摘要
提出一种眼科B超图像实时采集的新方法。应用FPGA从眼科B超诊断仪的SVGA信号连接器(VGA connector)前端直接采集数字信号,通过对静态RAM和USB接口芯片的时序控制,实现B超图像的实时高速传输。图像传输经编码处理,以最大限度减少传输的误差。PC对上传的图像进行解码后,实现实时显示,并对采集后的图像进行必要的后处理。本文充分证实了应用USB接口实现图像实时传输显示的可行性,并进一步验证了数字视频采集的优势,即图像的高保真性、实时性和存储处理的便捷性。
A new method of real-time image-acquisition from B-scan ophthalmic ultrasound apparatus is presented. This method can make the B-scan ultrasound images transferred in real-time with high-speed. First, the SVGA digital signals were acquired from the front end of VGA connector and then transferred to SRAM and USB-chip which were all controlled by FPGA. Second, the image data was encoded in order to reduce errors during transfer. At last, the image data was decoded by PC software to display and process. This subject explores the feasibility of real-time transfer and display of B-scan ultrasound images by using of USB, and furthermore, indicates that digital video acquisition makes the images transferred with high-fidelity and high-speed, and make the images easy to store and process which are all its advantages.
出处
《北京生物医学工程》
2009年第6期614-617,621,共5页
Beijing Biomedical Engineering
基金
天津市科技支撑计划项目(207CKFSF01400)
中央级公益性研究院所基本科研业务专项资助