書誌事項
- タイトル別名
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- Effect of Ambient Light Variations on Luminance Ratio of CRT Monitor and Image Contrast in Ultrasonography
- 臨床技術 環境照度の違いがCRTモニタの輝度比と超音波画像のコントラストに与える影響
- リンショウ ギジュツ カンキョウ ショウド ノ チガイ ガ CRT モニタ ノ キドヒ ト チョウオンパ ガゾウ ノ コントラスト ニ アタエル エイキョウ
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説明
Variation in the luminance ratio of a cathode ray tube(CRT)monitor and the ultrasonographic images at different levels of ambient light(0–150 lux)was investigated to obtain optimum ambient light in the ultrasonography suite. The maximum and minimum luminances of test patterns and ultrasonographic images were measured after three technicians independently optimized the brightness and contrast of the CRT monitor and ultrasonographic images at different levels of ambient light. Furthermore, the luminance ratio was calculated from the maximum luminance divided by the minimum luminance. When ambient light increased, it was difficult for the technicians to optimize the brightness and contrast settings of the CRT monitor to maintain a high luminance ratio at 0 lux. The luminance ratio decreased rapidly as ambient light increased up to 20 lux. However, the luminance ratio decreased gradually when ambient light was higher than 20 lux. It is necessary to take into consideration the ambient light to maintain a high luminance ratio of ultrasonographic images.
収録刊行物
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- 日本放射線技術学会雑誌
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日本放射線技術学会雑誌 65 (11), 1512-1518, 2009
公益社団法人 日本放射線技術学会
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詳細情報 詳細情報について
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- CRID
- 1390282681339136512
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- NII論文ID
- 10025977794
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- NII書誌ID
- AN00197784
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- ISSN
- 18814883
- 03694305
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- NDL書誌ID
- 10507094
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- PubMed
- 20019431
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- データソース種別
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- JaLC
- NDLサーチ
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- 抄録ライセンスフラグ
- 使用不可