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Abstract #1305

Evaluation of different postprocessing-based B0 inhomogeneity correction methods for application in 7T FID-MRSI

Stanislav Motyka1, Philipp Moser1,2, Bernhard Strasser3, Lukas Hingerl1, Michal Pova┼żan4,5, Gilbert Hangel1, Eva Heckova1, Stephan Gruber1, Siegfried Trattnig1,2, and Wolfgang Bogner1

1High Field MR Centre, Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria, 2Christian Doppler Laboratory for Clinical Molecular MR Imaging, Vienna, Austria, 3Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States, 4Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine, Baltimore, MD, United States, 5M. Kirby Research Center for Functional Brain Imaging, Kennedy Krieger Institute, Baltimore, MD, United States

The information from B0 maps can be used to improve the spectral quality in MRSI. Two post-processing methods, SPREAD and odMRSI, were implemented and evaluated on: i) simulation model, ii) phantom data, and iii) high-resolution in vivo data acquired by 2D FID-MRSI with CAIPIRINHA acceleration at 7T. Both methods were capable to improve the spectral quality, however, the SPREAD only in high SNR situations which are not present in clinical reality. The spectral quality improvement brought by odMRSI was equivalent to the averaging of 6 averages but this improvement could not be directly translated into the same metabolic map quality.

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