Abstract

Laser Microbeam and Medical Program (LAMMP) facilities provide access to a multi-frequency, Frequency-Domain Photon Migration (FDPM) system which has proven its ability to extract optical properties, scattering and absorption, from a single-distance measurement on tissue-like phantoms and in vivo on human tissues. We, at EPFL (Dr. Depeursinge's group), have developed a Spatially-Resolved Photon Migration (SRPM) probe which allows local optical property measurements of biological tissues. Our current data analysis procedure is based upon comparisons of measurements to results of Monte Carlo numerical simulations. We propose to conduct combined experimental studies, using the LAMMP FDPM apparatus and clinical resources, to define an optimal photon migration system capable of deriving accurately the optical properties of complex, inhomogeneous tissues. This study involves 1) a quantitative determination of the volume of tissue interrogated in each technique; 2) an experi mental study on tissue-like layered solid phantoms in order to assess our ability to optically characterize each layer independently by using our combined setup; 3) the design of an optimal system (probe + inversion model) according to a thorough analysis of the potential advantages of frequency modulation at short distances (

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR001192-23
Application #
6586479
Study Section
Project Start
2002-04-01
Project End
2003-03-31
Budget Start
Budget End
Support Year
23
Fiscal Year
2002
Total Cost
Indirect Cost

  Institution

Name
University of California Irvine
Department
Type
DUNS #
161202122
City
Irvine
State
CA
Country
United States
Zip Code
92697

  Publications

Paugh, Jerry R; Alfonso-Garcia, Alba; Nguyen, Andrew Loc et al. (2018) Characterization of expressed human meibum using hyperspectral stimulated Raman scattering microscopy. Ocul Surf :
Verdel, Nina; Lentsch, Griffin; Balu, Mihaela et al. (2018) Noninvasive assessment of skin structure by combined photothermal radiometry and optical spectroscopy: coregistration with multiphoton microscopy. Appl Opt 57:D117-D122
Friedman, Jacob E; Dobrinskikh, Evgenia; Alfonso-Garcia, Alba et al. (2018) Pyrroloquinoline quinone prevents developmental programming of microbial dysbiosis and macrophage polarization to attenuate liver fibrosis in offspring of obese mice. Hepatol Commun 2:313-328
Kennedy, Gordon T; Lentsch, Griffin R; Trieu, Brandon et al. (2017) Solid tissue simulating phantoms having absorption at 970 nm for diffuse optics. J Biomed Opt 22:76013
Takesh, Thair; Sargsyan, Anik; Lee, Matthew et al. (2017) Evaluating the Whitening and Microstructural Effects of a Novel Whitening Strip on Porcelain and Composite Dental Materials. Dentistry (Sunnyvale) 7:
Jonscher, Karen R; Stewart, Michael S; Alfonso-Garcia, Alba et al. (2017) Early PQQ supplementation has persistent long-term protective effects on developmental programming of hepatic lipotoxicity and inflammation in obese mice. FASEB J 31:1434-1448
Alfonso-García, Alba; Paugh, Jerry; Farid, Marjan et al. (2017) A machine learning framework to analyze hyperspectral stimulated Raman scattering microscopy images of expressed human meibum. J Raman Spectrosc 48:803-812
Takesh, Thair; Sargsyan, Anik; Anbarani, Afarin et al. (2017) Effects of a Novel Whitening Formulation on Dental Enamel. Dentistry (Sunnyvale) 7:
Malacrida, Leonel; Astrada, Soledad; Briva, Arturo et al. (2016) Spectral phasor analysis of LAURDAN fluorescence in live A549 lung cells to study the hydration and time evolution of intracellular lamellar body-like structures. Biochim Biophys Acta 1858:2625-2635
Choi, Bernard; Tan, Wenbin; Jia, Wangcun et al. (2016) The Role of Laser Speckle Imaging in Port-Wine Stain Research: Recent Advances and Opportunities. IEEE J Sel Top Quantum Electron 2016:

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