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Exact frequency-domain reconstruction for thermoacoustic tomography. II. Cylindrical geometry

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3 Author(s)
Yuan Xu ; Opt. Imaging Lab., Texas A&M Univ., College Station, TX, USA ; Minghua Xu ; Wang, L.V.

For pt. I see ibid., vol. 21, no. 7, p. 823-8 (2002). 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.

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Medical Imaging, IEEE Transactions on  (Volume:21 ,  Issue: 7 )