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

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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.