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Proceedings Paper

Structural characterization of hair fiber by optical coherence tomography (OCT)
Author(s): Anderson Zanardi Freitas; Maria Valeria Robes Velasco; Marcus Paulo Raele; Telma Mary Kaneko; Nilson Dias Vieira; Andre Rolim Baby
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Paper Abstract

In this work we use the optical coherence tomography (OCT) technique to produce in vitro transversal section images of human hair. It was possible to identify in the A-scan protocol its principal structures: cuticle, cortex and medulla. The mean diameter of medulla was 29 ± 7 μm and hair diameter was 122 ± 16 μm in our samples of standard Afro-ethnic hair. We also compared the OCT signal before and after chemical treatment with 18% w/w ammonium thioglycolate solution. After chemical treatment, it was not possible to identify the main structures of hair fiber, due the index matching promoted by deleterious action of chemical agent. A tridimensional image was built starting from 601 cross-sectional images (slices). Each slice was taken in steps of 6.0 μm at 8 frames per second, and the whole 3D image was built in 60 seconds.

Paper Details

Date Published: 30 December 2008
PDF: 7 pages
Proc. SPIE 7139, 1st Canterbury Workshop on Optical Coherence Tomography and Adaptive Optics, 71390L (30 December 2008); doi: 10.1117/12.814948
Show Author Affiliations
Anderson Zanardi Freitas, Instituto de Pesquisas Energéticas e Nucleares (Brazil)
Maria Valeria Robes Velasco, Univ. de São Paulo (Brazil)
Marcus Paulo Raele, Instituto de Pesquisas Energéticas e Nucleares (Brazil)
Telma Mary Kaneko, Univ. de São Paulo (Brazil)
Nilson Dias Vieira, Instituto de Pesquisas Energéticas e Nucleares (Brazil)
Andre Rolim Baby, Univ. de São Paulo (Brazil)


Published in SPIE Proceedings Vol. 7139:
1st Canterbury Workshop on Optical Coherence Tomography and Adaptive Optics
Adrian Podoleanu, Editor(s)

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