We measured the contrast-to-noise ratio (CNR) and evaluated low-contrast images and streak artifacts to optimize abdominal C-arm CT imaging, and we investigated the view number, acquisition matrix, and pixel depth. To measure CNR, we filled 0.125–1.0-inch cavities in an American Association of Physicists in Medicine (AAPM) CT performance phantom with a sodium chloride solution. Five radiological technologists visually evaluated the noise, signal conspicuity at low-and high-signal density, and the overall image quality using paired comparisons based on Thurstone’s law. In a given acquisition matrix, the total view number had the greatest effect on the image noise, artifacts, and signal detectability on C-arm CT images. For a given incident dose per view on the flat-panel detector (FPD), fewer images with noise and streak artifacts resulted when a larger view number was selected.
雑誌名
日本放射線技術学会雑誌
巻
65
号
6
ページ
765 - 772
発行年
2009-07-14
書誌レコードID
AN00197784
権利
(c) 2009 Japanese Society of Radiological Technology
情報源(ISSN)
03694305
フォーマット
application/pdf
形態
1898899 bytes
著者版フラグ
publisher
日本十進分類法
492.4
その他の言語のタイトル
Combinations of Scan Parameters and Image Quality at C-arm CT for Abdominal Imaging
腹部領域のC-arm CTにおけるスキャンパラメータと画質
65_765.pdf
(1.9MB)
