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1 January 1998 Optical medical diagnostic and imaging
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We consider imaging a spherical inhomogeneity (object) imbedded in a scattering and absorbing medium. We use the Bayesian approach to study the error bars on the parameters to be reconstructed (volume, absorption and scattering coefficients), and on combinations of them. We study the characterization threshold, i.e. the minimum size of the object permitting its characterization with a reasonable accuracy. We are interested in (1) absorbing and scattering spheres versus purely absorbing or purely scattering ones; (2) modulated (frequency-domain) versus CW illumination. We show that CW illumination cannot characterize absorbing and scattering-objects except for very large sizes. We demonstrate that a significant reduction of the characterization threshold can be obtained if complete characterization is replaced by a partial one, giving information only on the nature (absorbing versus scattering) of the object.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Guy Ledanois and Jean A. Virmont "Optical medical diagnostic and imaging", Proc. SPIE 3194, Photon Propagation in Tissues III, (1 January 1998);

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