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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 34 — Dec. 1, 2001
  • pp: 6367–6380

Simultaneous near-infrared diffusive light and ultrasound imaging

Nan Guang Chen, Puyun Guo, Shikui Yan, Daqing Piao, and Quing Zhu  »View Author Affiliations


Applied Optics, Vol. 40, Issue 34, pp. 6367-6380 (2001)
http://dx.doi.org/10.1364/AO.40.006367


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Abstract

We have constructed a near-real-time combined imager suitable for simultaneous ultrasound and near-infrared diffusive light imaging and coregistration. The imager consists of a combined hand-held probe and the associated electronics for data acquisition. A two-dimensional ultrasound array is deployed at the center of the combined probe, and 12 dual-wavelength laser source fibers (780 and 830 nm) and 8 optical detector fibers are deployed at the periphery. We have experimentally evaluated the effects of missing optical sources in the middle of the combined probe on the accuracy of the reconstructed optical absorption coefficient and assessed the improvements of a reconstructed absorption coefficient with the guidance of the coregistered ultrasound. The results have shown that, when the central ultrasound array area is in the neighborhood of 2 cm × 2 cm, which corresponds to the size of most commercial ultrasound transducers, the optical imaging is not affected. The results have also shown that the iterative inversion algorithm converges quickly with the guidance of a priori three-dimensional target distribution, and only one iteration is needed to reconstruct an accurate optical absorption coefficient.

© 2001 Optical Society of America

OCIS Codes
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.3830) Medical optics and biotechnology : Mammography
(170.5270) Medical optics and biotechnology : Photon density waves
(170.7170) Medical optics and biotechnology : Ultrasound

History
Original Manuscript: November 27, 2000
Revised Manuscript: July 24, 2001
Published: December 1, 2001

Citation
Nan Guang Chen, Puyun Guo, Shikui Yan, Daqing Piao, and Quing Zhu, "Simultaneous near-infrared diffusive light and ultrasound imaging," Appl. Opt. 40, 6367-6380 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-34-6367

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