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IEEE Trans Med Imaging. 2002 Jul;21(7):814-22.

Time-domain reconstruction for thermoacoustic tomography in a spherical geometry.

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Department of Biomedical Engineering, Texas A&M University, College Station 77843-3120, USA.


Reconstruction-based microwave-induced thermoacoustic tomography in a spherical configuration is presented. Thermoacoustic waves from biological tissue samples excited by microwave pulses are measured by a wide-band unfocused ultrasonic transducer, which is set on a spherical surface enclosing the sample. Sufficient data are acquired from different directions to reconstruct the microwave absorption distribution. An exact reconstruction solution is derived and approximated to a modified backprojection algorithm. Experiments demonstrate that the reconstructed images agree well with the original samples. The spatial resolution of the system reaches 0.5 mm.

[Indexed for MEDLINE]

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