Hui Gan1, Yun Liu1, Li Liu2, Ying He3, Song Zhang4. 1. Department of Radiology, Xinqiao Hospital, Third Military Medical University, 400037, Chongqing, China. 2. Department of Cardiology, Xinqiao Hospital, Third Military Medical University, 400037, Chongqing, China. 3. Department of Ultrasound, Xinqiao Hospital, Third Military Medical University, 400037, Chongqing, China. 4. Department of Radiology, Xinqiao Hospital, Third Military Medical University, 400037, Chongqing, China. songz07@163.com.