Pulse decomposition-based analysis of PAT/TAT error caused by negative lobes in limited-view conditions

作     者：刘良兵 陶超 刘晓峻 李先利 张海涛 Liu Liang-Bing;Tao Chao;Liu Xiao-Jun;Li Xian-Li;Zhang Hai-Tao

作者机构：Key Laboratory of Modern AcousticsNanjing University Logistical Engineering University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2015年第24卷第2期

页      面：276-281页

核心收录：

学科分类：08[工学] 080203[工学-机械设计及理论] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0704[理学-天文学] 

基　　金：supported by the National Basic Research Program of China(Grant No.2012CB921504) the National Natural Science Foundation of China(Grant Nos.11274167,11274171,61201450,61201495,and 61302175) the Chongqing Science and Technology Commission of China(Grant Nos.2012jjA40058 and 2012jjA40006) 

主　　题：photo-acoustic tomography thermo-acoustic tomography limited-view pulse decomposition image reconstruction 

摘      要：Pulse decomposition has been proven to be efficient to analyze complicated signals and it is introduced into the photo-acoustic and thermo-acoustic tomography to eliminate reconstruction distortions caused by negative lobes.During image reconstruction,negative lobes bring errors in the estimation of acoustic pulse amplitude,which is closely related to the distribution of absorption coefficient.The negative lobe error degrades imaging quality seriously in limited-view conditions because it cannot be offset so well as in full-view conditions.Therefore,a pulse decomposition formula is provided with detailed deduction to eliminate the negative lobe error and is incorporated into the popular delay-and-sum method for better reconstructing the image without additional complicated computation.Numerical experiments show that the pulse decomposition improves the image quality obviously in the limited-view conditions,such as separating adjacent absorbers,discovering a small absorber despite disturbance from a big absorber nearby,etc.