Type:
Educational Exhibit
Keywords:
Radioprotection / Radiation dose, Experimental, Radiation safety, Quality assurance
Authors:
S. Suzuki1, T. Nakamura2, I. Kobayashi3, Y. Takei4, H. Anno5, S. Kamiya6, K. Kato7; 1Nagoya, Aichi/JP, 2Nagoya/JP, 3Tsukuba, Ibaraki/JP, 4Kurashiki/JP, 5Toyoake/JP, 6Nagoya,Aichi/JP, 7Kanagawa/JP
DOI:
10.26044/ecr2019/C-0121
Background
Operator exposure to radiation while working in the radiology room must be managed,
so it is important to determine the scattering distribution [1][2][3].
However,
operator exposure to the measurement device cannot be completely avoided.
To mitigate this problem,
we proposed a novel JG method herein.
The JG method can be used to easily obtain 3-dimensional scattered radiation distributions,
and we show the usefulness of measuring the distribution with various tests.
An individual dosimeter capable of low-dose measurement with negligible directional dependence was used for measuring the radiation scattering.
The energy of the dosimeter element was calibrated for each imaging technique for measurement of the respective radiation distribution and evaluated in kerma [4][5][6].
The paper pipes arranged in space consisted of materials that exhibit very low scattering and absorbance.
The results showed that the differences in scattered radiation caused by the various test procedures could be understood by visually evaluating the measured scattered radiation [7].
From these results,
differences due to the position and height of the operator can be easily understood and used for managing radiation safety (Fig.2).
As an example,
installing protective instruments on a fluoroscopic device reduced the scattered radiation to a negligible level,
and narrowing the radiation field greatly reduced the scattered radiation.