フラットパネルディテクタシステムの物理的画像特性  [in Japanese] Physical Imaging Properties of a Flat Panel X-ray Detector System  [in Japanese]

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Author(s)

    • 吉田 彰 YOSHIDA Akira
    • 広島県立保健福祉大学放射線学科 Department of Radiological Sciences, Faculty of Health Sciences, Hiroshima Prefectural College of Health Sciences
    • 中村 悟 NAKAMURA Satoru
    • 広島県立保健福祉大学放射線学科 Department of Radiological Sciences, Faculty of Health Sciences, Hiroshima Prefectural College of Health Sciences

Abstract

We report the physical imaging properties of a flat panel detector(FPD) designed for radiographic imaging applications(Revolution XQ/i digital chest imaging system, G. E. Medical Systems). The imaging properties of the detector were evaluated through measurements of the characteristic curve, modulation transfer function(MTF), and Wiener spectrum.<BR>The digital characteristic curves of the FPD system were measured for the two tube voltages(80kV and 120kV). They showed that the correlation between the pixel values of FPD and the incident exposure to the FPD was a linear correlation. The dynamic range of characteristic curves had a range from about 0.003 to 2 μ C/kg at the exposure. The presampling MTFs for different tube voltage were almost the same, when we measured the MTFs at 80kV and 120kV. And also, there was no significant difference between the MTFs measured with the slit in the direction parallel to the horizontal direction and with the slit in the perpendicular direction. The relative resolution of the FPD system was a 46% higher than that of ST V imaging plate of FCR(Fuji Computed Radiography) system at 2 cycles/mm. The digital Wiener spectrum of the FPD system was about 1/10 lower than that of the CR system. Thus the FPD system can provide superior imaging performance due to both high resolution and low noise.

Journal

  • Japanese Journal of Medical Physics

    Japanese Journal of Medical Physics 22(4), 246-254, 2002-12-31

    Japan Society of Medical Physics

References:  19

Codes

  • NII Article ID (NAID)
    10010661108
  • NII NACSIS-CAT ID (NCID)
    AA11580542
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    13455354
  • NDL Article ID
    6509546
  • NDL Source Classification
    ZS45(科学技術--医学--放射線医学)
  • NDL Call No.
    Z19-1395
  • Data Source
    CJP  NDL  J-STAGE 
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