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Microwave‐induced thermoacoustic tomography using multi‐sector scanning
Author(s) -
Xu Minghua,
Ku Geng,
Wang Lihong V.
Publication year - 2001
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.1395037
Subject(s) - thermoelastic damping , microwave , thermoacoustics , transducer , acoustics , materials science , tomography , ultrasonic sensor , acoustic wave , optics , signal (programming language) , physical acoustics , physics , thermal , computer science , quantum mechanics , meteorology , programming language
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.