【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。更多还原

【Abstract】 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) mm, 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.更多还原