SU1704759A1 - Method for examining skin and internal organ surfaces - Google Patents

Abstract

The invention relates to optical measurement methods, and more specifically to methods for studying the pathological processes of the skin and the surfaces of internal organs according to their color characteristics. The invention solves the problem of increasing the accuracy of the survey results. The method consists in examining the skin and the surfaces of internal organs by optical methods by measuring their reflective properties. To solve the problem in the method under the selected lighting and observation conditions, the light source and using the colorimetric observer addition functions, color coordinates or derived characteristics of the test object are measured using a colorimeter, and the same characteristics of the object of comparison are calculated under the same conditions function that characterizes the trend of measurements in the body during the examination, according to the formula specified in the description, and the degree of function determines the degree of change in the process All examinations. 1 hp f-ly, 2 silt ,, 1 tab. fe

Description

The invention relates to optical measurement methods, and more specifically to methods for studying the pathological processes of the skin and the surfaces of internal organs according to their color characteristics.

The aim of the proposed method is to increase the accuracy of the survey results.

This goal is achieved due to the fact that the survey is carried out using a colorimeter, which measures the color characteristics of objects in the standard color classification system.

The method is carried out as follows.

Initially, the spectrocolorimeter is set up, and black and white reference samples are alternately installed to the measuring hole of the external head, the reflection coefficients of which are recorded in the computer memory installed in the measuring unit. This procedure takes v20 with. Next, the head is positioned close to the measurable part of the investigated surface of the organ and the color coordinates and other color characteristics are measured. To track the dynamics of the skin process, periodic color measurements are made at intervals of one to two days, while calculating function B.

Vj

2

vj SL Yu

)

100%,

where Bt is the trend of change;

At and AO are one of the selected color characteristics at time t from the beginning of the survey and are similar to the characteristics of the object of comparison, respectively.

For the object of comparison, a neighboring healthy skin area can be selected.

Example. Patient F., 70 years old, retired, entered 15 / VIII 1987 for inpatient treatment at the dermatovenerologic dispensary in Chirchik with complaints of skin lesions and itching.

The skin process is localized in the middle third of the left tibia, where there is a lesion with irregular borders, 5x5 cm in size. Against the background of edematous, richly hyperemic skin, there are nodules, microvesicles, pustules, hemorrhagic and purulent crusts. After removal of the crusts, the surface is moist with microerosion separating the serous exudate. Around the focus is the collar of the exfoliating epidermis, the skin is demeaningly hyperemic.

The measurements were carried out using a Spectroton portable spectrocolorimeter (TU 5P 1.600.001) with an external photometric sensor with a differential geometry measurement of / 8 °, taking into account the specular reflection component at a type C light source in the MKO 1931 system.

The sensor is connected to the device with a light guide cable, therefore it can easily be attached to any point of the skin under study. When the Start button is pressed, the test area is subjected to short-term irradiation with light from an ISK-25 flash lamp (the duration of the irradiation is 1 ms). The reflected light flux is analyzed by spectral composition at 24 wavelengths in the visible spectrum 380-720 nm. The integrated micro-computer calculates spectral aperture reflection coefficients, color coordinates and

chromaticity in the systems XYZ, LAB, color tone, saturation, whiteness, as well as color differences.

The dynamics of changes in the color coordinates in the lesion in the course of treatment and the color of the adjacent healthy skin area of patient F. are shown in the table.

The color coordinates of a healthy area of the skin during the treatment have changed by an amount practically not exceeding the error of the measuring instrument, therefore, for simplicity, the table shows their average values.

The calculated values of B for each of the coordinates are plotted in FIG. 1 and FIG. 2

Note: When calculating Bt before color differences, it is necessary to use their maximum value as AO.

Thus, the positive effect of the proposed method is to improve the accuracy of the results of the examination of patients.

Claims (1)

The invention of the method of examining the skin and the surface of internal organs by optical measurement of an object, characterized in that, in order to improve the accuracy of the method, the coordinates of color and chromaticity, hue, saturation, lightness, whiteness of the object of study and the same characteristics of the control object are measured the subsequent calculation of the degree W of the pathological process according to the formula (AT / A j x100%, where Am is the coordinate value of color, chromaticity, hue, saturation, lightness, whiteness of the object of study; AO - the same control object. ° / / °  v-ty; Btz s-ti 40 w 20 ten  L i i 1 2 3 4 5 6 7 8 9 10 11 12 FIG. one i 80 60 1234 5 6 7 in FIG. 2 9 10 11 12