アモルファスシリコンを検出器に用いたフルディジタルマンモグラフィシステム : 基礎的画像特性と信号検出  [in Japanese] Full-field Digital Mammography with Amorphous Silicon-based Flat-panel Detector : Physical Imaging Characteristics and Signal Detection  [in Japanese]

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Author(s)

    • 井手口 忠光 IDEGUCHI TADAMITSU
    • 国立病院九州医療センター放射線部(臨床研究部) Department of Radiology, Clinical Research Institute, National Kyushu Medical Center
    • 豊福 不可依 TOYOFUKU FUKAI
    • 九州大学医学部保健学科 Department of Radiological Sciences, School of Health Sciences, Faculty of Medicine, Kyushu University
    • 大喜 雅文 OHKI MASAFUMI
    • 九州大学医学部保健学科 Department of Radiological Sciences, School of Health Sciences, Faculty of Medicine, Kyushu University
    • 中村 悟 NAKAMURA SATORU
    • 広島県立保健福祉大学放射線学科 Department of Radiological Sciences, Hiroshima Prefectural College of Health Sciences
    • 吉田 彰 YOSHIDA AKIRA
    • 広島県立保健福祉大学放射線学科 Department of Radiological Sciences, Hiroshima Prefectural College of Health Sciences
    • 高木 理恵 TAKAGI RIE
    • 済生会熊本病院検診センター放射線科 Department of Radiology, Saiseikai Kumamoto Hospital Medical Examination Center
    • 畑農 博英 HATANO HIROHIDE
    • 済生会熊本病院検診センター放射線科 Department of Radiology, Saiseikai Kumamoto Hospital Medical Examination Center
    • 桑原 理依 KUWAHARA RIE
    • 済生会熊本病院検診センター放射線科 Department of Radiology, Saiseikai Kumamoto Hospital Medical Examination Center

Abstract

The physical characteristics of a clinical amorphous silicon-based flat-panel imager for full-field digital mammography were investigated. Pre-sampled modulation transfer functions (MTF) were measured by using a slit method. Noise power spectra were determined for different input exposures by fast Fourier transform. The MTFs of fullfield digital mammography systems showed significantly higher values than those of the computed radiography (CR) system. The full-field digital mammography system showed a lower noise level than that of the CR system under the same exposure conditions. Contrast detail analysis has been performed to compare the detectability of the full-field digital mammography system with that of the screen-film (Min-R 2000/Min-R 2000) system. The average contrast-detail curves of digital and film images were obtained from the results of observation. Image quality figures (IQF) were also calculated from the individual observer performance tests. The results indicated that the digital contrast-detail curves and IQF, on average, are superior to those of the screen-film system.

Journal

  • Japanese Journal of Radiological Technology

    Japanese Journal of Radiological Technology 60(3), 399-405, 2004

    Japanese Society of Radiological Technology

References:  19

Cited by:  9

Codes

  • NII Article ID (NAID)
    110003434568
  • NII NACSIS-CAT ID (NCID)
    AN00197784
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    0369-4305
  • Data Source
    CJP  CJPref  NII-ELS  J-STAGE 
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