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Abstract #4005

Eliminating chemical shift artefact using simultaneous, separate water and fat excitation combined with CAIPIRINHA

Beáta Bachratá1,2, Bernhard Strasser1,3, Albrecht Ingo Schmid4, Wolfgang Bogner1, Siegfried Trattnig1,2, and Simon Daniel Robinson1

1Department of Biomedical Imaging and Image-Guided Therapy, High Field MR Centre, Medical University of Vienna, Vienna, Austria, 2Christian Doppler Laboratory for Clinical Molecular MR Imaging, Vienna, Austria, 3Department of Radiology, Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States, 4Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria

Imaging of many body regions is adversely affected by the chemical shift between fat and water. We propose a new method for simultaneous, separate imaging of fat and water in which multiband pulses are used to simultaneously excite fat and water at their characteristic resonance frequencies, and CAIPIRINHA in combination with parallel imaging to reconstruct separate images of the two species. The fat image is corrected for chemical shift displacement and either recombined with the water image or evaluated separately. The proposed method achieves reliable water-fat separation and complete elimination of the chemical shift artefact in musculo-skeletal and breast imaging.

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