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A variable resolution x-ray detector for computed tomography: II. Imaging theory and performance.

F A DiBianca·P Zou·L M Jordan·J S Laughter·H D Zeman·J Sebes
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Abstract

A computed tomography (CT) imaging technique called variable resolution x-ray (VRX) detection provides variable image resolution ranging from that of clinical body scanning (1 cy/mm) to that of microscopy (100 cy/mm). In this paper, an experimental VRX CT scanner based on a rotating subject table and an angulated storage phosphor screen detector is described and tested. The measured projection resolution of the scanner is > or = 20 lp/mm. Using this scanner, 4.8-s CT scans are made of specimens of human extremities and of in vivo hamsters. In addition, the system's projected spatial resolution is calculated to exceed 100 cy/mm for a future on-line CT scanner incorporating smaller focal spots (0.1 mm) than those currently used and a 1008-channel VRX detector with 0.6-mm cell spacing.

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AlgorithmsAnimalsArmCricetinaeEquipment DesignFingersHeadHumansModels, StatisticalRadiography, ThoracicTomography, X-Ray ComputedX-Ray DiffractionComparative StudyJournal Article

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F A DiBianca, P Zou, L M Jordan, J S Laughter, H D Zeman, J Sebes. 2000. A variable resolution x-ray detector for computed tomography: II. Imaging theory and performance.. https://doi.org/10.1118/1.1285831

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