Patent ID: 8030922

Claim:
A method for correcting B0 field drift in a temperature map generated by magnetic resonance tomography, comprising the steps of: generating a plurality of body temperature distribution representations, each of the same region of an examination subject by magnetic resonance tomography using a magnetic resonance tomography data acquisition unit having a B0 field that is subject to B0 field drift, each of said body temperature distribution representations being comprised of a plurality of pixels, and said body temperature distribution representations being selected from the group consisting of magnetic resonance phase images and temperature maps respectively derived from magnetic resonance phase images; for each pixel in each of said body temperature distribution representations, automatically electronically calculating a fluctuation measurement; for pixels in corresponding positions in respective body temperature distribution representations in said plurality of body temperature distribution representations, automatically identifying pixels exhibiting a low fluctuation that is characteristic of resulting from said B0 field drift; using only said pixels exhibiting said low fluctuation, generating a body temperature distribution reference representation, selected from the group consisting of a reference phase image and a reference temperature map; and correcting at least one of said body temperature distribution representations, or a subsequently-acquired body temperature distribution representation, as a body temperature distribution representation to be corrected, by calibrating respective pixels in said body temperature distribution representation to be corrected with respective pixels corresponding in position in said body temperature distribution reference representation.