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. Author manuscript; available in PMC: 2021 Aug 1.
Published in final edited form as: Med Biol Eng Comput. 2020 May 26;58(8):1651–1665. doi: 10.1007/s11517-020-02183-z

Fig. 1. Schematic of EMMI system.

Fig. 1.

Top left, a patient-specific body-uterus geometry is obtained and segmented from an MRI scan while the patient is wearing up to 256 MRI-compatible markers. Lower left, body surface potentials are recorded from up to 256 pin-type unipolar electrode patches placed in positions corresponding to the MRI-compatible markers. Middle, EMMI software combines the two data sets to reconstruct uterine surface (top right) electrograms (electrical waveforms over time at each uterine site) and (middle right) potential maps (electrical activity across the uterus at a single time point). (Lower right) Activation times can be derived from the electrograms to construct isochrone maps. EMMI software is an in-house developed MATLAB package able to solve the inverse problem.