|
KMID : 1131320140160020043
|
|
Journal of Korean Society of Computed Tomographic Technology
2014 Volume.16 No. 2 p.43 ~ p.55
|
|
|
A Study to reduce effective dose in accordance with the degree of shielding in pediatric Brain and Chest CT
|
|
Kim Eun-Kyeong
Lee Seong-Ju
Yoo Sang-Jae
Kim Dong-Seong
|
|
|
Abstract
|
|
|
Purpose : Measuring the absorbed dose organ in pediatric brain and chest CT, as calculated in effective dose, and are let investigated effective dose reduction effect according to the degree of the shield.
Materials and methods : It was inserted by two left and right in thyroid, adrenal, gonadal optically stimulated luminescence dosimeter in organ hole to use the phantom. And It was measured by separating non shield, half shield, in all around shield and measured the absorbed dose, which was converted to effective dose it.
Results : On brain CT, when it was based on a half shield, all around shield showed a reduction ratio of thyroid 16.19%, adrenal 75%, gonads 0% effective dose. And when it was based on a half shield, all around shield showed a reduction ratio of thyroid 80.3%, adrenal 28.98%, gonads 10% effective dose in chest CT.
Conclusion : On brain and chest CT, dose reduction of 35.08% has become clear that all round shield from non shield. And it showed a decrease of dose rate of 88.56% from the best all round shield. Therefore, it is useful to use all around shield is to reduce the dose in pediatric brain and chest CT.
|
|
|
KEYWORD
|
|
|
pediatric CT , 5 years pediatric phantom , OSLD , organ absorbed dose, organ effective dose
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|
|