Design and Implementation of an ARM Cortex-M3 Based Miniaturized High Frequency Ultrasound Pulsed-Wave Doppler System
碩士 === 國立臺灣科技大學 === 電機工程系 === 104 === Doppler ultrasound is one of the main blood flow measurement tools in clinical diagnosis. Miniaturization of medical devices including ultrasound systems has become an important trend due to the advantages of high portability and low-cost. In this study, a 10MH...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/46h2x9 |
| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 104 === Doppler ultrasound is one of the main blood flow measurement tools in clinical diagnosis. Miniaturization of medical devices including ultrasound systems has become an important trend due to the advantages of high portability and low-cost.
In this study, a 10MHz pulsed Doppler ultrasound system was developed for flow measurement. The primary circuits include high- frequency and high-speed electronic devices for demodulation, filtering, and sample-and-hold. In addition, the system uses an ARM Cortex-M3 based microcontroller (MCU) for real-time digital signal processing. The ARM-based MCU also offers two analog to digital converters(ADC) and has the advantages of low power and low cost. The analog Doppler signals were digitalized via the ADC on the same MCU for better integration and a Liquid Crystal Module (LCM) displays the Doppler spectrum.
Performance of the Doppler system was examined using blood flow phantom. Results indicate that the detected flow velocity is proportional to the actual flow velocity.
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