Department;
of;
Medical;
Ultrasound,;
Tongji;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,Wuhan;
430030;
Department;
of;
Medical;
Ultrasound,;
Tongji;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,Wuhan;
430030;
Department;
of;
Medical;
Ultrasound,;
Tongji;
Hospital,;
Tongji;
Medical;
College,;
Huazhong;
University;
of;
Science;
and;
Technology,Wuhan;
430030;
ultrasound; backscatter; microbubbles; intracardiac; pressure;