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Published April 2000 | public
Book Section - Chapter

Scanning thermoacoustic tomograhy in biological tissue


Thermoacoustic tomography in the microwave region is explored to image biological tissue. When short-pulse electromagnetic energy is deposited into tissue, acoustic waves are generated due to thermoelastic expansion. The microwave-induced acoustic wave is detected with a focused ultrasonic detector. Each time-domain signal from the ultrasonic transducer represents a one-dimensional image along the acoustic axis. Scanning the system generates multi-dimensional images. The time-domain acoustic signal was simulated theoretically and measured experimentally, where the theoretical and experimental results were in good agreement. Two-dimensional tomographic images of biological tissue were obtained experimentally. Thermoacoustic tomography combines the advantage of microwaves in imaging contrast and the advantage of acoustic waves in imaging resolution.

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© 2000 Optical Society of America.

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January 14, 2024