多中心心房电心电图 (ECG) 分类使用里埃空间卷积神经网络 (FD-CNN) 和转移学习
Luiz Vasconcelos1, Bryan Perez Martinez2, Madeline Kent3
1Department of Radiology, Mayo Clinic, Rochester, MN, USA.
Journal of electrocardiology
|October 1, 2023
概括
与时间域 (TD) 模型相比,频域 (FD) 卷积神经网络 (CNN) 模型在多中心心电图 (ECG) 分类方面表现出优越的稳定性,即使有转移学习 (TL). FD CNN 在各种数据集中保持性能,从而实现更广泛的应用.
科学领域:
- 心脏病学 心脏病学
- 人工智能的人工智能
- 信号处理 信号处理
背景情况:
- 机器学习 (ML) 算法在心电图 (ECG) 分类中达到高精度,但由于数据的变化,在多中心部署中面临挑战.
- 转移学习 (TL) 旨在在各机构适应ML模型,但由于ECG获取 (类型,时间,采样率) 的差异,性能可能会下降.
研究的目的:
- 评估时间域 (TD) 和频域 (FD) 卷积神经网络 (CNN) 模型在机构间环境中进行心房动 (AFIB) 分类的性能.
- 评估TD和FDCNN模型与TL的稳定性,当它们应用于多样化,公开可用的ECG数据集时.
主要方法:
- 在大型 PTB-XL ECG 数据集上训练 TD 和 FD CNN 模型进行 AFIB 分类.
- 在两个独立的数据集上测试训练模型:洛巴切夫斯基大学心电图数据库 (LUDB) 和韩国大学医学中心数据库 (KURIAS).
- 应用转移学习 (TL) 来微调目标数据集的模型.
主要成果:
- 在不同机构数据集中,FD CNN模型保持了高性能 (F1得分>0.81).
- 即使在TL之后,TD CNN模型的性能在应用于新数据集时显著降低 (<0.53 F1得分),即使在TL之后.
- 与TD CNN相比,FD CNN在跨机构数据变化方面表现出优越的稳定性.
结论:
- 频域CNN为机构间的心电图分类提供了比时间域CNN更强大的方法.
- FD CNN模型显示了广泛临床应用的潜力,而不会影响不同数据源的ECG分类准确性.
- 这些发现凸显了特征提取方法 (FD与TD) 在开发可泛化的医疗保健ML模型中的重要性.
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