结合双通道 SE-ResNet 和专家特征的新型诊断方法用于患者间心跳分类

IF 1.7 4区 医学 Q3 ENGINEERING, BIOMEDICAL Medical Engineering & Physics Pub Date : 2024-08-01 DOI:10.1016/j.medengphy.2024.104209
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引用次数: 0

摘要

随着心血管疾病(CVDs)患者人数的逐年增加,一个可靠的自动心电图(ECG)异常检测系统变得越来越重要。学者们利用机器学习或深度学习开发了许多心律失常分类方法。然而,在患者间心跳分类中,单个类别的分类率较低仍是一个难题。本研究提出了一种融合双通道挤压-激励残差神经网络(SE-ResNet)和专家特征的患者间心跳分类方法。在预处理阶段,对从双导联心电图信号中提取的心电图心跳进行过滤和归一化处理。此外,还选择了代表波形形态和心跳上下文信息的九个特征与深度神经网络融合。通过对每个区块使用不同的滤波器和核大小,基于 SE 残留区块的模型可以有效地学习心跳之间的长期特征。然后,将分割的心电图心搏和提取的特征输入到改进的 SE-ResNet 中,根据患者间方案进行训练和测试。利用焦点损失处理不平衡类别的心跳。所提出的心律失常分类方法在三个开源数据库中进行了评估,在 MIT-BIH 数据库中的总体 F1 分数达到了 83.39 %。该系统可应用于日常心电图监测场景,并在诊断心律失常方面发挥重要作用。
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A novel diagnosis method combined dual-channel SE-ResNet with expert features for inter-patient heartbeat classification

As the number of patients with cardiovascular diseases (CVDs) increases annually, a reliable and automated system for detecting electrocardiogram (ECG) abnormalities is becoming increasingly essential. Scholars have developed numerous methods of arrhythmia classification using machine learning or deep learning. However, the issue of low classification rates of individual classes in inter-patient heartbeat classification remains a challenge. This study proposes a method for inter-patient heartbeat classification by fusing dual-channel squeeze-and-excitation residual neural networks (SE-ResNet) and expert features. In the preprocessing stage, ECG heartbeats extracted from both leads of ECG signals are filtered and normalized. Additionally, nine features representing waveform morphology and heartbeat contextual information are selected to be fused with the deep neural networks. Using different filter and kernel sizes for each block, the SE-residual block-based model can effectively learn long-term features between heartbeats. The divided ECG heartbeats and extracted features are then input to the improved SE-ResNet for training and testing according to the inter-patient scheme. The focal loss is utilized to handle the heartbeat of the imbalance category. The proposed arrhythmia classification method is evaluated on three open-source databases, and it achieved an overall F1-score of 83.39 % in the MIT-BIH database. This system can be applied in the scenario of daily monitoring of ECG and plays a significant role in diagnosing arrhythmias.

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来源期刊
Medical Engineering & Physics
Medical Engineering & Physics 工程技术-工程:生物医学
CiteScore
4.30
自引率
4.50%
发文量
172
审稿时长
3.0 months
期刊介绍: Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and technical notes. Our focus encompasses the application of the basic principles of physics and engineering to the development of medical devices and technology, with the ultimate aim of producing improvements in the quality of health care.Topics covered include biomechanics, biomaterials, mechanobiology, rehabilitation engineering, biomedical signal processing and medical device development. Medical Engineering & Physics aims to keep both engineers and clinicians abreast of the latest applications of technology to health care.
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