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Bioelectric simulation visualization of a slab tissue model. This simulation shows the extracellular isosurface resulting for a bipolar stimulation in simulated tissue/blood interface. The brown sphere represents a region of reduced extracellular conductivity as might be found in the case of pathological tissue remodeling. The simulation and visualizations were produced in SCIRun, and the specific network can be found here: https://github.com/jab0707/TissueSlabSimulationDemo
Inverse Solution comparisons for using optimized cardiac positions, non optimized positions, and the true cardiac positions. This visualization comes from a study where we developed a noninvasive method to locaize the position of the heart using body surface potential maps and ECGI. DOI: 10.1016/j.compbiomed.2021.105174
Uncertainty quantification of simulated zones of myocardial ischemia as compared to measured ischemic regions. Panel A: Column one shows isosurfaces of the measured ischemic regions. The black line shows the cut plane for subsequent visualization, with the eye glyph pointing in the direction of visualization. Column two shows the measured extracellular potentials throughout the heart volume. Column three shows the PCE mean forward solution using the passive bidomain. Column four shows the PCE standard deviation due to variation in the four ischemic conductivity values (extracellular longitudinal and transverse, and intracellular longitudinal and transverse. Panel B: Column one shows the sensitivity due to variation in the extracellular longitudinal conductivity ( σ eL ). Column two shows the sensitivity due to variation in the extracellular transverse conductivity ( σ eT ). Column three shows the sensitivity due to variation in the intracellular longitudinal conductivity ( σ iL ). Column four shows the sensitivity due to variation in the intracellular transverse conductivity ( σ iT ). Results adapted with permission from Bergquist et al. (“Uncertainty quantification simulations of myocardial ischemia,” in 2021 Computing in Cardiology, in Press, 2021.)
Half of a Pericardiac Electrode array for recording electrical signals from an isolated heart. This recording array was developed by the CEG and manufactured at the Norra Eccles Harrison Cardiovascular Research and Training Institute. Data from this electrode array is featured in several of my publications.
reconstruction.mp4An example of the results from a paper I published titled "Reconstruction of cardiac position using body surface potentials". Here we see the results of position estimation (blue) as compared to the ground truth position (red) for 100 heartbeats, each with a different position. These reconstructions were performed using only noninvasively measured body surface potentials. Read more here: https://www.sciencedirect.com/science/article/pii/S0010482521009689?dgcid=author#appsec1
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