数字插值波束形成器在医学超声成像中的应用  

Digital Interpolation Beamformer in Medical Ultrasound Imaging

作　　者：舒淑丽[1] 汤文文[1] 王靓[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《中国医疗器械杂志》2007年第5期328-329,共2页Chinese Journal of Medical Instrumentation

摘　　要：在医学超声成像系统中,数字波束形成器是影响其性能及硬件复杂度的关键部分,它要求A/D采样率大大高于奈奎斯特频率以满足延时精度的要求。报告采用数字插值波束形成器,通过插零、滤波的方法实现精延时。结果表明,数字插值波束形成器大大降低了A/D转换电路的复杂度。　A digital beamformer in medical ultrasound imaging systems conventionally requires that the returning signals received by transducers are sampled at a rate significantly higher than the Nyquist rate.This paper presents a digital beamformer that employs zero padding followed by digital interpolation filtering to achieve vernier beamformer delays.The experimental results show that the digital interpolation beamformer can greatly decrease the complexity of A/D converter circuitry.

关 键 词：数字波束形成器 医学超声成像 插值 精延时 

分 类 号：R318.6[医药卫生—生物医学工程]