Ultrasound-modulated laser tomography

Lihong V. Wang; Gang Yao

doi:10.1117/12.431526

4 May 2001 Ultrasound-modulated laser tomography

Lihong V. Wang, Gang Yao

Proceedings Volume 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II; (2001) https://doi.org/10.1117/12.431526
Event: Saratov Fall Meeting 2000, 2001, Saratov, Russian Federation

Abstract

An ultrasonic beam was focused into a biological tissue sample to modulate the laser light passing through the ultrasonic beam inside the tissue. The speckle field formed by the transmitted laser light was detected by a CCD camera with the source-synchronous-illumination lock-in technique. The ultrasound-modulated laser light reflects the local optical and mechanical properties within the ultrasonic beam and can be used for tomographic imaging of the tissue. Spatial resolution along the ultrasonic axis was achieved by sweeping the ultrasonic frequency. Two-dimensional images of biological tissue were successfully obtained with both single frequency modulation and frequency-swept modulation. Three-dimensional images could be acquired as well in principle.

Citation Download Citation

Lihong V. Wang and Gang Yao "Ultrasound-modulated laser tomography", Proc. SPIE 4241, Saratov Fall Meeting 2000: Optical Technologies in Biophysics and Medicine II, (4 May 2001); https://doi.org/10.1117/12.431526

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