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
