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| Format: | Artículo científico |
| Language: | en |
| Published: |
Sociedade Brasileira de Proteção Radiológica - SBPR
2021
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| Online Access: | https://www.redalyc.org/articulo.oa?id=722280947006 |
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Table of Contents:
- Estimation of Absorbed Dose in Head CT scans Based on mA and mAs Modulation and Volumetric Air Kerma Index (CVOL) in Petrolina/PE, Brazil Jamerson Silva de Albuquerque Júnior Ebert dos Santos Silva Rodrigo Pereira Ramos Raquel Aline Pessoa Oliveira Biología absorbed dose Head tomography relevant structures radiological parameters Computed tomography (CT) represents a large percentage of radiation dose at medical exposures. Therefore, optimizing patient protection has been a practice with an important discussion. This study aims to estimate the absorbed dose in relevant organs and tissues in head CT scans in adult patients based on automatic modulation of the tube current (mA) and current-time product (mAs), and volumetric air kerma index (CVOL). For that, these parameters were collected during three bimesters in two institutions with ample attendance in Petrolina/PE. One from the private sector, named institution A and another from the public sector, named institution B. Dose evaluation was performed through CALDose_XCT simulation software. The results showed that mean values of mA and mAs per bimester were lower at Institution A, where the automatic exposure control (AEC) was activated, following the guidelines of good practice in CT scans. The CVOL presented mean values within the recommended levels, although at Institution B this parameter has presented greater magnitude. In simulations, institution B presented higher absorbed doses in the relevant structures, corroborating with the lower optimization of mA, mAs and CVOL. This work showed the existence of the link between radiological parameters and the dose absorbed in the patient, suggesting the accomplishment of optimization studies in head CT exams. 2021 artículo científico 2319-0612 https://www.redalyc.org/articulo.oa?id=722280947006 en http://www.redalyc.org/revista.oa?id=7222 Brazilian Journal of Radiation Sciences application/pdf Sociedade Brasileira de Proteção Radiológica - SBPR Brazilian Journal of Radiation Sciences (Brasil) Num.2 Vol.9