Frequency-domain measurements of photon migration in highly scattering media

1993 ◽  
Author(s):  
Enrico Gratton
Keyword(s):  
Frequency Domain ◽  
Photon Migration ◽  
Scattering Media

scholarly journals Localization of absorbers in scattering media by use of frequency-domain measurements of time-dependent photon migration

1994 ◽  
Vol 33 (16) ◽  
pp. 3562 ◽  
Author(s):  
E. M. Sevick ◽  
J. K. Frisoli ◽  
C. L. Burch ◽  
J. R. Lakowicz
Keyword(s):  
Frequency Domain ◽  
Time Dependent ◽  
Photon Migration ◽  
Scattering Media

Measurement of the fluorescence lifetime in scattering media by frequency-domain photon migration

1999 ◽  
Vol 38 (22) ◽  
pp. 4930 ◽  
Author(s):  
Ralf H. Mayer ◽  
Jeffery S. Reynolds ◽  
Eva M. Sevick-Muraca
Keyword(s):  
Frequency Domain ◽  
Fluorescence Lifetime ◽  
Photon Migration ◽  
Scattering Media

scholarly journals Sampling tissue volumes using frequency-domain photon migration

2004 ◽  
Vol 69 (5) ◽  
Author(s):  
Frédéric Bevilacqua ◽  
Joon S. You ◽  
Carole K. Hayakawa ◽  
Vasan Venugopalan
Keyword(s):  
Frequency Domain ◽  
Photon Migration

Optical Tomography With a Least Square Finite Element Formulation of the Collimated Irradiation in Frequency Domain

2010 ◽  
Author(s):  
Olivier Balima ◽  
Joan Boulanger ◽  
Andre´ Charette ◽  
Daniel Marceau
Keyword(s):  
Finite Element ◽  
Optical Properties ◽  
Frequency Domain ◽  
Complex Geometry ◽  
Numerical Study ◽  
Optical Tomography ◽  
Least Square ◽  
Finite Element Formulation ◽  
Element Formulation ◽  
Scattering Media

This paper presents a numerical study of optical tomography in frequency domain for the reconstruction of optical properties of scattering and absorbing media with collimated irradiation light sources. The forward model is a least square finite element formulation of the collimated irradiation problem where the intensity is separated into its collimated and scattered parts. This model does not use any empirical stabilization and moreover the collimated source direction is taken into account. The inversion uses a gradient type minimization method where the gradient is computed through an adjoint formulation. Scaling is used to avoid numerical round errors, as the output readings at detectors are very low. Numerical reconstructions of optical properties of absorbing and scattering media with simulated data (noised and noise-free) are achieved in a complex geometry with satisfactory results. The results show that complex geometries are well handled with the proposed method.

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