Abstract
Human tissue is one of the most complex optical media since it is turbid and nonhomogeneous. We suggest a new optical method for sensing physiological tissue state, based on the collection of the ejected light at all exit angles, to receive the full scattering profile. We built a unique set-up for noninvasive encircled measurement. We use a laser, a photodetector and finger tissues-mimicking phantoms presenting different optical properties. Our method reveals an isobaric point, which is independent of the optical properties. We compared the new finger tissues-like phantoms to others samples and found the linear dependence between the isobaric point's angle and the exact tissue geometry. These findings can be useful for biomedical applications such as non-invasive and simple diagnostic of the fingertip joint, ear lobe and pinched tissues.
Highlights
Human tissue is one of the most complex optical media since it is turbid and nonhomogeneous
We suggest a new optical method for sensing physiological tissue state, based on the collection of the ejected light at all exit angles, to receive the full scattering profile
Our method reveals an isobaric point, which is independent of the optical properties
Summary
Human tissue is one of the most complex optical media since it is turbid and nonhomogeneous. Optical methods of sensing physiological tissue state based on light-tissue interactions are non-invasive, inexpensive and simplistic and are very useful. Most of the optical methods focus on the reflected light from the tissue [1,2,3,4,5,6], which is described as a semi-infinite medium, while very few use the transmitted light [7,8,9]. We suggest a new optical method for sensing the physiological state of cylindrical tissues. This method is based on the collection of the ejected light at all exit angles, to receive the full scattering profile (FSP), which is the angular distribution of light intensity. The scattered light from cylindrical tissues such as fingertip, earlobe or any pinched tissue is a signature of the whole tissue
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