3.0T磁共振检查左心耳的方法和扫描序列  

3.0T MR scanning method and sequence of left atrial appendage

作　　者：孙卫红[1] 胡春艾[1] 陈刚[1] 吕璐璐[1] 

机构地区：[1]徐州市中心医院MR室,江苏徐州221009

出　　处：《中国介入影像与治疗学》2015年第11期700-704,共5页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的探讨左心耳的MR检查定位方法及扫描序列。方法收集接受左心耳MR检查的患者30例,采用Siemens Skyra 3.0T超导MR成像系统,对患者心脏行黑血和(或)亮血多层、多方位扫描,获取左心耳的标准层面,并进行亮血电影序列观察心脏的运动功能,对比剂填充像及充盈像扫描观察对比剂动态填充和充盈情况。于图像工作站对扫描定位及图像质量进行评价。结果 30例患者均未进行心律控制,并在屏气(26例)或自由呼吸(4例)的情况下顺利完成检查,平均检查时长(19±5)min。2D黑血HASTE序列图像优良25例,出现慢血流伪影并影响诊断5例。2D亮血TrueFISP序列图像满足诊断要求28例,出现较重的磁敏感伪影经较准后伪影去除2例。Cine-TrueFISP序列的所有图像均可满足诊断要求,Dynamic-Turbo-FLASH序列图像良好30例,IR-TrueFISP序列图像满足诊断要求30例,其中图像质量优22例。经多序列综合评定,30例患者的图像信息均满足诊断要求。结论在不控制受检者心率、屏气或自由呼吸的情况下,采用3.0T MR高SNR的优势,采用多层、多方位定位及多种快速成像序列,可得到完整显示左心耳的满意图像。Objective To explore the method to locate the left atrial appendage （LAA） and the sequences of MR scan. Methods Thirty patients were performed MR scan of LAA with Siemens Skyra 3.0T MR system. 2D black blood and （or） bright blood were used to obtain the standard level of LAA, then the images of LAA function with Cine-TrueFISP sequence and contrast medium filling and delay imaging of LAA with Dynamic-Turbo-FLASH sequence on the standard level of LAA were obtained. Both scan location and image quality were analyzed with workstation. Results All 30 patients completed examination without heart rate control （26 cases hold breath and 4 cases free breathing）. The average scan time was （19±5）min. The quality of 2D black blood HASTE sequence images were good in 25 cases, while 5 cases had blurred images for slow blood flow artifact and effect on diagnosis. With 2D bright blood TrueFISP sequences, the images of 28 cases matched the diagnosis, while the other finally matched the diagnosis after further scanning to reduce magnetic sensitive artifacts. All images of Cine-True-FISP sequence all satisfied diagnostic requiement. Images of dynamic-Turbo-FLASH sequence were all good. Images of IR-True-FISP sequences reached the needs of diagnostic requiement, including optimal images in 22 cases. Conclusion Rely on the advantages of high SNR of 3.0T MR system, with multi-level and multi-dimensional positioning and a variety of fast imaging sequences, no matter patients hold breath or breath freely, even if without control of heart rate, images of LAA can be gotten satisfied.

关 键 词：磁共振成像 心耳 序列 

分 类 号：R331.31[医药卫生—人体生理学] R445.2[医药卫生—基础医学]