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首页> 外文期刊>Acta Radiologica >Multiphase evaluation of myocardial bridging with dual-source computed tomography.
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Multiphase evaluation of myocardial bridging with dual-source computed tomography.

机译：双源计算机断层扫描对心肌桥的多阶段评估。

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摘要

BACKGROUND: Myocardial bridging (MB), also known as a tunneled artery, is a congenital anomaly that can be readily diagnosed with multidetector-row computed tomography (MDCT). With the advent of dual-source CT (DSCT), it may be feasible to evaluate dynamic changes of MB throughout the entire cardiac cycle. PURPOSE: To determine the feasibility of dynamic evaluation of MB using DSCT. MATERIAL AND METHODS: Forty-eight patients with MB of the left anterior descending artery diagnosed with multiplanar reconstruction on DSCT were included in this study. Multiphase reconstructions were performed for every subject. Image quality was assessed using a four-point scale (4 = excellent; 3 = good; 2 = adequate; 1 = not assessable). Systolic and diastolic images with optimal image quality were selected. Milking effect, defined as the narrowing of the tunneled artery during systole and its dilatation during diastole, was recorded. The stenosis rate of MB was computed. RESULTS: The optimal systolic and diastolic phases occurred between 40% and 70% of the R-R interval (range 20-80% of R-R interval). The image quality scores of all segments in systole and diastole were higher than or equal to 3. Diameter changes of tunneled vessel under MB in systole and diastole indicated milking effect, visualized on conventional coronary angiography (CAG). Average percentage of narrowing of the MB was 36+/-14%. CONCLUSION: High-quality systolic and diastolic images can be acquired using DSCT. Dynamic visualization of MB is possible, and milking effect can be quantified using DSCT.
机译：背景：心肌桥（MB），也称为隧道动脉，是一种先天性异常，可通过多排行计算机断层扫描（MDCT）轻松诊断。随着双源CT（DSCT）的出现，评估整个心动周期中MB的动态变化可能是可行的。目的：确定使用DSCT动态评估MB的可行性。材料与方法：本研究纳入了48例经DSCT多平面重建诊断为左前降支MB的患者。对每个受试者进行多相重建。图像质量使用四点标度进行评估（4 =优秀; 3 =良好; 2 =足够; 1 =无法评估）。选择具有最佳图像质量的收缩和舒张图像。记录了挤奶作用，其定义为收缩期收缩的动脉狭窄和舒张期的扩张。计算MB的狭窄率。结果：最佳的收缩期和舒张期发生在R-R间隔的40％至70％之间（R-R间隔的20-80％范围）。收缩期和舒张期所有节段的图像质量得分均高于或等于3。在常规冠状动脉造影（CAG）上可见，收缩期和舒张期MB下的隧道血管直径变化显示出挤奶效果。 MB变窄的平均百分比为36 +/- 14％。结论：可以使用DSCT获得高质量的收缩期和舒张期图像。 MB的动态可视化是可能的，并且可以使用DSCT量化挤奶效果。

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