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Abstract #2366

Phase-Rotation for Spectroscopic Motion Correction

Saadallah Ramadan1, Eva-Maria Ratai2, Ravi Seethamraju3, Carolyn E. Mountford1

1Radiology, Brigham and Women's Hospital, Boston, MA, USA; 2Athinoula A. Martinos Center for Biomedical Imaging, MGH, Boston, MA, USA; 3Siemens Medical Solutions Inc, Malvern, PA, USA

Spectral analysis depends heavily on enhanced peak resolution and narrow line widths. Increased line width due to motion can be a major source of error. Phase rotation was first developed to resolve the desired signal from undesired signal in localized spectroscopy. However, phase-rotation is also suitable for filtering out motion-effected signal in localized spectroscopy. In this work, in vivo experiments show that phase-rotation technique can be used to filter out motion-effected signal in spectroscopic examinations, to produce narrow-lined spectra. This is an improvement over phase cycling techniques that rely on data averaging in the time domain.