3.0 T MR对比增强全心冠状血管成像对冠状静脉系统的解剖学研究

目的 探讨3.0 T MR对比增强全心冠状血管成像(CE CMRA)对冠状静脉解剖的研究价值.方法 43例受试者行3.0 T CE CMRA,采用自由呼吸导航门控、心电触发和非选择性反转恢复(IR)准备脉冲的3D扰相位梯度回波(FLASH)序列.采用32通道体部相控阵线圈进行数据获取.冠状静脉的图像质量由4分法进行评价.连续变量表达为(-x)±s,用配对t检验评价CS窦口前后径及上下径的差异.结果 40例受试者成功完成3.0 T CE CMRA检查,其中38例(95.0%)受试者的图像能够进行评价.左心室后静脉(PVLV)及左边缘静脉(LMV)距冠状窦(CS)窦口的距离分别为(3.34±0.90)及(6.12±1.02)cm.CS、后室间静脉(PIV)、PVLV、LMV及前室间静脉(AIV)的平均图像质量得分分别为(4.0±0.0)、(3.4±0.5)、(3.4±0.5)、(3.0±0.8)及(3.3±0.5)分.CS窦口的上下径[(1.10±0.26)cm]大于前后径[(0.83±0.19)cm],差异有统计学意义(t=-4.31,P<0.05).结论 3.0 T MR CE CMRA能够清晰地评价冠状静脉解剖.

Evaluation of cardiac venous anatomy with contrast-enhanced whole-heart coronary MR angiography at 3. 0 T

Objective To evaluate the value of contrast-enhanced whole-heart coronary magnetic resonance angiography ( CE CMRA ) at 3.0 T in the delineation of cardiac venous anatomy. Methods Contrast-enhanced whole-heart CMRA at 3.0T was performed in 43 consecutive subjects using ECG-triggered, navigator-gated, inversion-recovery prepared, segmented gradient-echo sequence with a 32-channel cardiac coil. The visibility of the coronary veins was graded visually using a 4-point scale.Continuous variable was expressed as (-x)±s. The paired student t test was used to evaluate the differences of the coronary sinus (CS) ostium diameter in anteroposterior and superoinferior directions. Results CMRA examination was successfully completed in 40 subjects with acquisition time of ( 6. 9 ± 1.8 ) min. The cardiac veins were finally evaluated in 38 of 40 (95.0%) subjects. The mean distance of the posterior vein of the left ventricle (PVLV) and the left marginal vein (LMV) to the CS ostium were (3.34 ± 0. 90) and (6. 12 ± 1.02) cm, respectively. The mean visibility scores of CS, posterior interventricular vein (PIV),PVLV, LMV, and anterior interventricular vein (AIV) were 4.0 ± 0.0, 3.4 ± 0. 5, 3.4 ± 0. 5, 3.0 ± 0. 8,and 3. 3 ± 0. 5, respectively. The diameter of the CS ostium in the superoinferior direction ( 1.13 ±0. 26) cm was larger than that in the anteroposterior direction (0. 82 ± 0. 19) cm (t = -4. 31 ,P <0. 05).Conclusion Contrast-enhanced whole-heart CMRA at 3.0 T can clearly depict the cardiac venous anatomy.