X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Reexamination Certificate
2005-12-13
2005-12-13
Bruce, David V (Department: 2882)
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
C378S018000, C378S022000
Reexamination Certificate
active
06975697
ABSTRACT:
An apparatus and method for establishing a correction characteristic curve for a reduction of artefacts in a tomography are described. Projection data of the object is provided, wherein the projection data comprises transmission values for the object. A representation of the object is calculated from the projection data to obtain two or three-dimensional representation data for the object. A measure for the transmission length of the object is determined by using the representation data. A transmission value, which is associated to the determined measure for the transmission length, is determined and the correction characteristic curve of several determined measures is generated for transmission lengths and associated transmission values, wherein a precorrection of the projection data can be performed by using the determined correction characteristic curve, to iteratively determine the correction characteristic curve by using the precorrected transmission values.
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Bauscher Ingo
Hassler Ulf
Kasperl Stefan
Schroepfer Stefan
Bruce David V
Fraunhofer-Gesellschaft zur Foerdering der Angewandten Forschung
Glenn Michael A.
Glenn Patent Group
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