Computed tomography method utilizing a conical radiation beam

A computed tomography method comprising:

• generating, while using a radiation source, a conical radiation beam which traverses an examination zone or an object present therein,
• generating a circular relative motion, including a rotation about an axis of rotation, between the radiation source on the one side and the examination zone or the object on the other side,
• acquiring, while using a detector unit, measuring data which is dependent on the intensity in the radiation beam to the other side of the examination zone during the relative motion, and
• reconstructing the spatial distribution of the absorption within the examination zone from the acquired measuring data, wherein the step of reconstruction further comprises:
• rebinning the measuring data so as to form a number of groups, each group containing a plurality of planes which extend parallel to one another and parallel to the axis of rotation and in each of which a respective fan beam is situated,
• one-dimensional filtering of the data produced by the rebinning in each group in a direction perpendicular to the direction of the planes, and
• reconstructing the spatial distribution of the absorption by backprojection of the filtered data of a plurality of groups.