Microwave-induced thermoacoustic tomography using multi-sector scanning.
A study of microwave-induced thermoacoustic tomography of inhomogeneous tissues using multi-sector scanning is presented. A short-pulsed microwave beam is used to irradiate the tissue samples. The microwave absorption excites time-resolved acoustic waves by thermoelastic expansion. The amplitudes of the acoustic waves are strongly related to locally absorbed microwave-energy density. The acoustic waves may propagate in all spatial directions. A focused ultrasonic transducer is employed to acquire temporal acoustic signals from multiple directions. Each detected signal is converted into a one-dimensional (1D) image along the acoustic axis of the transducer. The cross-sectional images of the tissue samples are calculated by combining all of the 1D images acquired in the same planes.
Xu
M
M
Optical Imaging Laboratory, Biomedical Engineering Program, Texas A&M University, College Station 77843-3120, USA.
Ku
G
G
Wang
L V
LV
D000162:Acoustics; D000273:Adipose Tissue / Q000033:anatomy & histology; D000818:Animals; D055592:Biophysical Phenomena; D001703:Biophysics; D008872:Microwaves; D009132:Muscles / Q000033:anatomy & histology; D013552:Swine; D013817:Thermography / Q000379:methods; D014054:Tomography / Q000295:instrumentation / Q000379:methods*