Development of Ultrasound Image Detection System based on Chirp-Coded Excitation

Abstract

Abstract: In addition to enhancing contrast for imaging, high-frequency ultrasound with contrast agents also supports regional genomics research and may be used for medication administration. The possible signal-to-noise ratio (SNR) and depth of penetration of high-frequency ultrasound are important constraints. However, using chirped pulses as trigger signals and a cardinal frequency of 30 MHz, we created a novel ultrasound system in this work that uses chirp-coded-excitation ultrasound imaging. A home-made expander that used a novel peep pulse with contrast agents to reduce pulse compression and energy decay in human tissue improved the signal-to-noise ratio (SNR) by 20dB for high-frequency ultrasound flow imaging of the zebrafish heart, and the penetration depth increased to 2.2mm. Yet, a microbubble experiment that used variable echo signal concentrations was successful in distributing a variety of microbubble types as anticipated. Using the setup that we developed, we can demonstrate experimentally that chirp-encoded excitation reduces the signal-to-noise ratio (SNR) by about 43dB compared to unipolar and bipolar pulse excitation.

Index Terms: SNR, High-frequency ultrasound, Chirped pulses, Image detection system, Microbubble