Evaluation of occupational radiation exposure and influencing factors for healthcare workers during diagnostic computed tomography imaging.

This study aimed to identify factors that increase radiation dose to computed tomography (CT) imaging assistants and to propose measures to minimize their effective dose, thereby improving radiation safety. Nine healthcare professionals (five intensivists and four radiological technologists) had their Hp(10) measured during 112 diagnostic CT procedures involving tasks categorized by proximity to the gantry: gantry proximal (e.g. bag-valve-mask (BVM) ventilation) and gantry distal (e.g. patient observation). Multiple regression analysis identified dose-length product (DLP) and tube current as significant predictors of effective dose of CT imaging assistants. The highest effective dose, 26 μSv, occurred during gantry proximal tasks. Intensivists received higher effective doses (35 μSv) than radiological technologists (19 μSv) because the CT imaging procedures they assisted with had higher DLP values. To reduce the effective dose, it is recommended to implement low-dose imaging protocols, optimize imaging coverage, and use radiation protection clothing, such as lead aprons, which significantly reduce Hp(10).