Design of high-speed data acquisition system for very high frequency medical ultrasonic echo signals
10.7687/j.issn1003-8868.2017.11.001
- VernacularTitle:一种甚高频医学超声回波信号高速数据采集系统的设计
- Author:
chun Xiao WANG
1
;
Jun YANG
;
jun Jian JI
;
qun Yan WANG
;
Sheng ZHOU
Author Information
1. 中国医学科学院北京协和医学院生物医学工程研究所
- Keywords:
very high frequency;
ultrasonic echo signal;
ultrasound biomicroscopy;
ADC chip;
analog-to-digital conver-sion;
FPGA technique
- From:
Chinese Medical Equipment Journal
2017;38(11):1-4,9
- CountryChina
- Language:Chinese
-
Abstract:
Objective To develop a high-speed data acquisition system for very high frequency medical ultrasonic echo signals. Methods The chip LTC2285 with two integrated ADC channels was adopted to realize analog-to-digital conversion of ultrasonic echo signals. The sampling rate was 120 MHz. The converted digital signals were then input to the FPGA to realize parallel to serial conversion, and high-speed digital signals with a sampling rate of 240 MHz were obtained. Finally, the data were transferred through USB interface to the computer terminal to display. Results A timing simulation experiment, a resolution detection experiment, and an in vivo experiment of normal human eyes were carried out in this system. A preferable simulation result and real-time image were obtained. Conclusion The multi-channel and FPGA technology are used in the design of the system. Lastly, this technology simplifies the overall design of the system and improves the speed and reliability of the high speed data acquisition system.