A Digital Multigate Doppler Method for High Frequency Ultrasound

Sensors

Weibao Qiu²  Zongying Ye²  Yanyan Yu¹  Yan Chen³  Liyang Chi²  Peitian Mu²  Guofeng Li²  Congzhi Wang²  Yang Xiao²  Jiyan Dai³  Lei Sun⁴ 

[1] Department of Electronic Engineering, City University of Hong Kong, Hong Kong, China; E-Mail:;Paul C. Lauterbur Research Center for Biomedical Imaging, Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; E-Mails:;The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China; E-Mails:;Interdisciplinary Division of Biomedical Engineering, The Hong Kong Polytechnic University, Hong Kong, China; E-Mail:

关键词: flow visualization;    multigate PW Doppler;    digital quadrature demodulation;    high frequency ultrasound;   

DOI  :  10.3390/s140813348

来源: mdpi

【 摘 要 】

Noninvasive visualization of blood flow with high frequency Doppler ultrasound has been extensively used to assess the morphology and hemodynamics of the microcirculation. A completely digital implementation of multigate pulsed-wave (PW) Doppler method was proposed in this paper for high frequency ultrasound applications. Analog mixer was eliminated by a digital demodulator and the same data acquisition path was shared with traditional B-mode imaging which made the design compact and flexible. Hilbert transform based quadrature demodulation scheme was employed to achieve the multigate Doppler acquisition. A programmable high frequency ultrasound platform was also proposed to facilitate the multigate flow visualization. Experimental results showed good performance of the proposed method. Parabolic velocity gradient inside the vessel and velocity profile with different time slots were acquired to demonstrate the functionality of the multigate Doppler. Slow wall motion was also recorded by the proposed method.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.