Purpose: During computed tomography (CT) examinations, it may be necessary to assist the patient to maintain an appropriate body position. However, there is little protective equipment available for caregivers who approach the gantry. This study aimed to evaluate the effectiveness of novel radiation protective curtains in reducing radiation exposure to caregivers while assisting patients, especially during CT examinations of the head. Method: The absorbed dose in air around the gantry during CT examinations of the head was measured using glass dosimeters. The measurement points from the center of the gantry were 40 to 120 cm in the front, 0 to 100 cm for each side in the right and left, and 60 to 180 cm from the floor. Measurements were performed at each 20-cm interval, and all points were accumulated 10 times. The absorbed dose in air in a CT room was compared with and without the protective curtains. Next, we assumed the height of the caregiver to be 170 cm, and measured the points for the crystalline lens, chest, and abdomen. Also, using the protective glasses and the protective apron, we measured the absorbed dose in air for the caregivers behind the protective curtains. Result: The absorbed exposure dose in air toward the crystalline lenses, chest, and abdomen was reduced more than 90% by using the protective curtains and more than 95% by using the protective apron and protective glasses in addition to them. Conclusion: This study showed the usefulness of protective curtains in reducing the absorbed exposure dose in air to caregivers.
"},{"@language":"ja","@value":"【目的】CT検査において，患者の監視や体動抑制等が必要な場合，検査室内で患者介助を行う医療従事者に特化した放射線防護用具を用いた研究報告は見かけない．われわれは，特に介助機会の多い頭部CT検査時における介助者被ばくの低減を目的として，放射線防護カーテン（以下，防護カーテン）を開発し，その有用性について検討した．【方法】CT装置にてランドファントムを頭部条件で撮影し，防護カーテンの有無における介助者の水晶体，胸部，腹部を想定した位置の空気吸収線量（以下，空間線量）をガラス線量計にて測定した．【結果】防護カーテンの使用により，CT室内の広域にわたる空間線量は大きく低減した．また，水晶体，胸部，腹部の位置では約90%以上の空間線量が低減し，更に，防護カーテンに防護眼鏡および防護衣を併用することにより，約95%以上の空間線量が低減した．【結語】本研究において製作した防護カーテンの有用性が示唆された．
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Technol."},{"@language":"ja","@value":"日放技学誌"}],"dc:publisher":[{"@language":"en","@value":"Japanese Society of Radiological Technology"},{"@language":"ja","@value":"公益社団法人 日本放射線技術学会"}],"prism:publicationDate":"2022-02-20","prism:volume":"78","prism:number":"2","prism:startingPage":"140","prism:endingPage":"151"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","url":[{"@id":"http://id.ndl.go.jp/bib/032015435"},{"@id":"https://ndlsearch.ndl.go.jp/books/R000000004-I032015435"},{"@id":"https://www.jstage.jst.go.jp/article/jjrt/78/2/78_780201/_pdf"},{"@id":"https://search.jamas.or.jp/link/ui/2022111536"}],"availableAt":"2022-02-20","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=computed%20tomography%20(CT)","dc:title":"computed tomography (CT)"},{"@id":"https://cir.nii.ac.jp/all?q=caregiver","dc:title":"caregiver"},{"@id":"https://cir.nii.ac.jp/all?q=radiation%20exposure","dc:title":"radiation 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