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Optoacoustic tomography using time-resolved interferometric detection of surface displacement
Barry P Payne1, Vasan Venugopalan, Bora B Mikić
1Massachusetts Institute of Technology, Department of Mechanical Engineering, Cambridge, Massachusetts 02139, USA.
Journal of Biomedical Optics
|April 10, 2003
Summary
We developed a new minimally invasive optoacoustic imaging method using light and sound waves to see inside turbid tissues. This technique can detect subsurface blood vessels in real-time for medical imaging applications.
Area of Science:
- Biomedical Optics
- Acoustic Imaging
- Medical Imaging
Background:
- Optoacoustic imaging offers high contrast for biological tissues.
- Imaging deep within turbid media remains challenging due to light scattering.
- Thermoelastic stress transients can propagate as detectable waves.
Purpose of the Study:
- To introduce a minimally invasive optoacoustic imaging technique for turbid media.
- To utilize optical interferometry for detecting surface displacement caused by thermoelastic stress.
- To image subsurface absorbers in heterogeneous tissues.
Main Methods:
- Employing optical interferometric detection of surface displacement.
- Utilizing time-resolved, high-resolution interferometry with angstrom-level displacement resolution.
- Leveraging endogenous or exogenous optical contrast and low stress wave attenuation.
Main Results:
- Successfully localized and imaged subsurface absorbers in optically turbid media.
- Demonstrated detection of subsurface blood vessels in tissue phantoms.
- Validated the technique in vivo on a human forearm.
Conclusions:
- The developed technique provides a novel approach for minimally invasive optoacoustic imaging.
- High-resolution interferometry enables sensitive detection of stress transients for subsurface imaging.
- This method holds promise for enhanced biomedical imaging of heterogeneous tissues.