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Fat-water signal cancellation. a) Diagram showing the evolution of the transverse magnetisation component for a fat spin relative to a water spin. At approximately 2.4 ms at 1.5 T (1.2 ms at 3 T), the spins are out of phase and the resulting signals subtract. b) Fat water cancellation artefact around the right ventricular wall (arrows) on a bSSFP long-axis cine. c) The same artefact around a liposarcoma in the left ventricle (arrows).
