A method for automatically distinguish whether a pixel of a with the aid of a magnetic resonance system (1) recorded mr - image to a fat dominated or to a water is dominated tissue, comprising the steps of:– Detect only of a spin echo based magnet resonance signal (16) per image point to a point in time at which the phase of the magnetic resonance signal of the water-containing fabric of the phase of the magnetic resonance signal is in the opposite direction of the fatty tissue,– Calculating the phase angle of the pixel from the magnetic resonance signal (16),– Determining the by the magnetic resonance system (1) base phase caused to the pixel,– Determining a corrected phase angle of the pixel from the phase angle of the pixel and the base phase to the pixel and– Determining whether the pixel to be a fat dominated or to a water is dominated fabric, with the aid of the corrected phase angle of the pixel.
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