直接型FPDの画質特性と検出特性  [in Japanese] Image Quality and Detection Performance of a Direct Digital Radiography System  [in Japanese]

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Author(s)

Abstract

The physical characteristics of a direct amorphous Selenium (a-Se) digital fluoroscopy and radiography system were investigated. Pre-sampled modulation transfer functions (MTF) were measured using a slit method. Noise power spectra were determined for different input exposures by fast Fourier transform of uniformly exposed samples. The MTFs of direct digital radiography systems showed significantly higher values than those of indirect digital radiography and screen-film systems. The direct digital radiography systems showed higher noise levels compared with those of indirect systems under roughly the same exposure conditions. Contrast-detail analysis was performed to compare detection by direct digital radiography systems with that of the screen-film (FUJI HG-M2/UR2) systems. 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 digital contrast-detail curves and IQF are, on average, are equal those of the screen-film system.

Journal

  • Japanese Journal of Radiological Technology

    Japanese Journal of Radiological Technology 62(3), 425-433, 2006-03-20

    Japanese Society of Radiological Technology (JSRT)

References:  22

Cited by:  9

Codes

  • NII Article ID (NAID)
    110004709701
  • NII NACSIS-CAT ID (NCID)
    AN00197784
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03694305
  • NDL Article ID
    7891807
  • NDL Source Classification
    ZS45(科学技術--医学--放射線医学)
  • NDL Call No.
    Z19-205
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE 
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