Projection-region reconstruction method for a helically sampling computer tomography device with a multigap detector field which uses overlapping beams

摘要

An X-ray computer tomography device for helical sampling of a patient displaces the patient, while projections of the patient are obtained at various beam angles. The projection data are weighted or evaluated before reconstruction, in order to take into account multiply measured projection data and the deviation of the conical beam from a parallel beam approximation.