Method for acquiring a 3D image dataset freed of traces of a metal object
AssigneeSiemens Aktiengesellschaft
InventorsChristopher Rohkohl, Bernhard Scholz
Life of this patent
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Abstract
An interpolation of data values is performed during the acquisition of a 3D image dataset which is free of traces of a metal object imaged in the underlying 2D image datasets. A target function is defined into which data values of the 3D image dataset that are dependent on said substitute data values are incorporated following preprocessing. The substitute data values are then varied iteratively until the value of the target function satisfies a predetermined criterion. Residual artifacts that still persist following the interpolation can thus be effectively reduced.
Claims8
A method for acquiring a 3D image dataset, comprising:
- acquiring a plurality of 2D image datasets with a metal object imaged in at least some of the 2D image datasets using an X-ray image recording device;
- reconstructing an initial 3D image dataset from the 2D image datasets;
- generating a preprocessed 3D image dataset from the initial 3D image datasets;
- determining a plurality of substitute data values for the preprocessed 3D image dataset during the preprocessing by interpolating data values of the 2D image datasets;
- determining a value of a target function from the preprocessed 3D image dataset that is dependent on the substitute data values;
- iteratively determining the substitute data values until the value of the target function satisfies a predetermined criterion;
- and
- reconstructing a 3D image dataset that is free of traces of the metal object once the predetermined criterion is satisfied.
Dependencies are inferred from the claim text.