Vol. 8, 2023

Radiation Protection


Luljeta Disha, Manjola Shyti

Pages: 111-115

DOI: 10.37392/RapProc.2023.23

During the last decade many European countries have applied and regulated through state legislation quality control (QC) program in diagnostic radiology. Such a program forms an essential part of dose effective radiological practice and should be implemented in every x-ray medical equipment. Implementation of QC tests on diagnostic radiographic equipment can ensure the optimal status of imaging systems, providing in this way high-quality images. QC of radiological medical devices in Albania is applicated since 2015, every three years. QC techniques used to test the components of the radiological system and verify that the equipment is operating satisfactorily are performed from the Institute of Applied Nuclear Physics and all the instruments used for performing these measurements are sponsored by the International Atomic Energy Agency. The aim of this study was to investigate the status of 8 randomly selected X-ray generators used in radiology centers of 6 different cities in Albania during the 2021-2022 period. This study presents only the primary QC parameters: kilovoltage (kVp) accuracy and reproducibility, kVp variation with change of mA, exposure time accuracy and reproducibility, tube output and reproducibility, tube output variation with change in indicated tube current - exposure time product (mAs) and filtration (half value layer). All measurements were performed using Radcal (AGMS-DM+) solid-state multi sensor, plugged into its appropriate (Accu-Gold+) digitizer module. This detector was placed on the radiographic tabletop along with the central axis of the X-ray beam at the focus to detector distance of 100 cm. Based on the findings, this study showed clearly that all the radiographic devices, subject of routine quality control tests were in a very good compliance with the acceptable criteria. Specifically, for the primary QC parameters tests, kVp accuracy was between 1.4 - 5%, kVp reproducibility was between 1-3.1%, kVp variation with change of mA was between 1.4 - 5.4 %, time accuracy and reproducibility was between 0 - 6.6%, tube output value with a total filtration 2.5 mm Al at 100 cm for true 80 kV operation was between 26.1 - 60µGy/mAs, tube output reproducibility was between 0 – 2.5%, tube output variation with change of mAs product was between 1 - 18% and filtration at 70 kV was between 2.6 – 3.9 mm Al. Results of this study showed that, even though radiological devices in Albania are relatively old with high workload, especially during the last years, all the devices met the standard criteria.
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