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.

• Type: Journal
• Year: 2002
• Where: TMI
• Authors: Yuan Xu, Minghua Xu, Lihong V. Wang
• Keywords: Flat Ultrasonic Transducer, Frequency-domain Reconstruction Method, Reconstruction Method, TMI 2002