传感技术学报2018，Vol.31Issue(3)：374-379,6.DOI:10.3969/j.issn.1004-1699.2018.03.010
一种基于误差约束的动态聚焦最优分段方法
The Optimal Segmentation Method Based on Error Constraints for Dynamic Focusing
摘要
Abstract
According to the difficulty of dynamic focusing in ultrasound system,an optimal segmentation method for dynamic focus is proposed. Firstly,according to the given error constraints,the geometrical segmentation positions are calculated. Secondly,based on the focusing channels and the sampling frequency,the number of segmentation positions for focusing channels and the focus delays of each channel can be obtained. Then optimizing the focusing error of each channel is implemented by dynamically changing the quantization unit. Correspondingly,the hardware scheme of the focus delays compression and generation are put forward. In order to verify the validity,the focusing error analysis and point target imaging experiment are conducted. The numerical analysis and experimental results indicate the proposed approach can obtain the optimal segmentations and the focusing errors are limited to the given error constraints. The Structural Similarity of imaging results between the proposed approach and the ideal focusing method is 0.9477.关键词
超声成像/误差约束/分段聚焦/压缩存储Key words
ultrasonic imaging/error constraints/segment focus/compression storage分类
信息技术与安全科学引用本文复制引用
罗汉武,孙广,崔士刚,林楠,王思奇,王平..一种基于误差约束的动态聚焦最优分段方法[J].传感技术学报,2018,31(3):374-379,6.基金项目
国家自然科学基金项目(51677010) （51677010）
