Patent RU-2657940-C1 (RU)
Inventor: ARTYUSHENKO VYACHESLAV GRIGOREVICH
IPC: A61B5/01
Filed: 2017-05-02
Granted: 2018-06-18
Abstract: FIELD: medicine. 
     SUBSTANCE: group of inventions relates to medicine, namely to otorhinolaryngology, and can be used to diagnose maxillary sinus diseases and cysts. Proposed method for diagnosing maxillary sinuses of a patient comprises recording signals corresponding to two-dimensional distribution of intensity of light, passing through the tissue over the selected patient's face portion with at least two selected wavelengths of the visible and/or near infrared regions, extending from a light applicator comprising light sources and arranged so that the selected patient's face portion is located between light sources located in the oral cavity and a radiation intensity recording device. Thermovision image signal proportional to the two-dimensional distribution of intensity of infrared radiation over the selected patient's face portion in the middle infrared wavelength range of 8–12 microns is recorded. Subsequent digital processing of the distribution of registered signals is carried out and a two-dimensional display of the output signal proportional to digital processing result is formed, and the image of the selected portion is additionally recorded at the same previously selected wavelengths of the visible and/or near infrared region with diagnostic lights switched off. Digital processing comprises pointwise division of the intensity signal in the thermovision image into a root-mean-square sum of signals corresponding to a two-dimensional distribution of the light intensity values of each wavelength over the selected patient's face portion, and the light intensity values with diagnostic lights switched off are subtracted from said the light intensity values, and the resulting digital processing output is displayed as a two-dimensional distribution. Device for diagnosing maxillary sinuses comprises a light applicator with light sources of several selected wavelengths in the visible and near infrared regions, optical outputs of which are located and directed in the oral cavity so that their radiation passes through maxillary sinuses and/or cysts, as well as adjacent tissues. Device for recording diagnostic radiation intensity comprises a video camera of the visible and near infrared regions with an objective, a device for its dynamic focusing and an output of synchronization signals, thermovision camera of the middle infrared region, sensitive in the wavelength range of 8–12 microns, with an objective, a unit for its dynamic focusing and an output of synchronization signals, precision positioning unit of the device for recording diagnostic radiation intensity with respect to the selected patient’s face region, system for processing video camera signals and analyzing diagnostic information. Device also comprises a diagnostic information display system. Device further comprises a unit for mode selection and switching light sources with different wavelengths with an input of synchronization signals. System for processing video camera signals and analyzing diagnostic information comprises an additional unit for storing and subtracting images obtained when light sources are switched on and switched off, unit for determining a root-mean-square sum of signals after subtraction obtained at different wavelengths, two-input unit for pointwise division of the intensity signal in a thermovision image into a root-mean-square sum of the signals inputs of which are connected to the output of the thermovision camera and the unit for determining a root-mean-square sum of the signals. Outputs of synchronization signals are connected to inputs of synchronization signals of the unit for mode selection and switching light sources with different wavelengths. 
     EFFECT: group of inventions provides increased sensitivity and reliability of diagnosis of maxillary sinus diseases and cysts of a patient’s face. 
     9 cl, 2 dwg, 1 ex