3.0T磁共振全心方法冠状动脉造影的初步评价  

Whole-heart turbo-field-echo coronary MR angiography at 3 Tesla: initial experience

作　　者：高波[1] 郭启勇[1] 侯阳[1] 孙红彬[1] 

机构地区：[1]中国医科大学附属第二医院放射科,辽宁沈阳110004

出　　处：《中国医学影像技术》2006年第3期377-379,共3页Chinese Journal of Medical Imaging Technology

摘　　要：目的初步评价三维(3D)全心方法冠状动脉造影在3.0T磁共振应用的可行性及价值。方法采用3D分段k空间快速梯度回波序列(turbofieldecho,TFE),实时呼吸导航门控技术,心电向量(VCG)R波触发门控技术,在3.0T磁共振对12例健康志愿者进行磁共振冠状动脉造影(MRCA)检查。结果左主干和左前降支(LM+LAD)、左旋支(LCX)及右冠状动脉(RCA)的血管长度(mm)分别为98±16、56±9、108±29;血管直径(mm)分别为2.6±0.4、2.4±0.3、2.6±0.3;左、右冠状动脉的信噪比(SNR)和强化噪声比(CNR)分别为35±12、19±6和23±5、18±3。结论初步研究显示全心方法MRCA在3.0T磁共振是可行的,能够显示冠状动脉的远段和管径较小的分支血管,显示了增强的信噪比。全心方法使冠状动脉定位采集过程变得简单,易操作。Objective To evaluate the feasibility and the value of whole-heart magnetic resonance coronary angiography （MRCA） at 3 Tesla. Methods Whole-heart MRCA was performed in 12 healthy volunteers by using a three-dimensional segmented k-space gradient echo imaging sequence （turbo field echo） with free breathing. Visible vessel length, vessel diameter, signal-to-noise ratio （SNR）, and contrast-to-noise ratio （CNR） were determined for each vessel. Results The average length of the combined left main （LM） and left anterior descending branches （LAD） was （98±16） ram, of the left circumflex branch （LCX） was （56±9） mm, and of the right coronary （RCA） was （108±29） mm. The proximal diameters of the LAD, LCX, and RCA were （2.6±0. 4） mm, （2.4±0. 3） mm, and （2.6±0. 3） mm, respectively. SNR and CNR were 35 ±12 and 19±6 for the left versus 23±5 and 18±3 for the right coronary system, respectively. Conclusion This preliminary study demonstrates that whole-heart MRCA. is feasible at 3 Tesla. The main vessels, including their distal segments and smaller-diameter branching vessels can be displayed.

关 键 词：磁共振血管造影术 冠状动脉 梯度回波序列 

分 类 号：R445.2[医药卫生—影像医学与核医学] R543.3[医药卫生—诊断学]