Волоконно-оптична телемедична мережа для обміну відеозображеннями

Abstract

The dissertation presents the results of research on improving the efficiency of exchange of medical video images in the fiber optic telemedicine network by developing its structure, model and methods of construction. The subject of the research is communication channels and procedures for obtaining and generating visual diagnostic information from various types of equipment for introscopic diagnostics. A model of the information transmission process in the fiber-optic tract of the telemedicine network has been developed, which determines the optical losses and the dispersion of the signal in the fiber-optic environment, compensates for them and generates a signal that can, depending on the type of fiber, overcome the maximum distance with minimal time distortions and losses. The approach to creating a fiber-optic telemedicine network for the exchange of medical video images in DICOM 3.0 standard, obtained from different types of medical equipment for radiodiagnosis and telemedicine centers, was further developed, which allowed to define the information space of the network as a complex hierarchical environment in which each level of information is characterized by, software and hardware to process and interpret the information received. A fiber-optic telemedicine network is proposed to provide for the exchange of operational results of telemedicine diagnostics and monitoring of patients' health status through optical communication channels between remote areas and the regional center and, unlike the existing ones, provides its adaptation to the DICOM standard, information support for decision-making, a flexible network management system that complies with patient data protection requirements. he method of two-wave transmission of medical digital data was further developed by presenting a digital logical signal with an optical pulse simultaneously at two wavelengths λ1 = 1310 nm and λ2 = 1550 nm, the choice of which was made based on the conditions of minimum dispersion and minimized loss of silica glass, which reduced the effect of interference and increased the signal-to-noise level and stability of the transmission of biomedical information and received further development of the approach to creating a fiber telemedicine network for the exchange of medical images in DICOM 3.0 standard, derived from different types of medical equipment for radiation diagnosis and telemedicine centers, allowing to determine the information area network as a complex hierarchical environment in which each layer is characterized by its own information, software and hardware to process and interpret the information received. The development of a fiber-optic communication channel for the exchange of telemedical information based on the model of the information channel for transmitting telemedicine data with the additional introduction of optical amplifiers with automatic gain control (AGC) and an optical cable automatic control and diagnostic unit into its structure provided remote automatic control and diagnostics of the cable status with accurate determination of the location and nature of the damage, the binding of reflectors to a geographical map of the area and analysis of changes changes in the parameters of VOC over time, which ultimately increased the reliability and quality of the transfer of biomedical information. A comparative analysis of the developed fiber-optic telemedicine network and its closest analogues confirmed its full compliance with the "Recommendations on Compatibility of National Consultative Telemedicine Networks of the CIS Member States" (Baku, May 23, 2005), which provided the solution of two basic problems of telemedicine: transformation of different telemedicine data obtained from telephony center patients via fiber optic digital communication without loss of quality and completion of digital databases th diagnostic information. According to the results of the DICOM 3.0 information transfer calculations on the developed VOTM and its analogs, it is established that the first kind of error was reduced from 3.4% to 1.3% for the developed network; the second kind of error reached the value of 3.8% (at analogues not less than 6.7%), and the error of information transmission - 98.7%