Title :
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
fDate :
7/1/2002 12:00:00 AM
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;
Journal_Title :
Medical Imaging, IEEE Transactions on
DOI :
10.1109/TMI.2002.801172
