日本放射線技術学会雑誌
Online ISSN : 1881-4883
Print ISSN : 0369-4305
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ガラスバッジを用いた単純X線撮影における患者被ばく線量の測定
宇佐美 公男坂口 健太大塚 正和永元 啓介井上 亮福田 光道狩野 好延吉田 浩一細野 眞
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2011 年 67 巻 7 号 p. 785-792

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Radiography is used in medical practices based on the principles of justification and optimization. Patients’ exposure doses should be kept as low as still allows for image quality that does not disturb the diagnostic processes. To optimize diagnostic radiological procedures, the international commission on radiological protection (ICRP) advocated the establishment of diagnosis reference levels (DRLs) in the new basic recommendation (Publication 103) in 2007 by stating that “The DRL should be expressed as a readily measurable patient-dose-related quantity for the specified procedure.” In this context, a simple and standardized dosimetric method is needed to verify the adaptability of a radiation dose to the DRLs. As a measuring instrument that has good availability, high accuracy, and easy operability, we adopted the glass badge system, which has been used for individual exposure dose management. We evaluated the accuracy of the system as a tool of simplified dosimetry of diagnostic X-rays by comparing it to the standard dosimetry of an ionization chamber. In an energy range of 50 to 140 kV for X-ray exposure, the glass badge showed values within 7% of or closer to those measured by the standard ionization chamber. Moreover, the glass badge measurement was independent of the rectification modes of the X-ray tubes. In conclusion, glass badge measurement is feasible for verifying diagnostic X-ray doses in relation to DRLs and can be widely used in hospitals and clinics.

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© 2011 公益社団法人 日本放射線技術学会
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