Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10409486 | Optics & Laser Technology | 2016 | 9 Pages |
Abstract
Imaging method based on bio-speckles is a useful means for blood flow visualization of living bodies and, it has been utilized for analyzing the condition or the health state of living bodies. Actually, the sensitivity of blood flow is influenced by tissue optical properties, which depend on the wavelength of illuminating laser light. In the present study, we experimentally investigate characteristics of the blood flow images obtained with two wavelengths of 780Â nm and 830Â nm in the near-infrared region. Experiments are conducted for sample models using a pork layer, horse blood layer and mirror, and for a human wrist and finger, to investigate optical penetration depth and dynamic response of speckles to the blood flow velocity for two wavelengths.
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Engineering
Electrical and Electronic Engineering
Authors
Naomichi Yokoi, Yoshihisa Aizu,