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KMID : 1149020200220020045
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Journal of Korean Society of Computed Tomographic Technology
2020 Volume.22 No. 2 p.45 ~ p.51
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A study on the Spatial dose by change of Gantry angle in brain CT
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Sung Dong-Chan
Kim Young-Kyoon
Kim Eun-Hye
Hwang Byung-Jun
Ahn Mi-Seob
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Abstract
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Spatial dose is a very important indicator of the degree of exposure between patients, radiation workers, and medical personnel. However, despite the use of gantry angles in brain CT examinations, the study on the variation of spatial dose according to gantry angles was insufficient, so in this study, the spatial dose was measured by varying gantry angles by 5° from I30 to S30, and it was also measured by varying the height and distance of the ion chamber measurements.A s a result, it was possible to confirm the change in the spatial dose according to the point, the measuring distance, and the measuring height, and it was found that the spatial dose of the front part of the gantry was lower than that of the rear part from the gantry angle I30 to S20.T herefore, if the accompanying medical personnel are aware of this fact and wait at the front and rear sides of the gantry according to the gantry angle, it is believed to help reduce the unnecessary spatial dose and exposure dose that the medical personnel will receive.
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KEYWORD
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Brain CT, Spatial dose, Gantry angle
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