Time-domain reconstruction for thermoacoustic tomography in a spherical geometry
Tóm tắt
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.
Từ khóa
#Time domain analysis #Tomography #Geometry #Image reconstruction #Pulse measurements #Biological tissues #Microwave measurements #Ultrasonic variables measurement #Ultra wideband technology #Ultrasonic transducersTài liệu tham khảo
10.1118/1.598688
10.1109/TBME.1981.324791
arfken, 1995, Mathematical Methods for Physicists
10.1103/RevModPhys.58.381
morse, 1953, Methods of Theoretical Physics
10.1109/TMI.2002.801172
10.1109/TMI.2002.801171
kremkau, 1993, Diagnostic Ultrasound Principles and Instruments
10.1109/42.781016
10.1118/1.1333409
10.1109/42.310883
10.1364/AO.39.005872
10.1118/1.1395037
10.1109/42.781015
larsen, 1986, Medical Applications of Microwave Imaging
10.1364/AO.39.005971