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Related Experiment Videos

A xenon ionization detector for digital radiography

D J Drost, A Fenster

    Medical Physics
    |March 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new xenon gas x-ray detector array for digital radiography. Despite some image degradation from crosstalk, the detector shows feasibility for this application.

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    Area of Science:

    • Medical Imaging
    • Detector Physics

    Background:

    • Xenon gas x-ray detectors are established in CT scanners.
    • Existing xenon detectors are unsuitable for digital radiography.

    Purpose of the Study:

    • To design and test a novel xenon x-ray detector array for digital radiography.
    • To evaluate the performance and feasibility of the new detector design.

    Main Methods:

    • Constructed a xenon gas detector with parallel plates (0.5-mm gap) at 30 atm.
    • Utilized a circuit board with etched collector strips, omitting metal septa for high dose efficiency.
    • Measured cross-talk, modulation transfer function (MTF), signal response, nonlinearity, and charge collection time.

    Main Results:

    • High dose efficiency due to the absence of separating septa.

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  • An 18% contrast reduction was observed due to cross-talk.
  • Measured MTF of 14% at 2 lp/mm, signal of 10 pC/mR, 6% nonlinearity, and 0.1 ms charge collection time.

    • Conclusions:

    • The new xenon detector design demonstrates feasibility for digital radiography applications.
    • Performance metrics indicate potential for clinical use, with cross-talk being a key consideration.