Development of ultrahigh frame rate ultrasound imaging system for measurement of cardiovascular dynamics

测量心血管动力学对于评估心血管功能是非常宝贵的。诊断超声在时间分辨率上优于计算机断层扫描（CT）和磁共振成像（MRI），适合测量心血管动力学。我们已经将浅表动脉的成像帧率从传统成像方法的几十赫兹提高到1khz以上。在本研究中，为了实现高帧率超声心动图，发展了非聚焦发射波束、接收波束形成和超声图像重建的方法。此外，还开发了用于实现所提出的高帧率成像方法的多通道超声传输和接收系统。

Measurement of cardiovascular dynamics is invaluable for assessment of cardiovascular function. Diagnostic ultrasound is superior in temporal resolution compared to computed tomography (CT) and magnetic resonance imaging (MRI) and suitable for measurement of cardiovascular dynamics. We have already increased imaging frame rate of superficial arteries from several tens Hertz of conventional imaging method to over 1 kHz. In the present study, methods for unfocused transmit beams, receive beamforming, and ultrasound image reconstruction have been developed to realize high frame rate echocardiography. Also, a multi-channel ultrasound transmission and reception system has been developed for implementing the proposed high frame rate imaging method.