Image reconstruction method for computer tomography, by filtering output data from detector array and back-projecting to form section image of layer

摘要

The method involves scanning the object under test with a cone-shaped beam, and detecting the beam using a detector array. The focus is moved relative to the object under test along a path around the system axis. The output data are filtered in the direction of the tangent to the respective focus position. The filtered data are back-projected in three dimensions to form a sectional image of a layer.