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使用深度学习进行实时自动射血分数和短轴缩短率检测。

Real-Time Automatic Ejection Fraction and Foreshortening Detection Using Deep Learning.

出版信息

IEEE Trans Ultrason Ferroelectr Freq Control. 2020 Dec;67(12):2595-2604. doi: 10.1109/TUFFC.2020.2981037. Epub 2020 Nov 24.

Abstract

Volume and ejection fraction (EF) measurements of the left ventricle (LV) in 2-D echocardiography are associated with a high uncertainty not only due to interobserver variability of the manual measurement, but also due to ultrasound acquisition errors such as apical foreshortening. In this work, a real-time and fully automated EF measurement and foreshortening detection method is proposed. The method uses several deep learning components, such as view classification, cardiac cycle timing, segmentation and landmark extraction, to measure the amount of foreshortening, LV volume, and EF. A data set of 500 patients from an outpatient clinic was used to train the deep neural networks, while a separate data set of 100 patients from another clinic was used for evaluation, where LV volume and EF were measured by an expert using clinical protocols and software. A quantitative analysis using 3-D ultrasound showed that EF is considerably affected by apical foreshortening, and that the proposed method can detect and quantify the amount of apical foreshortening. The bias and standard deviation of the automatic EF measurements were -3.6 ± 8.1%, while the mean absolute difference was measured at 7.2% which are all within the interobserver variability and comparable with related studies. The proposed real-time pipeline allows for a continuous acquisition and measurement workflow without user interaction, and has the potential to significantly reduce the time spent on the analysis and measurement error due to foreshortening, while providing quantitative volume measurements in the everyday echo lab.

摘要

二维超声心动图左心室(LV)的容积和射血分数(EF)测量不仅由于手动测量的观察者间变异性,而且由于超声采集误差(如心尖缩短)而具有高度不确定性。在这项工作中,提出了一种实时且完全自动化的 EF 测量和缩短检测方法。该方法使用了几个深度学习组件,如视图分类、心脏周期定时、分割和地标提取,来测量缩短量、LV 容积和 EF。使用来自门诊的 500 名患者的数据集来训练深度神经网络,而来自另一家诊所的 100 名患者的另一个数据集用于评估,其中 LV 容积和 EF 由专家使用临床方案和软件进行测量。使用 3-D 超声进行的定量分析表明,EF 受到心尖缩短的显著影响,并且所提出的方法可以检测和量化心尖缩短的程度。自动 EF 测量的偏差和标准偏差为-3.6±8.1%,而平均绝对差异为 7.2%,均在观察者间变异性范围内,与相关研究相当。所提出的实时流水线允许在没有用户交互的情况下进行连续采集和测量工作流程,并且有可能大大减少由于缩短而导致的分析和测量误差的时间,同时在日常的超声实验室中提供定量的容积测量。

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