Abstract #1305

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

Stanislav Motyka¹, Philipp Moser^1,2, Bernhard Strasser³, Lukas Hingerl¹, Michal Považan^4,5, Gilbert Hangel¹, Eva Heckova¹, Stephan Gruber¹, Siegfried Trattnig^1,2, 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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