Summary: | 碩士 === 輔仁大學 === 電機工程學系碩士班 === 103 === Compared to other medical imaging modalities, the advantages of ultrasonic imaging systems include non-invasive image formation, portability, real time acquisition and cost. Doppler ultrasonic device can be used to estimate the velocity of blood flow. It may help diagnose many diseases, including blood clots, heart valve defects, arterial occlusion, aneurysms and carotid artery stenosis.
To miniaturize ultrasound imaging system is desirable in today’s e-healthcare and telemedicine. The use of ASIC and FPGA can integrate various functions of digital signal processing into a chip. Furthermore, it supports accurate and fast computation. In this thesis, the digital circuits to implement most signal processing functions for continuous wave Doppler ultrasound devices are implemented, including low-pass filter, complex FFT computation, vector value and log compression. In addition, given a set of parameters, all these circuit can be automatically generated. This is suitable for applications of reconfigurable computing. Both ASIC and FPGA versions of the proposed design are implemented. The ASIC version is used for verification and the FPGA one will be used to prototype a practical Doppler ultrasonic system.
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