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AssigneeSiemens Aktiengesellschaft
InventorsHelmut Kropfeld, Karl Schwarz
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In a method for correcting a calibration table T(n,k) of a CT apparatus that contains calibration values, the CT apparatus having a detector system with N≧2 rows of detector elements following one another in the z-direction that include a first active row of detector elements in the z-direction and a last active row of detector elements in the z-direction, for correcting the calibration values of the aforementioned first and last active rows of detector elements, a reference vector R(k) is produced, the error is determined with respect to the first and last active rows of detector elements, and the error F(n,k) of the first and last active rows of detector elements is subtracted from the corresponding calibration values of the calibration table T(n,k) for determining corrected calibration values Tcor(n,k) with respect to the first and last active rows of detector elements.
A method for correcting a calibration table T(n,k) of a computed tomography apparatus wherein n is a row index of a detector system of the apparatus and k is a channel index of the detector system, said detector system comprising a plurality N≧2 of active rows of detector elements following one another in a z-direction that includes outer active rows comprising at least a first active row of detector elements in the z-direction and a last active row of detector elements in the z-direction, comprising the steps, for correcting the calibration values of the outer active rows of detector elements, of:
Dependencies are inferred from the claim text.