The photoplethysmograph has been used for over 50 years but there are still
misconceptions in how and what is the information obtained. A photoplethysmograph signal …

An integrated review of the transfer of optical radiation into human skin is presented, aimed
at developing useful models for photomedicine. The component chromophores of epidermis …

Basic theoretical considerations of the optical and thermal transfer processes that govern the
thermal damage induced in tissue by lasers are discussed. An approximate, predictive …

A goniometric apparatus is presented for measuring the angular dependence of scattering of
a HeNe laser beam by in vitro human dermis samples of various thicknesses, hydrated to an …

A discussion is presented of diagnostic and dosimetric optical measurements in medicine
and biology. Topics covered include: tissue optical properties, tissue boundary conditions …

• Light reflected from skin has two components: regular reflectance, or" glare" arising from
the surface, and light backscattered from within the tissue. The regular reflectance contains …

Despite the many years since optical spectra from human skin were first obtained, only
recently have quantitative models of cutaneous optics been applied. This chapter aims to …

Recognition of facial expressions has been widely explored to represent people's emotional
states. Existing facial expression recognition systems primarily rely on external cameras …

This paper is the first of two reviewing the propagation of electromagnetic radiation of
wavelength 0.25–10 μ m in tissue. After a brief discussion of light/tissue interactions, a …

Despite of the approval of Photofrin® in various countries, chemically defined sensitizers for
photodynamic therapy (PDT) are still needed for the absorption of light in the infrared …