Exact frequency-domain reconstruction for thermoacoustic tomography. I. Planar geometry

Author

Xu, Yuan ; Feng, Dazi ; Wang, Lihong V.

Author_Institution

Opt. Imaging Lab., Texas A&M Univ., College Station, TX, USA

Volume

21

Issue

7

fYear

2002

fDate

7/1/2002 12:00:00 AM

Firstpage

823

Lastpage

828

Abstract

We report an exact and fast Fourier-domain reconstruction algorithm for thermoacoustic tomography in a planar configuration assuming thermal confinement and constant acoustic speed. The effects of the finite size of the detector and the finite length of the excitation pulse are explicitly included in the reconstruction algorithm. The algorithm is numerically and experimentally verified. We also demonstrate that the blurring caused by the finite size of the detector surface is the primary limiting factor on the resolution and that it can be compensated for by deconvolution.

Keywords

acoustic tomography; biomedical ultrasonics; image reconstruction; medical image processing; thermoacoustics; blurring; constant acoustic speed; deconvolution; exact frequency-domain reconstruction; excitation pulse; finite detector surface size; medical diagnostic imaging; planar configuration; planar geometry; primary limiting factor; reconstruction algorithm; resolution limitation; thermal confinement; thermoacoustic tomography; Detectors; Fourier transforms; Geometry; Image reconstruction; Optical imaging; Reconstruction algorithms; Spatial resolution; Surface reconstruction; Tomography; Ultrasonic imaging; Algorithms; Computer Simulation; Fourier Analysis; Image Enhancement; Microwaves; Phantoms, Imaging; Reproducibility of Results; Scattering, Radiation; Sensitivity and Specificity; Temperature; Tomography; Ultrasonography;

fLanguage

English

Journal_Title

Medical Imaging, IEEE Transactions on

Publisher

ieee

ISSN

0278-0062

Type

jour

DOI

10.1109/TMI.2002.801172

Filename

1036026