徳島大学 教育・研究者情報データベース(EDB)

1. 山下 一太([徳島大学.大学院医歯薬学研究部.医学域.連携研究部門(医学域).寄附講座系(医学域).地域運動器・スポーツ医学])

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2. 東野 恒作

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3. (英) Hayashi Hiroaki

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4. (英) Takegami Kazuki

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5. 林 二三男

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6. 鶴尾 吉宏([徳島大学.大学院医歯薬学研究部.医学域.医科学部門.生理系.顕微解剖学])

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7. 西良 浩一([徳島大学.大学院医歯薬学研究部.医学域.医科学部門.外科系.運動機能外科学])

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(英) Direct measurement of radiation exposure dose to individual organs during diagnostic computed tomography examination.

(日) Ionizing radiation from Computed tomography (CT) examinations and the associated health risks are growing concerns. The purpose of this study was to directly measure individual organ doses during routine clinical CT scanning protocols and to evaluate how these measurements vary with scanning conditions. Optically stimulated luminescence (OSL) dosimeters were surgically implanted into individual organs of fresh non-embalmed whole-body cadavers. Whole-body, head, chest, and abdomen CT scans were taken of 6 cadavers by simulating common clinical methods. The dosimeters were extracted and the radiation exposure doses for each organ were calculated. Average values were used for analysis. Measured individual organ doses for whole-body routine CT protocol were less than 20 mGy for all organs. The measured doses of surface/shallow organs were higher than those of deep organs under the same irradiation conditions. At the same tube voltage and tube current, all internal organ doses were significantly higher for whole-body scans compared with abdominal scans. This study could provide valuable information on individual organ doses and their trends under various scanning conditions. These data could be referenced and used when considering CT examination in daily clinical situations.

1. (英) PublicationType: Journal Article