Thirlwall, JT2007-02-062007-06-072007-02-062007-06-071998-11Thirlwall, JT. 1998. The detective quantum efficiency of medical x-ray image intensifiers. Review of Scientific Instruments, vol. 69(11), pp 3953-39570034-6748http://hdl.handle.net/10204/1506http://hdl.handle.net/10204/1506The 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.154691 bytesapplication/pdfenCopyright: 1998 American Institute of PhysicsX-ray image intensifiersDetective quantum efficiencyDQEPhotonsGadolinium oxysulphideInstrumentationApplied physicsArticleThirlwall, J. (1998). Detective quantum efficiency of medical x-ray image intensifiers. http://hdl.handle.net/10204/1506Thirlwall, JT "Detective quantum efficiency of medical x-ray image intensifiers." (1998) http://hdl.handle.net/10204/1506Thirlwall J. Detective quantum efficiency of medical x-ray image intensifiers. 1998; http://hdl.handle.net/10204/1506.TY - Article AU - Thirlwall, JT AB - 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. DA - 1998-11 DB - ResearchSpace DP - CSIR KW - X-ray image intensifiers KW - Detective quantum efficiency KW - DQE KW - Photons KW - Gadolinium oxysulphide KW - Instrumentation KW - Applied physics LK - https://researchspace.csir.co.za PY - 1998 SM - 0034-6748 T1 - Detective quantum efficiency of medical x-ray image intensifiers TI - Detective quantum efficiency of medical x-ray image intensifiers UR - http://hdl.handle.net/10204/1506 ER -