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Biomedical subjects

L V Vladimirov

Publications and source records attributed to L V Vladimirov.

At least 19 recordsLinked to original sources
PubMedDate not supplied

[A radiation method of determining the voltage of x-ray radiation generation. Its status and the outlook].

The paper reviews currently available methods for noninvasive determination of the voltage of X-ray radiation generation. It describes their advantages and disadvantages. The technical data of some commercially produced devices are presented. The paper shows it necessary to develop a standard for noninvasive X-ray tube voltage control and describes the main points of the standard presently developed in the framework of the International Electrical Committee 62C.

Calibration↗
PubMedDate not supplied

[A small-sized ID-02M X-ray dosimeter for measuring radiation output].

The paper presents a portable small-sized [symbol: see text]-02 X-ray dosimeter designed at the Research Institute of Introscopy, Spektr Moscow Research Production Association, for measuring the radiation output of X-ray diagnostic apparatuses for general and special uses. An aquadag electrode ionization chamber is used as a radiation detector. The technical data of the dosimeter are given.

Equipment Design↗
PubMedDate not supplied

[The ID-03 X-ray dosimeter for monitoring the radiation parameters of X-ray equipment in roentgenography].

The paper presents an [symbol: see text]-03 X-ray dosimeter designed by the Research Institute of Introscopy, Spektr Moscow Research-and-Production Association, for monitoring the radiation parameters of X-ray plants at roentgenography. A Si(Li)-based semiconductor detector with the p-i-n structure is used as a detector of X-ray radiation. The technical data of the dosimeter are given.

Equipment Design↗
PubMedDate not supplied

[A portable miniature IMD-01 X-ray dosimeter for monitoring the dose power in radiodiagnosis].

The paper presents a portable miniature [symbol: see text]-01 X-ray dosimeter designed by the Research Institute of Introscopy, Spektr Moscow Research-and-Production Association, for monitoring the power of a dose during X-ray diagnosis. The device ensures the monitoring of the power of a dose at the input of X-ray detectors of diagnostic apparatuses and, with the use of special methods, makes it possible to control the state of the protection devices of X-ray diagnostic apparatuses. An ionization chamber is used as a detector of X-ray radiation. The technical data of the dosimeter are given.

Equipment Design↗
PubMedDate not supplied

[Portable small size X-ray dosimeter DER-01M designed for dose control and its intensity in X-ray diagnostics].

Described in the paper is a portable small-size X-ray dosimeter DER-0.1 M designed by the Research Institute for Introscopy, Research Production Amalgamation "Spectr", for monitoring the dose and its intensity in the manufacturing and exploitation of general-purpose and specialized X-ray units. A flat-parallel ionizing chamber is used in the device as a radiation detector. The related technical characteristics are contained in the paper.

Diagnostic Services↗
PubMedDate not supplied

[Determination of the efficiency of registration of X-ray diagnostic systems by visually detected minimal radiation contrast].

Described in the paper is a relatively simple method for the determination of the efficiency of registration of X-ray diagnostic systems by the whole tract of transformation of radiation contrast from the spot of contrast-sensitivity test to the visual registration of image. It is just enough to have the contrast sensitivity test and to measure the dose at test location. On the basis of the visually registered minimal contrast the efficiency of registration of a diagnostic system is evaluated by the radiation-contrast parameter. The suggested method can be used at handover tests and in testing the X-ray systems during their exploitation.

Absorptiometry, Photon↗
PubMedDate not supplied

[Determination of total filtration and half attenuation layer in X-ray diagnostic units by relative radiation output].

Described is a relatively simple technique applicable to estimating the independent and additional filtration of X-ray images by the relative radiation output with a voltage generation range of 50 to 120 kB. It is shown as possible to determine the half-attenuation first layer in its aluminum equivalent and without using any aluminum filters. The suggested technique can be used in turn-over and regular tests of medical X-ray units as well as in their exploitation.

Filtration↗
PubMedDate not supplied

[Development of systems for digital fluorography and roentgenography on the basis of x-ray image intensifiers (XRII)].

A comparative review of characteristics of digital detectors for fluorography and roentgenography. Modern digital detection systems on the basis of X-ray image intensifiers (XRII) were demonstrated to be superior in terms of both X-ray image parameters and radiation safety of patient. Specifications of a new detection system for fluorography and roentgenography available from SpektrAP Ltd. (Russia) were described.

Radiographic Image Enhancement↗
PubMedDate not supplied

[Ionization chambers with preamplifiers for X-ray exposure metering systems].

Ionization chambers with preamplifiers available from SpektrAp, Ltd., are described. The ionization chambers are intended for use in X-ray automatic exposure systems of diagnostic X-ray apparatuses. The ionization chambers provide automated matching of their sensitivity to the sensitivity of modern intensifying screens. The preamplifier provides direct integration of the ionization chamber current. It can operate within the entire dose rate range of the roentgenographic mode and meets the requirements of modern diagnostic X-ray detectors to the dose range. Special techniques for increasing the noise immunity of preamplifiers are described. Performance specifications of the ionization chambers and preamplifiers are given.

Air Ionization↗