Radiation exposure reduction technology at the time of CT scans advances day by day, and the exposure at the time of the main scan has been greatly reduced. As exposure reduction in this main scan progresses, the ratio of exposure during scout scans is increasing.
Radiation dose reduction is quite important especially in children for their sensitivity and life expectancy. In addition, nurses and radiologists often fix their heads by hand during CT scans of children, and it is important to strive to reduce exposure during scout imaging.
One way to reduce radiation exposure is to use a tin filter. Currently, in CT scans using Somatom Drive (Siemens Healthcare), we have introduced a tin filter not only for the main scan but also for scout imaging for the purpose of reducing radiation exposure. However, the usefulness of tin filters in main scans in vivo has been widely reported, the usefulness of tin filters in scout scans has only been reported from phantom experiments.
In this study, we evaluated the radiation dose of scout imaging using a tin filter and evaluated the image quality of scout images with conventional CT.