Ultrasound-modulated optical tomography for thick tissue imaging
Abstract
Continuous-wave ultrasonic modulation of scattered laser light has been used to image objects in tissue-simulating turbid media for the first time. We hypothesize that the ultrasound wave focused into the turbid media modulates the laser light passing through the ultrasonic focal spot. The modulated laser light collected by a photomultiplier tube reflects the local mechanical and optical properties in the focal zone. Buried objects in 5-cm thick tissue phantoms are located with millimeter resolution by scanning and detecting alterations of the ultrasound-modulated optical signal. Ultrasound-modulated optical tomography separates the conflict between signal and resolution in purely optical imaging of tissue and does not rely on ballistic or quasi-ballistic photons but on the abundant diffuse photons. The imaging resolution is determined by the focused ultrasonic wave. This technique has the potential to provide a noninvasive, nonionizing, inexpensive diagnostic tool for diseases such as breast cancer.
Additional Information
© 1995 Society of Photo-Optical Instrumentation Engineers (SPIE). The project was sponsored in part by The University of Texas M.D. Anderson Cancer Center grant, The Whitaker Foundation grant, Department of Energy grant, and National Institutes of Health grant.Attached Files
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Additional details
- Eprint ID
- 91622
- Resolver ID
- CaltechAUTHORS:20181207-161549603
- University of Texas at Austin
- Whitaker Foundation
- Department of Energy (DOE)
- NIH
- Created
-
2018-12-11Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 2626