著者

森下 雄太 宮地 利明 上田 丞政 清水 満 濱口 隆史 藤原 康博 林 弘之

出版者

日本放射線技術学会 = Japanese Society of Radiological Technology

雑誌

日本放射線技術學會雜誌 = RADIOLOGICAL TECHNOLOGY (ISSN:03694305)

巻号頁・発行日

vol.64, no.5, pp.587-590, 2008-05-20

参考文献数

13

被引用文献数

2

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The purpose of our study was to assess the mechanical effect on tattoo seals and eye makeup caused by a spatial magnetic gradient in the magnetic resonance imaging (MRI) system. Seven kinds of tattoo seals and three kinds of eye makeup, i.e., mascara, eye shadow, and eyeliner were used. On a 3.0-Tesla MRI, we determined these deflection angles according to a method established by the American Society for Testing and Materials (ASTM) at the position that produced the greatest magnetically induced deflection. Eighty-five percent of the tattoo seals showed deflection angles greater than 45 degrees of the ASTM guidelines, and the mascara and eye shadow showed over 40 degrees. This was because these contained ferromagnetic pigments such as an iron oxide, but those translational forces were very small owing to slight mass. However, it is desirable that these should be removed before MRI examination to prevent secondary problems.

著者

森下 雄太 宮地 利明 上田 丞政 清水 満 濱口 隆史 藤原 康博 林 弘之

出版者

公益社団法人 日本放射線技術学会

雑誌

日本放射線技術学会雑誌 (ISSN:03694305)

巻号頁・発行日

vol.64, no.5, pp.587-590, 2008-05-20 (Released:2008-05-29)

参考文献数

13

被引用文献数

1 2

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The purpose of our study was to assess the mechanical effect on tattoo seals and eye makeup caused by a spatial magnetic gradient in the magnetic resonance imaging (MRI) system. Seven kinds of tattoo seals and three kinds of eye makeup, i.e., mascara, eye shadow, and eyeliner were used. On a 3.0-Tesla MRI, we determined these deflection angles according to a method established by the American Society for Testing and Materials (ASTM) at the position that produced the greatest magnetically induced deflection. Eighty-five percent of the tattoo seals showed deflection angles greater than 45 degrees of the ASTM guidelines, and the mascara and eye shadow showed over 40 degrees. This was because these contained ferromagnetic pigments such as an iron oxide, but those translational forces were very small owing to slight mass. However, it is desirable that these should be removed before MRI examination to prevent secondary problems.

著者

岡林 弘之 中込 みよ子 鈴木 間左支 渡辺 征紀 本郷 昭三

出版者

日本保健物理学会

雑誌

保健物理 (ISSN:03676110)

巻号頁・発行日

vol.8, no.2, pp.73-78, 1973 (Released:2010-02-25)

参考文献数

9

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Distribution in the body and excretion pattern of uranium have been investigated, following the inhalation of uranyl nitrate aerosols (concentration of uranium were 4.2μg/l and 26.4μg/l respectively) by adult rats. Amounts of uranium in the lung and the kidney immediately after the inhalation of the aerosol were about ten to several tens times greater than those in other organs, but decreased to the level of back ground after about one month. Following the single inhalation of the aerosol, the levels of uranium in liver, spleen, blood and bones were almost in back ground level during the period of one month thereafter.However, as the amout of uranium in the liver almost coincided with that of the spleen, it is estimated that the dose delivered to the spleen is more than ten times than that of the liver, in comparison of the both weights. The excretion of uranium in urine increases, according to the inhalation of uranyl nitrate. Therefore, uranium in urine is considered as a good index of the body burden of uranium for the estimation in case of the inhalation of the uranyl compound.

著者

岡林 弘之

出版者

一般社団法人 日本原子力学会

雑誌

日本原子力学会誌 (ISSN:00047120)

巻号頁・発行日

vol.25, no.10, pp.776-782, 1983-10-30 (Released:2010-01-08)

参考文献数

53