心肌超声背向散射积分检测的实验研究

心肌超声背向散射积分（ＩＢ）在心动周期中起伏的幅度因心肌缺血而减小，对诊断心肌缺血有重要临床意义。本论文利用５０ＭＨｚ的高速数据采集卡以及商业超声成象仪和数字示波器，建立了一套ＩＢ检测的实验系统，实现了在一个心动周期中对心肌散射回波的多次采样，并成功地从受检者身上检测到了正常心肌中ＩＢ随心动周期的起伏，起伏幅度与文献报道相符。证实了所建系统及方法的正确性和可行性，为将其推向临床应用前进了一步。

An Experimental Study on the Detection of Myocardial Ultrasonic Integrated Backscatter

The amplitude of the fluctuation of myocardial ultrasonic integrated backscatter (IB) decreases when myocardial ischemia occurs,which makes IB important for the diagnosis of this disease.In this paper,an experimental system based on 50MHz A/D and commercial ultrasonic imaging system and digitizing oscilloscope is established.The normal fluctuation of IB has been successfully detected by using the system.Experimental results are in accordance with those reported before,which indicate the feasibility of the system and method to detect myocardial IB.