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, S.sub.2, S.sub.3, S.sub.4, S.sub.5,
S.sub.6) 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 () and of the mean
(<.vertline.b(x).vertline.>) 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.
