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KMID : 0357520080310020171
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Journal of Radiological Science and Technology
2008 Volume.31 No. 2 p.171 ~ p.175
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Assessment of the Eye Lens Dose Reduction by Bismuth Shields in Rando Phantom Undergoing CT of the Head
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Cho Pyong-kon
Kim Yoo-Hyun
Choi Jong-Hak
Lee Ki-Sung
Lee Won-Ho
Kim You-Hyun
Choi In-Ja
Chung Jung-Pyo
Chang Sang-Gyu
Lee Hyun
Kim Jang-Seob
Choi Jong-Hak
Lee Ki-Sung
Lee Won-Ho
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Abstract
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The aim of this study is to assess the dose reduction of eye lens and availability of bismuth garments resulting from the use of radioprotective bismuth garments to shield the eyes of patients undergoing head CT. Rando phantom and TLDs were used to determine the amount of dose reduction by bismuth shielding of the eye in the following simulated CT scans : (a) scanning of the head including orbits, (b) scanning of the whole head, and (c) angled scanning of the head excluding orbits. The average dose reduction of eye lens was 43.2%, 36.0% and 1.4% for the three CT scans listed above. Significant reduction in the eye lens dose was achieved by using superficial orbital bismuth shielding during head CT scans. However, bismuth shields should not be used for the patients when their eyes are excluded from the primarily exposed region.
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KEYWORD
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Eye lens dose, CT, bismuth shielding
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Listed journal information
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