘤经 3DTOFMRA诊断后可直接手术治疗。
Objective To evaluate 3D TOF MRA in diagnosing cerebral aneurysms.Materials and Methods 3D TOF MRA was performed, using a 1.5T superconductive MR unit, in 36 cases with cerebral aneurysm, of which 31 cases underwent additional DSA. The findings on MRA and DSA, including the site, size, shape, neck and parent vessels of the aneurysms, were compared.Results Of 36 patients with cerebral aneurysm, 33 were detected by MRA, with a sensitivity of 91.6% and size of 2～27mm. 3D TOF MRA was basically the same as DSA in showing the site, size and shape of the aneurysms. When target MIP, MPR and source images were combined in observation, the aneurysmal neck and parent vessel in all 33 cases could be well identified, while only 26 necks (81.8%) and 29 parent vessels (87.9%) could be identified with MIP alone. DSA revealed 28 (28/31, 90.3%) parent vessels. Five cases underwent surgery when the diagnosis was confirmed by MRA.Conclusion 3D TOF MRA has high sensitivity and specificity in detecting cerebral aneurysm. Combination of MIP, MPR and source images will be superior to DSA in demonstrating aneurysmal neck and parent vessels.
出处
《临床放射学杂志》
CSCD
北大核心
2000年第8期474-477,共4页
Journal of Clinical Radiology
