title: High-resolution digital x-ray detector utilizing a discrete array of CdWO4 scintillators and a self-scanned photodiode array.
abstract: A high-resolution x-ray detector array for x-ray imaging is described. It consists of a discrete array of CdWO4 scintillators and a Reticon 1024S photodiode array with a fiber-optic faceplate. The scintillator elements measure 0.099 X 3 X 4 mm and are bonded together with aluminum foil separators to minimize light crossover. Detective quantum efficiency (DQE) of individual detector channels was 0.38. Systematic variations between channels were substantial. With only a simple correction for between channel variations, DQE for the entire array was 0.04. Evaluation of the edge response function of the array showed that resolution is similar to a detector whose line spread function is Gaussian with a standard deviation of 0.172 mm.
mesh_terms: D002104:Cadmium; D019187:Cadmium Compounds; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D012588:Scintillation Counting / Q000295:instrumentation; D014414:Tungsten; D017973:Tungsten Compounds
chemical_list: D019187:Cadmium Compounds; D017973:Tungsten Compounds; D002104:Cadmium; C052547:cadmium tungsten oxide; D014414:Tungsten