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Chromophore decomposition in multispectral time-resolved diffuse optical tomography.

Judy Zouaoui1, Laura Di Sieno2, Lionel Hervé1

  • 1Univ. Grenoble Alpes, F-38000 Grenoble, France, CEA, LETI, MINATEC Campus, F-38054 Grenoble, France.

Biomedical Optics Express
|October 31, 2017
PubMed
Summary
This summary is machine-generated.

Multispectral diffuse optical tomography can locate small objects in turbid media. However, accurately determining their exact material composition without prior information remains a challenge.

Keywords:
(030.5260) Photon counting(100.3010) Image reconstruction techniques(110.0113) Imaging through turbid media(110.6960) Tomography(170.6920) Time-resolved imaging(230.5160) Photodetectors

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Area of Science:

  • Biomedical Optics
  • Medical Imaging
  • Photonics

Background:

  • Diffuse optical tomography (DOT) is a non-invasive imaging technique.
  • Accurate quantification of tissue properties is crucial for diagnostic applications.

Purpose of the Study:

  • To assess multispectral time domain diffuse optical tomography (TD-DOT) in reflectance mode.
  • To evaluate its capability in quantifying position and composition of small heterogeneities.
  • To determine imaging performance at depths of 1-1.5 cm in scattering media.

Main Methods:

  • Utilized multicomponent phantoms with known optical properties.
  • Employed time-resolved data acquisition in reflectance geometry.
  • Analyzed time-resolved data using the Mellin-Laplace transform for inverse problem solving.

Main Results:

  • Demonstrated good spatial localization accuracy for embedded heterogeneities.
  • Showed correct qualitative assessment of compositional changes (gradation).
  • Observed limitations in achieving absolute material composition accuracy without prior geometric information.

Conclusions:

  • TD-DOT in reflectance mode shows promise for detecting and localizing subsurface anomalies.
  • Further advancements are needed to improve absolute compositional quantification in unknown geometries.
  • This technique holds potential for applications requiring detection of localized changes in scattering media.