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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

Spatiotemporal SOBI-MGG maps from (a) normal control subjects and (b) gastroparesis patients in postprandial periods. Each column shows 10 maps of magnetic field activity at two-second intervals in a single subject. Isocontour lines correspond to magnetic field values reconstructed using SOBI. In healthy controls (a), the magnetic field generally progresses from the subject’s left-to-right across the sensor array, consistent with the known gastric slow wave propagation. By contrast, SOBI-MGG propagation maps from patients (b) were characterized by static or retrograde patterns. Maxima of SOBI-MGG maps were tracked to determine propagation velocities.

Spatiotemporal SOBI-MGG maps from (a) normal control subjects and (b) gastroparesis patients in postprandial periods. Each column shows 10 maps of magnetic field activity at two-second intervals in a single subject. Isocontour lines correspond to magnetic field values reconstructed using SOBI. In healthy controls (a), the magnetic field generally progresses from the subject’s left-to-right across the sensor array, consistent with the known gastric slow wave propagation. By contrast, SOBI-MGG propagation maps from patients (b) were characterized by static or retrograde patterns. Maxima of SOBI-MGG maps were tracked to determine propagation velocities.