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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 34 — Dec. 2, 2002
  • pp: 7325–7333

Adaptive calibration for object localization in turbid media with interfering diffuse photon density waves

Yu Chen, Chenpeng Mu, Xavier Intes, and Britton Chance  »View Author Affiliations


Applied Optics, Vol. 41, Issue 34, pp. 7325-7333 (2002)
http://dx.doi.org/10.1364/AO.41.007325


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Abstract

The amplitude cancellation method that uses dual out-of-phase sources (a phased array system) can sensitively detect and locate small objects in turbid media. The balance of these two sources is crucial to the system’s detection sensitivity and accuracy. We describe a convenient method with which to adaptively calibrate the amplitudes of the two sources at each scanning position by use of low-frequency modulation of the intensity of the in-phase and the antiphase sources. We achieve accurate localization ability of the phased array system by accounting for the influence of asymmetrical boundaries and the heterogeneous background absorption. Experimental data on human breast phantoms demonstrate that localization accuracy within several millimeters has been accomplished through this method.

© 2002 Optical Society of America

OCIS Codes
(110.5100) Imaging systems : Phased-array imaging systems
(170.3660) Medical optics and biotechnology : Light propagation in tissues
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(170.5270) Medical optics and biotechnology : Photon density waves
(170.5280) Medical optics and biotechnology : Photon migration
(170.7050) Medical optics and biotechnology : Turbid media

History
Original Manuscript: March 7, 2002
Revised Manuscript: September 4, 2002
Published: December 1, 2002

Citation
Yu Chen, Chenpeng Mu, Xavier Intes, and Britton Chance, "Adaptive calibration for object localization in turbid media with interfering diffuse photon density waves," Appl. Opt. 41, 7325-7333 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-34-7325

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