Patent ID: 8150492

Claim:
A correction method for correcting a noise resulting from a gradient artifact in an ECG signal data record recorded in a magnetic resonance device by an ECG measuring apparatus, comprising: determining a correction data record from a first signal acquired by the ECG measuring apparatus when said ECG measuring apparatus is located at a first position relative to the magnetic resonance device, wherein the correction data record is based on estimating a first impulse response at the first position of the ECG measuring apparatus; recording the ECG signal data record to be corrected from a second signal acquired by the ECG measuring apparatus when said ECG measuring apparatus is located at a second position relative to the magnetic resonance device, the second position being spaced apart from the first position; determining with a processor a modified correction data record as a function of the correction data record and the first and the second position of the ECG measuring apparatus, wherein the determining of the modified correction data record is based on estimating a second impulse response defined by a product of a) the first impulse response at the first position of the ECG measuring apparatus time and b) a quotient z ⁢ ⁢ 1 z ⁢ ⁢ 0 , wherein z 0 represents a coordinate indicative of the first position of the ECG measuring apparatus, and further wherein z 1 represents a coordinate indicative of the second position of the ECG measuring apparatus; and correcting the noise in the ECG signal data record from the second signal acquired by the ECG measuring apparatus at the second position, the correcting based on the modified correction data record without having to estimate a further impulse response at the second position.