Biomedical subjects
Publications and source records attributed to E A Kornev.
The results of spectrozonal roentgenographic study performed using a digital scanning fluorograph are presented. It is shown that organic inclusions visible in X-ray photographs made in different spectral ranges can be differentiated by the effective atomic number.
The design of a spectrozonal X-ray detector is described. Choice of spectral ranges for reproducing the color separation of X-ray images is under discussion. The research results of dependence of the quantum efficiency of registration of the spectrozonal detector on the quantum energy of X-ray radiation and on the design parameters of the converter are presented.
A method is described for determining the efficient atomic number of inclusion-tissue substance, visualized in image, by the characteristic angle estimated by means of spectronazal X-ray detector. Described are study results of the influence of inclusion's geometric dimensions and of the whole radiation filtration exerted on the value of characteristic angles for different substances. The experimental values of effective atomic numbers are shown to fit well, within the range limited by radiation contrast, the theoretical ones.
A short review of various approaches to determination of the effective energy of mixed X-ray beam is presented. An analytic expression for calculation of the effective energy of mixed X-ray beam as a function of X-ray tube anode voltage and filter thickness is derived. The results of calculation of the effective energy using the obtained analytic expression are shown to coincide well with the data of GOST R IEC 61267-2001.
A formula for assessing the error of calculation of the effective energy of combined X-ray beam is derived. Maximal error of calculation of the effective energy of combined X-ray beam is found to be (4% for anode voltage of 40-150 kV and aluminum filter thickness of 2-45 mm.
A method for calibration of X-ray diagnostic system equipped with a spectrozonal X-ray detector is described. Analytic expressions for calculation of the effective atomic number of the substance of inclusion tissue revealed in spectrozonal X-ray images are obtained.