ASSESSMENT OF PERSONNEL DOSE BURDEN AND QUALITY OF OPERATIONAL PARAMETERS OF X-RAY RADIOLOGICAL EQUIPMENT OF MEDICAL ORGANIZATIONS OF THE NUR-SULTAN CITY
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Date
2020
Authors
Bakhtin, M.M.
Kashkinbaev, Ye.T.
Aumalikova, M.N.
Ibrayeva, D.S.
Sharipov, M.K.
Kazymbet, P.K.
Journal Title
Journal ISSN
Volume Title
Publisher
International conference "MODERN PERSPECTIVES FOR BIOMEDICAL SCIENCES: FROM BENCH TO BEDSIDE”; National Laboratory Astana
Abstract
Introduction: The results of the assessment of the radiation situation of the workplace, the dose burden
of medical personnel, as well as the results of monitoring the operational parameters of X-ray radiological
units of medical organizations in Nur-Sultan city are presented.
Methods: Personnel dosimetric control measured with TLD, monitoring of operational parameters of
X-ray diagnostic equipment at the Piranha dosimeter.
Results: The average annual effective dose for X-ray diagnostic department workers is 0.72mSv, for intervention
department workers it is 1.27mSv, which in permissible level. At workplaces of the Department
of Radiology and Nuclear Medicine, the dose rate of X-ray radiation varies from 0.01μSv/h to 0.04μSv/h.
At the workplaces of the personnel of the catheterization department, the X-ray dose rate varies from
0.01μSv/h to 0.91μSv/h, which does not exceed the standard value. According to the results of monitoring
operational parameters in 2radiographic and 3 fluoroscopic devices, deviations from the image quality
standard were revealed. The difference between the edges of the light and radiation fields exceeded
1.5 to 2times the permissible value. The divergence of the edges of the light and radiation fields leads to
irradiation of the undiagnosed zones of the body and neighboring internal organs. The deviation of the
perpendicularity of the beam exceeded the permissible value of 1.5°. Deviation of the perpendicularity
of the beam affects the incorrect diagnosis, as the displacement of organs. In the mammography apparatus,
the difference between the edges of the light and radiation fields exceeded the permissible value
by 3 times. During the research, traces of scratching the compression spoon were found in the images
in the mammography apparatus of a pure phantom. When monitoring the compression force of compression
of the mammography apparatus, the parameter maximum force of automatic compression
exceeded the permissible value. Values of the parameters of the anode voltage, radiation yield and dose
linearity as dose repeatability in radiographic, fluoroscopic, angiographic and mammographic devices in
permissible value.
Conclusion. The revealed deviations in the operational parameters of medical X-ray equipment indicates
the need for periodic monitoring to identify technical malfunctions, as reduce the high dose burden
for patients and medical personnel.
Description
Keywords
dose, X-ray diagnostic, Research Subject Categories::MEDICINE