Title :
Reduction of Circular Artefacts in Fan-Beam Scanners
Author_Institution :
Philips GmbH Forschungslaboratorium Hamburg, Postbox 54 08 40 2000 Hamburg 54, FRG
Abstract :
A non-uniform sensitivity of the detector array used in a fan-beam scanner causes circular artefacts which interfere with the picture of the object slice reconstructed from the measured projections. An additional shift of the detector array is proposed here to reduce the amplitude of the artefacts considerably.
Keywords :
Collimators; Computed tomography; Convolution; Detectors; Geometry; Image reconstruction; Object detection; Rotation measurement; Sensor arrays; X-ray detection;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1977.4329255
