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Li, X.* ; Dinish, U.S.* ; Aguirre, J.* ; Bi, R.* ; Dev, K.* ; Binte Ebrahim Attia, A.* ; Nitkunanantharajah, S.* ; Hann Qian, L.* ; Schwarz, M.* ; Yew, Y.W.* ; Guan, S.T.T.* ; Ntziachristos, V. ; Olivo, M.*

Optoacoustic mesoscopy analysis and quantitative estimation of specific imaging metrics in Fitzpatrick skin phototypes II to V.

J. Biophotonics 12:e201800442 (2019)
Postprint DOI PMC
Open Access Green
Raster Scanning Optoacoustic Mesoscopy (RSOM) is a novel optoacoustic imaging modality that offers non-invasive, label-free, high resolution (~7 mu m axial, ~30 mu m lateral) imaging up to 1 to 2 mm below the skin, providing novel quantitative insights into skin pathophysiology. As the RSOM image contrast mechanism is based on light absorption, it is expected that the amount of melanin present in the skin will affect RSOM images. However, the effect of skin tone in the performance of RSOM has not been addressed so far. Herein, we present the efficiency of RSOM for in vivo skin imaging of human subjects with Fitzpatrick (FP) skin types between II to V. RSOM images acquired from the volar forearms of the subjects were used to derive metrics used in RSOM studies, such as total blood volume, vessel diameter and melanin signal intensity. Our study shows that the melanin signal intensity derived from the RSOM images exhibited an excellent correlation with that obtained from a clinical colorimeter for the subjects of varying FP skin types. We could successfully estimate the vessel diameter at different depths of the dermis. Furthermore, our study shows that there is a need to compensate for total blood volume calculated for subjects with higher FP skin types due to the lower signal-to-noise ratio in dermis, owing to strong absorption of light by melanin. This study sheds light into how RSOM can be used for studying various skin conditions in populations with different skin phenotypes.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Fitzpatrick Skin Types ; Melanin Signal Intensity ; Raster Scanning Optoacoustic Mesoscopy ; Total Blood Volume ; Vessel Diameter; Blood Oxygenation; Tomography; Ultrastructure; Deep; Microcirculation; Frequency
ISSN (print) / ISBN 1864-063X
e-ISSN 1864-0648
Journal Journal of Biophotonics
Quellenangaben Volume: 12, Issue: 9, Pages: , Article Number: e201800442 Supplement: ,
Publisher Wiley
Publishing Place Postfach 101161, 69451 Weinheim, Germany
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Biological and Medical Imaging (IBMI)