Iterative extra-focal radiation correction in the reconstruction of ct images
OwnerSteffen Kappler, Ernst-Peter Rührnschopf +2inventors
InventorsSteffen Kappler, Ernst-Peter Rührnschopf, Bernhard Scholz, Karl Stierstorfer
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Abstract
A method is disclosed for reconstruction of image data of an object under examination from measurement data, with the measurement data having been recorded during a rotating movement of a radiation source of a computed tomography system around the object under examination. The radiation source emits focal and extra-focal radiation. In at least one embodiment of the method, the image data is determined from the measurement data by use of an iterative algorithm. A variable is used in the iterative algorithm which contains a distribution of the extra-focal radiation.
Claims16
A method for determining image data of an object under examination from measurement data, the measurement data having been detected during a rotating movement of a radiation source of a computed tomography system around the object under examination, with the radiation source emitting focal and extra-focal radiation, the method comprising:
- determining the image data from the measurement data by use of at least one iterative algorithm, a variable used in the at least one iterative algorithm containing a distribution of the extra-focal radiation.
Dependencies are inferred from the claim text.