基于深度学习的超声心动图切面识别方法

摘要

A deep model for automatic recognition of echocardiographic standard views based on deep convolutional neural network was proposed,and the effectiveness of the deep model was analyzed by visualize class activation maps.In order to overcome the shortcomings of the fully connected layer occupying most of the parameters of the model,the spatial pyramid mean pool was used to replace the fully connected layer,and more spatial structure information was obtained.The model parameters and the over-fitting risk were reduced.The attention mechanism was introduced into the model visualization process by the class significance region.The robustness and effectiveness of the deep convolution neural network model were explained by the case recognizing echocardiographic standard views.Visualization analysis on echocardiography show that the decision basis made by the improved depth model is consistent with the standard view classification by the sonographer which indicates the validity and practicability of the proposed method.%提出了一种基于深度卷积神经网络自动识别超声心动图标准切面的方法,并可视化分析了深度模型的有效性.针对网络全连接层占有模型大部分参数的缺点,引入空间金字塔均值池层化替代全连接层,获得更多空间结构信息,并大大减少模型参数、降低过拟合风险,通过类别显著性区域将类似注意力机制引入模型可视化过程.通过超声心动图标准切面的识别问题案例,对深度卷积神经网络模型的鲁棒性和有效性进行解释.在超声心动图上的可视化分析实验表明,改进深度模型作出的识别决策依据,同医师辨别分类超声心动图标准切面的依据一致,表明所提方法的有效性和实用性.