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

doi:10.1088/1674-1056/24/2/024304

›› 2015, Vol. 24 ›› Issue (2): 24304-024304.doi: 10.1088/1674-1056/24/2/024304

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

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

刘良兵^{a b}, 陶超^a, 刘晓峻^a, 李先利^b, 张海涛^b

a Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China;
b Logistical Engineering University, Chongqing 401311, China

收稿日期:2014-05-27 修回日期:2014-09-07 出版日期:2015-02-05 发布日期:2015-02-05
基金资助:
Project 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), and the Chongqing Science and Technology Commission of China (Grant Nos. 2012jjA40058 and 2012jjA40006).

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

Liu Liang-Bing (刘良兵)^{a b}, Tao Chao (陶超)^a, Liu Xiao-Jun (刘晓峻)^a, Li Xian-Li (李先利)^b, Zhang Hai-Tao (张海涛)^b

a Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China;
b Logistical Engineering University, Chongqing 401311, China

Received:2014-05-27 Revised:2014-09-07 Online:2015-02-05 Published:2015-02-05
Contact: Tao Chao, Liu Xiao-Jun E-mail:taochao@nju.edu.cn;liuxiaojun@nju.edu.cn
Supported by:
Project 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), and the Chongqing Science and Technology Commission of China (Grant Nos. 2012jjA40058 and 2012jjA40006).

摘要/Abstract

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.

关键词: photo-acoustic tomography, thermo-acoustic tomography, limited-view, pulse decomposition, image reconstruction

Abstract: 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.

Key words: photo-acoustic tomography, thermo-acoustic tomography, limited-view, pulse decomposition, image reconstruction

中图分类号: (Acoustic signal processing)

43.60.+d

44.05.+e (Analytical and numerical techniques) 43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)

刘良兵, 陶超, 刘晓峻, 李先利, 张海涛. Pulse decomposition-based analysis of PAT/TAT error caused by negative lobes in limited-view conditions[J]. , 2015, 24(2): 24304-024304.

Liu Liang-Bing (刘良兵), Tao Chao (陶超), Liu Xiao-Jun (刘晓峻), Li Xian-Li (李先利), Zhang Hai-Tao (张海涛). Pulse decomposition-based analysis of PAT/TAT error caused by negative lobes in limited-view conditions[J]. Chin. Phys. B, 2015, 24(2): 24304-024304.

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

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

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