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Localization of embedded inclusions using detection of fluorescence: Feasibility study based on simulation data, LS-SVM modeling and EPO pre-processing

Chauchard, Fablen; Svensson, Jenny LU ; Axelsson, Johan LU ; Andersson-Engels, Stefan LU and Roussel, Sylvie (2008) In Chemometrics and Intelligent Laboratory Systems 91(1). p.34-42
Abstract
Fluorescence spectroscopy is a useful technique for tissue diagnostics and is also a promising tool in the characterization of embedded structures in tissue. The emitted fluorescence from an embedded inclusion, marked with a fluorescent compound, is affected by several factors as the light propagates through the medium to the tissue boundary, where the fluorescence light is detected. Tissue absorption, scattering and autofluorescence, as well as the size and depth of the inclusion, affect the detected fluorescence light. The aim of this study is to investigate if the size and location of a fluorescent inclusion could be determined using models based a combination of External Parameter Orthogonalisation (EPO) and Least Squares Support... (More)
Fluorescence spectroscopy is a useful technique for tissue diagnostics and is also a promising tool in the characterization of embedded structures in tissue. The emitted fluorescence from an embedded inclusion, marked with a fluorescent compound, is affected by several factors as the light propagates through the medium to the tissue boundary, where the fluorescence light is detected. Tissue absorption, scattering and autofluorescence, as well as the size and depth of the inclusion, affect the detected fluorescence light. The aim of this study is to investigate if the size and location of a fluorescent inclusion could be determined using models based a combination of External Parameter Orthogonalisation (EPO) and Least Squares Support Vector Machine (LS-SVM). This can be very useful for data pre-processing before a full fluorescence tomography reconstruction. The data set consisted of simulated multispectral fluorescence, where depth and radius of a spherical fluorescent inclusion were varied as well as the fluorescence contrast and optical properties of the surrounding tissue. The results showed that the non-linear models based on LS-SVM can simultaneously predict both radius and depth. It was observed that EPO acts as a useful pre-processing tool on spectra for this nonlinear model and that it was necessary to perform EPO to be able to predict the depth with the LS-SVM model. (C) 2007 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
embedded, non-linearity, LS-SVM, external parameter orthogonalisation, multivariate analysis, multispectral, fluorescence spectroscopy, lesions, fluorescence tomography
in
Chemometrics and Intelligent Laboratory Systems
volume
91
issue
1
pages
34 - 42
publisher
Elsevier
external identifiers
  • wos:000254819400006
  • scopus:39749196097
ISSN
0169-7439
DOI
10.1016/j.chemolab.2007.08.008
language
English
LU publication?
yes
id
3d9a78c7-f66a-48c9-9920-ea7c44b1e121 (old id 1207312)
date added to LUP
2008-08-27 14:28:48
date last changed
2017-08-13 04:05:13
@article{3d9a78c7-f66a-48c9-9920-ea7c44b1e121,
  abstract     = {Fluorescence spectroscopy is a useful technique for tissue diagnostics and is also a promising tool in the characterization of embedded structures in tissue. The emitted fluorescence from an embedded inclusion, marked with a fluorescent compound, is affected by several factors as the light propagates through the medium to the tissue boundary, where the fluorescence light is detected. Tissue absorption, scattering and autofluorescence, as well as the size and depth of the inclusion, affect the detected fluorescence light. The aim of this study is to investigate if the size and location of a fluorescent inclusion could be determined using models based a combination of External Parameter Orthogonalisation (EPO) and Least Squares Support Vector Machine (LS-SVM). This can be very useful for data pre-processing before a full fluorescence tomography reconstruction. The data set consisted of simulated multispectral fluorescence, where depth and radius of a spherical fluorescent inclusion were varied as well as the fluorescence contrast and optical properties of the surrounding tissue. The results showed that the non-linear models based on LS-SVM can simultaneously predict both radius and depth. It was observed that EPO acts as a useful pre-processing tool on spectra for this nonlinear model and that it was necessary to perform EPO to be able to predict the depth with the LS-SVM model. (C) 2007 Elsevier B.V. All rights reserved.},
  author       = {Chauchard, Fablen and Svensson, Jenny and Axelsson, Johan and Andersson-Engels, Stefan and Roussel, Sylvie},
  issn         = {0169-7439},
  keyword      = {embedded,non-linearity,LS-SVM,external parameter orthogonalisation,multivariate analysis,multispectral,fluorescence spectroscopy,lesions,fluorescence tomography},
  language     = {eng},
  number       = {1},
  pages        = {34--42},
  publisher    = {Elsevier},
  series       = {Chemometrics and Intelligent Laboratory Systems},
  title        = {Localization of embedded inclusions using detection of fluorescence: Feasibility study based on simulation data, LS-SVM modeling and EPO pre-processing},
  url          = {http://dx.doi.org/10.1016/j.chemolab.2007.08.008},
  volume       = {91},
  year         = {2008},
}