コンピューテッドラジオグラフィの特性曲線の測定(II)
書誌事項
- タイトル別名
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- Measurements of Characteristic Curves in a Computed Radiographic System (II)
説明
We measured the “digital” characteristic curve, which relates the pixel value to the relative x-ray exposure, in a Fuji computed radiographic system (FCR-101). The time-scale sensitometric technique was applied to the sensitometry in the digital system due to the absence of the reciprocity-law-failure effect. The calibration curve showing the relationship between the relative x-ray exposure and the selected time in the x-ray generator was measured with a fluorescence meter and was used for determination of the relative x-ray exposure. It was found at two facilities that the digital characteristic curve obtained by the time-scale method was in good agreement with that obtained by inverse-square method. Moreover, the curves measured with different imaging parameter settings of the FCR system were comparable at two facilities. It was shown, at extremely larger value settings of imaging parameters, that the curve shape was nonlinear at higher and/or lower pixel values due mainly to the property of the electronic component such as photomultiplier. The use of the time-scale technique in the characteristic curve determination makes the measurements easier and shorter
収録刊行物
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- Medical Imaging and Information Sciences
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Medical Imaging and Information Sciences 6 (1), 25-38, 1989
Medical Imaging and Information Sciences
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詳細情報 詳細情報について
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- CRID
- 1390001205455432960
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- NII論文ID
- 130004647702
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- ISSN
- 09101543
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
