Fig 1. Comparison between the standard technique of averaging the spectra and OSF, computed for a typical measurement with induced artifacts (only showing OFF-spectra).

(A) The standard approach of averaging all the acquisitions. The subject movement artifacts are clearly visible in the dynamics M₁₁, M₁₅ and M₂₉. (B) The output from the OSF technique performed on the same dataset as in (A). The median spectrum is computed from the output (O₁₉ and O₂₁) and is used in the quantification. (C) The resulting averaged spectrum computed using the standard technique. (D) The resulting median spectrum using the OSF technique. It is clear that the signals in the median spectrum are more intense and that this technique provided a higher effective spectral resolution when artifacts influenced the data.