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. Author manuscript; available in PMC: 2017 Jun 1.
Published in final edited form as: Neurogastroenterol Motil. 2016 Feb 3;28(6):837–848. doi: 10.1111/nmo.12780

Figure 7.

Figure 7

SOBI-EGG propagation maps at 2-second intervals from 16-channel EGG measurements for (a) two normal controls and (b) two gastroparesis patients. The normal subjects and one patient (Patient 6) show pattern variation indicative of phase reversal across the array that could correspond to a propagating slow wave, but would lead to inaccurate propagation velocity estimates. The sudden phase reversal is likely the result of decreased spatial resolution in EGG data. However, Patient 7 shows a regular propagation pattern similar to those observed in the MGG that would allow a more precise estimate of propagation velocity. It remains to be determined whether SOBI-EGG enhances the signal-to-noise ratio sufficiently to provide an accurate characterization of propagation, but these preliminary data are encouraging.