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Malekzadeh Najafabadi, J.* ; Prakash, J. ; Ntziachristos, V.

Nonlinear optoacoustic readings from diffusive media at near-infrared wavelengths.

J. Biophotonics 11:e201600310 (2018)
Postprint DOI PMC
Open Access Green
Optoacoustic (photoacoustic) imaging assumes that the detected signal varies linearly with laser energy. However, nonlinear intensity responses as a function of light fluence have been suggested in optoacoustic microscopy, that is, within the first millimeter of tissue. In this study, we explore the presence of nonlinearity deeper in tissue (similar to 4 mm), as it relates to optoacoustic mesoscopy, and investigate the fluence required to delineate a switch from linear to nonlinear behavior. Optoacoustic signal nonlinearity is studied for different materials, different wavelengths and as a function of changes in the scattering and absorption coefficient of the medium imaged. We observe fluence thresholds in the mJ/cm(2) range and preliminary find that different materials may exhibit different nonlinearity patterns. We discuss the implications of nonlinearity in relation to image accuracy and quantification in optoacoustic tomography.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Nonlinearity ; Optical Imaging ; Optical Parameters ; Optoacoustic (photoacoustic) Imaging; Microscopy; Mesoscopy
Sprache englisch
Veröffentlichungsjahr 2018
Prepublished im Jahr 2017
HGF-Berichtsjahr 2017
ISSN (print) / ISBN 1864-063X
e-ISSN 1864-0648
Zeitschrift Journal of Biophotonics
Quellenangaben Band: 11, Heft: 1, Seiten: , Artikelnummer: e201600310 Supplement: ,
Verlag Wiley
Verlagsort Weinheim
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Biological and Medical Imaging (IBMI)
POF Topic(s) 30205 - Bioengineering and Digital Health
Forschungsfeld(er) Enabling and Novel Technologies
PSP-Element(e) G-505500-001
DOI 10.1002/jbio.201600310
WOS ID WOS:000425294600017
Scopus ID 85040774046
PubMed ID 28787111
Erfassungsdatum 2017-09-06
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