Évaluation comparative des Doses d’Entrées de Surface pour les radiographies du thorax et du rachis lombaire dans trois services de radiologie de Yaounde, Cameroun
DOI:
https://doi.org/10.55715/jaim.v12i3.110Keywords:
Chest X-ray, lumbar spine X-ray, Entrance Surface Dose (ESD), Diagnostic Reference Level (DRL).Abstract
Objectives: The aim of this study was to evaluate the Entrance Surface Dose (ESD) in patients undergoing two routine most frequent diagnostic radiographic procedures (frontal Chest X-ray (CXR), frontal and lateral views of the lumbar spine X-rays (LSXR)) in three radiology units
Material and Methods: The ESD was determined by calculation using the Davis formula. The 3rd quartile of ESD were selected as Local Diagnostic Reference Level (LDRL) and compared to existing data for each specific examination.
Results: The result reveal LDRL ranging between 0.09 - 0.34 mGy, 2.8 – 7.79 mGy and 6.9 – 13.39 mGy respectively for frontal CXR, frontal LSXR and lateral LSXR. Important variability of the exposure parameters within and between radiologic units was noted. The LDRL in this study were lower than international recommendations for frontal CXR and frontal LSXR
Conclusion: The wide variability of exposure parameters highlights the contribution of radiographer in patient dose management. This study brings out the need of establishing national DRLs, heightening awareness of radiographers on the optimization of patient’s doses during routine procedures
RÉSUMÉ
Objectifs : Le but de cette étude était d'évaluer la dose d’entrées de surface (DES) chez les patients subissant deux procédures radiographiques diagnostiques de routine les plus fréquentes : radiographie thoracique incidence de face, radiographie du rachis lombaire incidence de face et de profil dans trois services de radiologie
Matériel et méthodes : La DES était déterminée par calcul en utilisant la formule de Davis. Le 75e percentile de la DES était considéré comme Niveau de Reference Diagnostic Local (NRDL) et comparé aux données existantes
Résultats : Cette étude révèle des NRDL compris entre 0,09 - 0,34 mGy, 2,8 - 7,79 mGy et 6,9 - 13,39 mGy respectivement pour les radiographies du thorax, du rachis lombaire de face et de profil. Nous avons noté une importante variabilité des paramètres d'exposition pour les mêmes examens au sein et entre les unités radiologiques. Les NRDL dans cette étude étaient inférieurs aux recommandations internationales pour les radiographies du thorax et du rachis lombaire de face
Conclusions : La grande variabilité des paramètres d'exposition met en évidence la contribution des techniciens de radiographies à la gestion des doses de radiations administrées aux patients. Cette étude ressort la nécessité d’établir des NRD nationaux et de sensibiliser les radiologues et techniciens de radiographie à l’optimisation des doses aux patients lors des procédures de routine
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