School of Computer Science Chengdu University of Information Technology Chengdu 610225 China;
School of Computer Science Chengdu University of Information Technology Chengdu 610225 China;
School of Computer Science Sichuan University Chengdu 610065 China;
School of Computer Science Chengdu University of Information Technology Chengdu 610225 China;
Cardiac magnetic resonance imaging; multi-scale; semantic segmentation; convolutional neural networks;