发明名称 Fan beam CT apparatus with post-processing weighting of picture element signals
摘要 In a computerized tomographic apparatus in which a wide angled, fan-shaped distribution of radiation is rotated around a body to be radiographed and detectors are provided to produce electrical output signals indicative of radiation emergent from the body along many beam paths, the signals can be sorted into sets relating to parallel sets of beam paths distributed across a cross-sectional slice of the body. However, the beam paths to which the signals so sorted relate are non-uniformly spaced beam paths, and the invention provides means whereby a processing technique known as convolution, which is of proven usefulness in computerized tomography but which, for best accuracy, operates upon output signals relating to sets of uniformly spaced, parallel beam paths, can be applied to the signals as sorted and a post-processing error compensation is effected to restore accuracy.
申请公布号 US4138611(A) 申请公布日期 1979.02.06
申请号 US19770793390 申请日期 1977.05.03
申请人 EMI LIMITED 发明人 HOUNSFIELD, GODFREY N.
分类号 G01N23/04;A61B6/00;A61B6/03;G06Q50/00;(IPC1-7):A61B6/02 主分类号 G01N23/04
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