Doppler ultrasound compared with electrocardiogram and pulse oximetry cardiac triggering: A pilot study
Doppler ultrasound compared with electrocardiogram and pulse oximetry cardiac triggering: A pilot study
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DOI：
10.1002/mrm.25502
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发表时间：
2015-11-01
影响因子：
3.3
通讯作者：
Yamamura, Jin
中科院分区：
文献类型：
--
作者：
Kording, Fabian;Schoennagel, Bjoern;Yamamura, Jin
目的准确触发心动周期对于获得最佳图像采集以及心脏磁共振成像的诊断质量至关重要。这项工作的目的是评估多普勒超声作为心脏 MRI 的替代触发方法。方法在 11 名健康受试者中以 1.5T 进行稳态自由进动 (SSFP) 2D 电影 CMR。多普勒超声（DUS）、心电图（ECG）和脉搏血氧饱和度（POX）用于心脏触发。与 ECG 相比，DUS 峰值检测得到验证。通过计算心内膜边界清晰度（EBS）和左心室（LV）功能参数并与心电图进行比较来确定每种门控方法的图像质量的定量分析。结果DUS和心电图检测到的RR间期的平均差异为0.04±63ms（r = 0.96）。 ECG 和 DUS 之间的触发抖动没有差异 (P = 0.15)，但 ECG 和 POX 之间存在显着差异 (P = 0.01)。每种方法之间的 EBS 相似（3.1 +/- 0.2 / 2.6 +/- 0.2 / 2.9 +/- 0.2 像素）。每搏输出量的平均差异在 -1 +/- 7 mL（ECG/DUS，P = 0.9）和 2 +/- 10 mL（ECG/POX，P = 0.8）之间没有显着差异。结论 使用 DUS 的电影心脏 MRI 已成功证明。 DUS 触发是心脏 MRI 的替代方法，可应用于临床环境。 Magn Reson Med 74:1257-1265, 2015。(c) 2014 Wiley periodicals, Inc.
PurposeAccurate triggering of the cardiac cycle is mandatory for optimal image acquisition and thus diagnostic quality in cardiac magnetic resonance imaging. The purpose of this work was to evaluate Doppler ultrasound as an alternative trigger method in cardiac MRI.MethodsSteady-state free precession (SSFP) 2D cine CMR was performed in 11 healthy subjects at 1.5T. Doppler ultrasound (DUS), electrocardiogram (ECG) and pulse oximetry (POX) were used for cardiac triggering. DUS peak detection was verified in comparison to ECG. Quantitative analysis of image quality of each gating method was determined by calculating endocardial border sharpness (EBS) and left ventricular (LV) function parameters and compared with ECG.ResultsMean difference between DUS and ECG in detected RR intervals was 0.04 63 ms (r = 0.96). Trigger jitter was not different between ECG and DUS (P = 0.15) but significant different between ECG and POX (P = 0.01). EBS was similar between each method (3.1 +/- 0.2 / 2.6 +/- 0.2 / 2.9 +/- 0.2 pixel). Mean differences in stroke volume were not significantly different with -1 +/- 7 mL (ECG/DUS, P = 0.9) and 2 +/- 10 mL (ECG/POX, P = 0.8).ConclusionCine cardiac MRI using DUS was successfully demonstrated. DUS triggering is an alternative method for cardiac MRI and may be applied in a clinical setting. Magn Reson Med 74:1257-1265, 2015. (c) 2014 Wiley Periodicals, Inc.