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Abstract #1492

In-Vivo Water, Fat and Silicone Separation Using a Fast Multi-Echo TSE Acquisition

Karl-Heinz Herrmann1, Tim Sprenger2, Werner A. Kaiser3, Jrgen R. Reichenbach2

1IDIR I, Medical Physics Group, Jena University Hospital , Jena, Germany; 2IDIR I, Medical Physics Group, Jena University Hospital, Jena, Germany; 3IDIR I, Jena University Hospital, Jena, Germany

A fast multi-echo TSE sequence is proposed for Dixon based water, fat and silicone separation. The sequence acquires 5 echoes, using bipolar gradients, within each refocusing interval. To correct the phase errors introduced by the bipolar readouts, the central k-space line is acquired for each echo in two additional refocusing intervals after the imaging echo train. There the readout gradients in the second interval are inverted to provide phase calibration data. The spectral separation was performed with a region-growing stabilized VARPRO implementation. One in-vivo dataset of a patient is shown and the separation proved robust against the B0 inhomogeneities present in the patient.