DOSE EVALUATION IN CHEST X-RAYS

Abstract

Objective: A study was carried out to determine whether the dose delivered to the patient during chest X-ray in two positions, posteroanterior and lateral, is in accordance with the value recommended by RDC 611/2022 (IN No. 90). Methodology: An exploratory and descriptive study was carried out based on data previously collected in an observational way in a hospital in the city of Salvador-BA. A total of 200 exposure parameters (voltage and current-time product) were collected from the 100 patients, 50 females and 50 males. These collected data were reproduced in the digital fixed X-ray equipment, belonging to the school clinic of the Federal Institute of Bahia. An X-ray measurement system with an ionization chamber and solid-state dose sensors specific for X-rays was used, which indicated the value of the skin entry dose (DEP) in software installed on a laptop. Results: It was found that the value of EPD delivered to patients is in accordance with the maximum reference value established by RDC 611/2022 (IN No. 90). The values for the current product-time (mAs) showed a great discrepancy between the positions, with an increase of 210%, while the voltage (kV) remained almost unchanged. Conclusion: It is noteworthy that although the value is below the recommended value, there is still the possibility of improvement with the implementation of a quality control and assurance program to contribute to the standardization of procedures and the use of a thickness meter for a better selection of the technical parameters used. Consolidating the application of protocols on an individual basis, taking into account the thickness of the structure to be studied to determine the technical parameters to be applied.

DOI: https://doi.org/10.56238/sevened2024.039-017