Exact frequency-domain reconstruction for thermoacoustic tomography--II: Cylindrical geometry.
Microwave-induced thermoacoustic tomography (TAT) in a cylindrical configuration is developed to image biological tissue. Thermoacoustic signals are acquired by scanning a flat ultrasonic transducer. Using a new expansion of a spherical wave in cylindrical coordinates, we apply the Fourier and Hankel transforms to TAT and obtain an exact frequency-domain reconstruction method. The effect of discrete spatial sampling on image quality is analyzed. An aliasing-proof reconstruction method is proposed. Numerical and experimental results are included.
Xu
Yuan
Y
Department of Biomedical Engineering, Texas A&M University, College Station 77843-3120, USA.
Xu
Minghua
M
Wang
Lihong V
LV
D000273:Adipose Tissue / Q000033:anatomy & histology; D000465:Algorithms; D000818:Animals; D003198:Computer Simulation; D005583:Fourier Analysis; D007089:Image Enhancement / Q000379:methods*; D008872:Microwaves; D018482:Muscle, Skeletal / Q000033:anatomy & histology; D019047:Phantoms, Imaging; D015203:Reproducibility of Results; D012542:Scattering, Radiation; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted; D013552:Swine; D013696:Temperature; D014054:Tomography / Q000295:instrumentation / Q000379:methods*; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*