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arXiv 1806.04066cs.CV
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心脏MR图像序列运动估计与分割的联合学习

Joint Learning of Motion Estimation and Segmentation for Cardiac MR Image Sequences

Imperial College London(帝国理工学院);Queen Mary University of London(伦敦玛丽女王大学);University of Oxford(牛津大学)

Chen Qin, Wenjia Bai, Jo Schlemper, Steffen E. Petersen, Stefan K. Piechnik, Stefan Neubauer, Daniel Rueckert

摘要:

心脏运动估计和分割在定量评价心脏功能和心血管疾病诊断中具有重要作用。在本文中,我们提出了一种新的深度学习方法,用于心脏MR图像序列的运动和分割的联合估计。所提出的网络由两个分支组成:心脏运动估计分支,它是建立在一个新的无监督暹罗风格的递归空间Transformer网络,和心脏分割分支,是基于一个完全卷积网络。特别地,通过同时优化分割分支和运动估计分支来学习联合多尺度特征编码器。这通过利用在运动估计分支中从大量未注释的数据中无监督地学习的特征来实现弱监督分割。使用来自220名受试者的心脏MRI图像的实验结果表明,这两个任务的联合学习是互补的,所提出的模型在准确性和速度方面明显优于竞争方法。

英文摘要:

Cardiac motion estimation and segmentation play important roles in quantitatively assessing cardiac function and diagnosing cardiovascular diseases. In this paper, we propose a novel deep learning method for joint estimation of motion and segmentation from cardiac MR image sequences. The proposed network consists of two branches: a cardiac motion estimation branch which is built on a novel unsupervised Siamese style recurrent spatial transformer network, and a cardiac segmentation branch that is based on a fully convolutional network. In particular, a joint multi-scale feature encoder is learned by optimizing the segmentation branch and the motion estimation branch simultaneously. This enables the weakly-supervised segmentation by taking advantage of features that are unsupervisedly learned in the motion estimation branch from a large amount of unannotated data. Experimental results using cardiac MRI images from 220 subjects show that the joint learning of both tasks is complementary and the proposed models outperform the competing methods significantly in terms of accuracy and speed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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