金属フィルタを用いた循環器専用撮影装置における放射線被ばく低減の検討 Examination of Patient Dose Reduction in Cardiovasucular X-ray Systems with a Metal Filter

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抄録

In interventional X-ray for cardiology of flat panel digital detector (FPD), the phenomenon that exposure dose was suddenly increased when a subject thickness was thickened was recognized. At that time, variable metal built-in filters in FPD were all off. Therefore, we examined whether dose reduction was possible without affecting a clinical image using metal filter (filter) which we have been conventionally using for dose reduction. About 45% dose reduction was achieved when we measured an exposure dose at 30 cm of acrylic thickness in the presence of a filter. In addition, we measured signal to noise ratio/contrast to noise ratio/a resolution limit by the visual evaluation, and there was no influence by filter usage. In the clinical examination, visual evaluation of image quality of coronary angiography (40 cases) using a 5-point evaluation scale by a physician was performed. As a result, filter usage did not influence the image quality (p=NS). Therefore, reduction of sudden increase of exposure dose was achieved without influencing an image quality by adding filter to FPD.

収録刊行物

  • 日本放射線技術學會雜誌

    日本放射線技術學會雜誌 68(3), 247-253, 2012-03-20

    Japanese Society of Radiological Technology

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各種コード

  • NII論文ID(NAID)
    10030139277
  • NII書誌ID(NCID)
    AN00197784
  • 本文言語コード
    JPN
  • 資料種別
    NOT
  • ISSN
    03694305
  • NDL 記事登録ID
    023640030
  • NDL 請求記号
    Z19-205
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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