| 摘要 |
A method and apparatus for image reconstruction in an imaging system having an x-ray source, an x-ray detector module having a plurality of detector channels, a data acquisition system coupled to the detector module, and a scanning axis z, in which a scan of an object is performed to obtain data, and a smoothing filter is applied to the data, wherein the smoothing applied to the data varies as a function of position. To compensate for increased noise near the edge of a field of view, for example, a z-smoothing filter applies an increased amount of smoothing to the data as a distance from an isochannel increases. A channel dependent primary speed/afterglow correction can also be used to provide smoothing.
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