A Generalized Detective Quantum Efficiency (DQE) Approach To The Analysis Of X-Ray Imaging

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Abstract
X-ray imaging utilizing broad x-ray spectra has been studied. The analysis suggests a generalized view of the concept of DQE in a way that makes the efficiency dependent on the imaging task. The conventially defined DQE is shown to be equivalent to the more general DQE task when the task is differentiatinebetween radiation levels without any differences between signal and background spectra. A formulation of the theory and some examples concerning intensifying screens are presented. For some screens the difference between imaging task dependent DQEtask and the conventional DQEN may be appreciable, larger than 30%, when imaging targets with strong energy dependence in their contrast, such as bone or iodine.© (1984) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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