著者

坂本 肇 中村 修 弓削 誠 佐野 芳知 秋山 三郎 荒木 力

出版者

公益社団法人日本放射線技術学会

雑誌

日本放射線技術學會雜誌 (ISSN:03694305)

巻号頁・発行日

vol.56, no.10, pp.1256-1265, 2000-10-20

被引用文献数

26

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Total skin doses of patients resulting from interventional radiological procedures have the potential to exceed the threshold doses for deterministic effects such as erythema and epilation. It is desirable to measure entrance skin dose values non-invasively, easily, and at real time. If an acceptable mathematical equation could be established, the entrance skin dose could be calculated from the measured area exposure product. We established an equation to calculate the entrance skin dose from the measured area exposure product by creating calibration factors from phantom studies. In this report, entrance skin dose was calculated by using area exposure product and our established equation, and the calculated value was compared with that of the thermoluminescent dosimetric(TLD)value in a clinical setting. Although a significant correlation was found between the calculated and measured entrance doses, the deviation was about 10% in phantom studies and 20% in the clinical setting. Using our equation, calculation of ectrance skin dose is possible from area exposure product and is useful for patient dose control in the clinical setting.

著者

坂本 肇

出版者

公益社団法人日本放射線技術学会

雑誌

計測分科会誌 (ISSN:13453238)

巻号頁・発行日

vol.11, no.1, pp.17-22, 2003-03-20

被引用文献数

1 1

著者

加藤 守 千田 浩一 盛武 敬 小口 靖弘 加賀 勇治 坂本 肇 塚本 篤子 川内 覚 松本 一真 松村 光章 大阪 肇 豊嶋 英仁

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.72, no.1, pp.73-81, 2016

被引用文献数

3

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Deterministic effects have been reported in cardiac interventional procedures. To prevent radiation skin injuries in percutaneous coronary intervention (PCI), it is necessary to measure accurate patient entrance skin dose (ESD) and maximum skin absorbed dose (MSD). We measured the MSD on 62 patients in four facilities by using the Chest-RADIREC^Ⓡ system. The correlation between MSD and fluoroscopic time, dose area product (DAP), and cumulative air kerma (AK) showed good results, with the correlation between MSD and AK being the strongest. The regression lines using MSD as an outcome value (y) and AK as predictor variables (x) was y=1.18x (R²=0.787). From the linear regression equation, MSD is estimated to be about 1.18 times that of AK in real time. The Japan diagnostic reference levels (DRLs) 2015 for IVR was established by the use of dose rates using acrylic plates (20- cm thick) at the interventional reference point. Preliminary reference levels proposed by International Atomic Energy Agency (IAEA) were provided using DAP. In this study, AK showed good correlation most of all. Hence we think that Japanese DRLs for IVR should reconsider by clinical patients' exposure dose such as AK.

著者

加藤 守 千田 浩一 盛武 敬 小口 靖弘 加賀 勇治 坂本 肇 塚本 篤子 川内 覚 松本 一真 松村 光章 大阪 肇 土佐 鉃雄

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.70, no.8, pp.814-820, 2014

被引用文献数

1

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In recent years, dose justification and optimization have been attempted in percutaneous coronary intervention (PCI); however, deterministic effects have been reported. To prevent radiation skin injuries in PCI, it is necessary to measure the patient entrance skin dose (ESD), but an accurate dose measurement method has not yet been established. In this study, we developed a dosimetry gown that can measure the ESD during PCI using multiple radiophotoluminescence dosimeters (RPLDs). The RPLDs were placed into 84 pockets that were sewn into a dosimetry gown. Patients wear the original dosimetry gown during the procedures, after which we obtain accurate ESD measurements. We believe that this method using RPLDs and a newly-designed dosimetry gown provides accurate ESD measurements during PCI. We expect this system to become a standard method for measuring ESD during PCI.