RESUMEN
Discussed in the paper is a system of automatic exposition choice in a digital fluorograph designed by the "Gelpik" company, Moscow. The perspective equipment variation is as follows: intensifying screen + optic system + charge-communication device-matrix.
Asunto(s)
Fluoroscopía/instrumentación , Intensificación de Imagen Radiográfica/instrumentación , Pantallas Intensificadoras de Rayos XRESUMEN
A scheme of a technological lay-out is offered for the digital-fluorography examination room by the example of the modern "Renex-Fluoro" unit. Actual values of the room area are specified and recommended as standard.
Asunto(s)
Instituciones de Atención Ambulatoria/organización & administración , Fluoroscopía/instrumentación , Humanos , Calidad de la Atención de Salud , Intensificación de Imagen RadiográficaRESUMEN
The present paper deals with the theory and practice of controlling the measuring and deciphering properties of X-ray image. It describes the design and methods for using the original test object intended for an objective assessment of the spatial resolution and contrast sensitivity of X-ray apparatuses.
Asunto(s)
Radiografía/normas , Radiografía/métodos , Sensibilidad y EspecificidadRESUMEN
The paper deals with the theory and practice of digital X-ray diagnosis. The adverse factors of formation of a digital X-ray film are considered. They included geometric and dynamic blurrinesses, blurriness of an image receiver, and the contrast and dynamic range of digital image. Analysis of a great deal of clinical data shows the capacities of digital X-ray study to diagnose different forms of pulmonary tuberculosis and other thoracic diseases.
Asunto(s)
Intensificación de Imagen Radiográfica , HumanosRESUMEN
The results obtained by the method outlined in the paper for calculating dosimetric characteristics of a braking radiation spectrum are in rather good agreement with those of experimental studies and may be used for practical calculations instead of expensive and labour-consuming experimental methods for estimating the spectral characteristics of braking spectra.
Asunto(s)
Radiografía/instrumentación , Humanos , Modelos Teóricos , Dosis de Radiación , RadiometríaRESUMEN
An analytical expression (mathematical model) of the spectral distribution of braking radiation in the in tungsten anode X-ray tubes has been derived. The discrepancy of the calculated spectra with experimental findings is no more than +/- 6%.
Asunto(s)
Radiografía/instrumentación , Humanos , Modelos Teóricos , Radiografía/métodos , TungstenoRESUMEN
The paper outlines the design of a Russian Renex-Fluoro small-dose digital fluorograph and its operating principle. The capacities of digital fluorography in the diagnosis of different forms of pulmonary tuberculosis are considered. The data of a comparative statistical analysis of the diagnostic informative value of digital and film fluorography are given.
Asunto(s)
Fluoroscopía/instrumentación , Intensificación de Imagen Radiográfica/instrumentación , Radiografía Torácica , Tuberculoma/diagnóstico por imagen , Tuberculosis Ganglionar/diagnóstico por imagen , Tuberculosis Pulmonar/diagnóstico por imagen , Diagnóstico Diferencial , Humanos , Pleuresia/diagnóstico por imagen , Federación de RusiaRESUMEN
The paper deals with the introduction of computer technologies into X-ray equipment. It gives data on various digital hardware components for digital fluorography, characterizes the digital fluorographs made in Russia. A new approach to designing a digital fluorograph is proposed by changing mechanical scanning via the use of a special fluorographic chamber having a supersensitive matrix photodetector. This approach has been applied in designing a Renex-fluoro apparatus.