一种基于chirp编码的高帧速率超声成像方法  

A High Frame Rate Ultrasound Imaging Method Based on Chirp Coding

作　　者：王靓[1] 汤文文[1] 舒淑丽[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《现代生物医学进展》2008年第2期354-355,360,共3页Progress in Modern Biomedicine

摘　　要：在医学超声成像系统中,帧速率由每帧图像的扫查发射次数所决定。同时发射多条波束可以提高图像的帧速率,但是这会带来不同波束间相互干扰的问题,形成伪像。本文基于编码激励的原理,提出了一种新的高帧速率成像方法。该方法通过发射一组线性频率调制编码信号,有效的降低了波束间的互扰。可以在不影响图像质量的情况下,成倍的提高图像的帧速率。In medical ultrasound imaging systems, frame rate is determined by the number of transmit events per frame. Frame rate can be increased with simultaneous transmission of a number of coded signals, but it will cause the interferences coming from different beams, and a pseudo-image is produced, In this article, a new method for high frame rate imaging is given which is based on the theory of coded excitation. The cross-talks between different beams can be reduced by transmitting a group of chirp coded signals simultaneously. It shows that this method can doubled the frame rate without degradation of image quality.

关 键 词：编码激励 线性频率调制 高帧速率成像 互扰 

分 类 号：R445[医药卫生—影像医学与核医学]