| 摘要 |
A method for determining the modulation transfer function (MTF) of a magnetic resonance system is described. The method involves recording, by means of the relevant magnetic resonance system, a cross-sectional image of stripe structure (S, S<SUB>1</SUB>, S<SUB>2</SUB>, S<SUB>3</SUB>, S<SUB>4</SUB>, S<SUB>5</SUB>, S<SUB>6</SUB>) of a phantom ( 1 ) with a number of alternately arranged magnetic resonance device-active material layers ( 6 ) and magnetic resonance device-inactive material layers ( 7 ) with a prespecified periodicity running at right angles to the cross-sectional recording plane (BE), with the magnetic resonance device-active material layers ( 6 ) being thicker than the magnetic resonance device-inactive material layers ( 7 ). Subsequently the quotient of the standard deviation (ó) and of the mean (<|b(x)|>) of the intensity values of the pixels located in a specific Region of Interest (ROI) are determined and defined on the basis of the quotient of the modulation transfer function determined. In addition a corresponding phantom stripe structure and a device for determining the modulation transfer function are described.
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