Study of biological objects in the reflected light with the help of an analogous fiber optic biophotometer

Abstract

The study of biological objects in the reflected light withthe help of analogous fiber-optic biophotometerM. I. Gaiduk, V. V. Grigoryants, I. V. Chernousovaand V. D. MenenkovInstitute of Radio Engineering and Electronics of the USSRAcademy of Sciences, 103907, GSP, Av. Marx 18, Moscow, USSRAt present in many fields of medicine wide use is made of diagnosis methods based on measurement of the opticalcharacteristics of biological objects (BO). One of these is a photometric method which allows us to distinguishbetween sound and malignant tissues due to different reflection indices when these tissues are probed with radiationin a narrow spectral range.'To date the photometry methods of data processing consist of a comparison of the radiation flux reflected froma BO with that reflected from a reference plate with a definite reflection index at the probing wavelength. Howeversuch a result can not be regarded as an objective indication in the comparison of photometric data for a BO withdifferent optical characteristics, since the methods of comparison do not take into account the peculiarities of theBO itself (tissue color, age, state of the BO at the moment of its investigation, etc.).To eliminate the influence of specific factors of the BO on the value of the reflection index, a biological referencepoint method was proposed which consists of the measurement of the ratio between the radiation fluxes, one ofwhich is reflected from the pathologic tissue, and the other from the BO region which is sufficiently far from thefirst and is less likely to be influenced by various effects.2To obtain a general normalized reflection index c