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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 13 — Jun. 20, 2011
  • pp: 12261–12274

Signal detectability in diffusive media using phased arrays in conjunction with detector arrays

Dongyel Kang and Matthew A. Kupinski  »View Author Affiliations

Optics Express, Vol. 19, Issue 13, pp. 12261-12274 (2011)

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We investigate Hotelling observer performance (i.e., signal detectability) of a phased array system for tasks of detecting small inhomogeneities and distinguishing adjacent abnormalities in uniform diffusive media. Unlike conventional phased array systems where a single detector is located on the interface between two sources, we consider a detector array, such as a CCD, on a phantom exit surface for calculating the Hotelling observer detectability. The signal detectability for adjacent small abnormalities (2mm displacement) for the CCD-based phased array is related to the resolution of reconstructed images. Simulations show that acquiring high-dimensional data from a detector array in a phased array system dramatically improves the detectability for both tasks when compared to conventional single detector measurements, especially at low modulation frequencies. It is also observed in all studied cases that there exists the modulation frequency optimizing CCD-based phased array systems, where detectability for both tasks is consistently high. These results imply that the CCD-based phased array has the potential to achieve high resolution and signal detectability in tomographic diffusive imaging while operating at a very low modulation frequency. The effect of other configuration parameters, such as a detector pixel size, on the observer performance is also discussed.

© 2011 OSA

OCIS Codes
(000.5490) General : Probability theory, stochastic processes, and statistics
(030.6600) Coherence and statistical optics : Statistical optics
(290.7050) Scattering : Turbid media

ToC Category:
Coherence and Statistical Optics

Original Manuscript: March 10, 2011
Revised Manuscript: May 26, 2011
Manuscript Accepted: June 1, 2011
Published: June 9, 2011

Virtual Issues
Vol. 6, Iss. 7 Virtual Journal for Biomedical Optics

Dongyel Kang and Matthew A. Kupinski, "Signal detectability in diffusive media using phased arrays in conjunction with detector arrays," Opt. Express 19, 12261-12274 (2011)

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