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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/1506

Title: Detective quantum efficiency of medical x-ray image intensifiers
Authors: Thirlwall, JT
Keywords: X-ray image intensifiers
Detective quantum efficiency
Gadolinium oxysulphide
Applied physics
Issue Date: Nov-1998
Publisher: American Institute of Physics
Citation: Thirlwall, JT. 1998. The detective quantum efficiency of medical x-ray image intensifiers. Review of Scientific Instruments, vol. 69(11), pp 3953-3957
Abstract: The recognition of small features of low contrast in the image recorded by an x-ray image intensifier is usually limited by photon noise. This detail-contrast perceptibility is dependent on the detective quantum efficiency (DQE) and the modulation transfer function of the imaging tube and associated scanning system. The DQE can be calculated for all input photon energies from the statistical behaviour of each stage of photon detection and amplification where quanta are lost or converted. The potential improvement to be obtained from any proposed design change can be estimated. The escape of characteristic photons from the input phosphor layer causes significant change to the performance particularly when gadolinium oxysulphide is employed for that purpose.
URI: http://hdl.handle.net/10204/1506
ISSN: 0034-6748
Appears in Collections:Sensor science and technology
General science, engineering & technology

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