基于FPGA的数字化眼科超声成像中信号处理算法的研究与实现  

Research and Realization of Signal Processing Algorithms Based on FPGA in Digital Ophthalmic Ultrasonography Imaging

作　　者：方思敏[1] 周盛[1] 王晓春[1] 叶青盛 田玲[1] 计建军[1,2] 王延群[1,2] 

机构地区：[1]北京协和医学院中国医学科学院生物医学工程研究所,天津市300192 [2]天津市眼科医学设备技术工程中心,天津市300384

出　　处：《中国医疗器械杂志》2015年第1期1-4,共4页Chinese Journal of Medical Instrumentation

基　　金：国家"十二五"科技支撑计划课题(2012BAI13B02);北京协和医学院研究生创新基金(2013-1001-29)

摘　　要：目的基于FPGA对眼科超声诊断仪中的信号处理算法进行设计和改进。方法在Quartus II中用Verilog HDL硬件语言实现全并行分布式动态滤波、数字正交检波、二叉树法对数压缩三大信号处理模块。结果相对原有系统,硬件开销减少,整体成像更为清晰,眼球深部的信息更为完整,探测深度由原来的5 cm提高到6 cm。结论所设计的算法达到了设计要求,能够有效提高现有设备的成像质量,实现了系统优化。Objective To design and improve signal processing algorithms of ophthalmic ultrasonography based on FPGA. Methods Achieved three signal processing modules： full parallel distributed dynamic filter, digital quadrature demodulation, logarithmic compression, using Verilog HDL hardware language in Quartus II. Results Compared to the original system, the hardware cost is reduced, the whole image shows clearer and more information of the deep eyeball contained in the image, the depth of detection increases from 5 cm to 6 cm. Conclusion The new algorithms meet the design requirements and achieve the system＇s optimization that they can effectively improve the image quality of existing equipment.

关 键 词：眼科超声 数字信号处理 动态滤波 正交检波 对数压缩 

分 类 号：R318.6[医药卫生—生物医学工程]