期刊
IEEE TRANSACTIONS ON MEDICAL IMAGING
卷 21, 期 7, 页码 814-822出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMI.2002.801176
关键词
microwave; reconstruction; thermoacoustic; tomography
类别
资金
- NCI NIH HHS [R01 CA71980] Funding Source: Medline
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.
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