三维动态增强磁共振血管成像技术显示脊髓Adamkiewicz动脉  

Imaging of the artery of adamkiewicz by using three-dimensional dynamic contrast-enhanced magnetic resonance angiography

作　　者：曾燕[1] 赵建农[1] 谢微波[1] 陈维娟[1] 李杰[1] 沈霞[1] 

机构地区：[1]重庆医科大学附属第二医院放射科,重庆400010

出　　处：《重庆医科大学学报》2006年第4期575-578,共4页Journal of Chongqing Medical University

摘　　要：目的:探讨三维动态增强磁共振血管成像技术(3D-DCE MRA)显示脊髓Adamkiewicz动脉(AKA)的最佳扫描参数、扫描延迟时间及图像重建方法。方法:17例行胸、腰椎MRI检查,发现有脊髓、椎体或附件病变而需行MRI增强检查的病例,利用test bolus技术来预测对比剂注射延迟时间,采用3D-DCE MRA技术和各种图像后处理方法来显示脊髓AKA。结果:3D-DCE MRA的扫描参数为TR/TE 5.3/1.4,翻转角35°,扫描层厚1.4 mm,重建层厚0.7mm,K空间采用椭圆填充技术,FOV43cm×22cm,覆盖范围包括T5～L4的区域。MPR和MIP在显示脊髓AKA方面具有优势。结论:采用优化的扫描参数和恰当的图像重建技术,3D-DCE MRA能清晰显示脊髓AKA,可作为无创性血管成像的首选检查。Objective： Using three-dimensional dynamic contrast-enhanced magnetic resonance angiography （3D-DCE MRA） to visualize the artery of Adamkiewicz （AKA）, and to investigate the optimized scanning parameters, scan delay time and image post-processing methods. Methods： 17 patients with lesions of the spinal cord or vertebrae underwent contrast-enhanced MR angiography of the thoracoabdominal aorta. Test bolus was used to predict the scan delay time, 3D-DCE MRA technique and various image post-processing methods were applied to visualize the artery of AKA. Results： The scanning parameters were as follows： TR/TE 5.3/1.4, flip angle 35° , slice thickness was 1.4 mm with reconstruction interval of 0.7 mm. The K-space was filled by using an elliptic-centric order. FOV 43cm × 22cm. Scanning coverage was from the level of T5 to L4. Muhiplannar projection reconstruction （MPR） and maximum intensity projection （MIP） were advantageous in depicting AKA. Conclusion： Using the optimized scanning and reconstruction techniques, 3D-DCE MRA is able to depict AKA clearly. As a noninvasive imaging technique, optimized 3D-DCE MRA should therefore be the method of choice for the depiction of AKA.

关 键 词：ADAMKIEWICZ动脉 核磁共振 MR血管成像 

分 类 号：R814[医药卫生—影像医学与核医学]