歯科用Ｘ線装置の実態調査　　線質，出力，タイマー精度について

DOI 被引用文献2件

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タイトル別名
  • A survey of dental X-ray units. Non-invasive measurements of beam quality, radiation outputs and accuracy of timer.
  • ―線質、出力、タイマー精度について―

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説明

Fourty six dental X-ray units used in dental offices and university hospitals were measured in terms of beam quality, radiation outputs and accuracy of timer using a NERO (Non-invasive Evaluator of Radiation Outputs) X-ray beam analyzer. Results were as follows, peak voltage in 87% of units ranged within 10% difference from indicated voltage and its mean was 59.0kVp. Mean half value layer and estimated mean total filtration were 1.92 and 2.0mmAl equivalent thickness, respectively. Mean exposure rate at cone end was 0.73R/s. 90% of units in dental offices showed significant difference between indicated time and actual exposure time below 0.5 sec. These results were compared with the recommendation by ICRP and JIS. Higher accuracy of timer should be required for higher sensitive recording systems.

収録刊行物

  • 歯科放射線

    歯科放射線 27 (1), 25-32, 1987

    特定非営利活動法人 日本歯科放射線学会

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