The use of CT scans, which possess optimal advantages for diagnosing diseases in the human body, has been
increasing annually, serving as a source of increasing patient radiation doses. This study sought to provide
foundational data useful for designing radiation shielding walls in CT examination rooms by measuring and
analyzing radiation doses for the derivation of use factors in MDCT and Mobile CT examination rooms. The
average cumulative radiation dose measured over three months using a glass dosimeter immediately before
penetrating the patient viewing window in the MDCT examination room was 100.9 ± 2.93 mSv; with 107.7 ±
5.03 mSv in the ceiling direction, 105.6 ± 4.13 mSv in the wall direction, and 114.2 ± 3.78 mSv in the floor direction.
In the Mobile CT examination room, the values were 0.35 ± 0.03 mSv; with 0.51 ± 0.02 mSv in the ceiling
direction, 0.52 ± 0.02 mSv in the wall direction, and 0.55 ± 0.03 in the floor direction. Evaluations of image
quality from different CT devices showed very satisfactory results in contrast, clarity of boundaries, and lesion
detection rates. In terms of image satisfaction against exposure dose, Mobile CT showed more satisfactory
results than MDCT. The results of this study are expected to provide information for a more secure and efficient
system in medical radiation safety management.