Abstract
To determine whether using lower-tube voltage reduces the scattered dose for the lens during paediatric thoracic computed tomography (CT). Two paediatric anthropomorphic phantoms (ATOM Phantom, CIRS, Norfolk, Virginia, USA) representing a newborn and 5-year-old were placed on the gantry of CT scanner, and optically stimulated luminescence dosemeters were placed on the left and right lenses, in front of the left and right thyroid glands, in front of the left and right mammary glands, and in front of and behind the mammary gland level and we measured scattered dose of the optically stimulated luminescence dosemeter was compared for each phantom between 80 and 120kVp. Significant differences were observed in the scatter doses for the lens between 80 and 120kVp (p<0.01). Compared with the 120kVp scan, the scatter doses for the lens were ~15-40% lower in newborn and 5-year-olds using the 80kVp scan during paediatric CT.
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