A Latent Force Model for Describing Electric Propagation in Deep Brain Stimulation: A Simulation Study

Alvarado, Pablo A. ;   Alvarez, Mauricio A. ;   Daza-Santacoloma, Genaro ;   Orozco, Alvaro ;   Castellanos-Dominguez, Germán

Tags Deep brain stimulationDeep brain stimulation - FEM-Neuron modelsBrain physiology and modeling - Neuron modeling and simulation

Deep brain stimulation (DBS) is a neurosurgical method used to treat symptoms of movement disorders by implanting electrodes in deep brain...

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Entropy-Based Multichannel Stationary Measure for Characterization of Motor Imagery Patterns

Martínez-Vargas, Juan David ;   Castro Hoyos, Cristian ;   Castellanos-Dominguez, Germán

Tags Nonstationary processing of biomedical signalsTime-frequency analysis of biosignalsMultivariate signal processing

We propose a novel approach for measuring the stationarity level in a multichannel time-series. This measure is based on stationarity...

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Feature Selection for Discrimination of Fractionation Levels in Atrial Electrograms

Orozco-Duque, Andres ;   Martínez-Vargas, Juan David ;   Novak, Daniel ;   Bustamante, John ;   Castellanos-Dominguez, Germán

Tags Cardiovascular signal processingAtrial arrhythmias and ablation

Radiofrequency catheter ablation of atrial fibrillation (AF) guided by complex fractionated atrial electrograms (CFAE) is associated with a...

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Fractionated Electrograms and Rotors Detection in Chronic Atrial Fibrillation Using Model-Based Clustering

Orozco-Duque, Andres ;   Duque, Sara Isabel ;   Ugarte, Juan Pablo ;   Tobon, Catalina ;   Kremen, Vaclav ;   Novak, Daniel ;   Saiz, Javier ;   Castellanos-Dominguez, Germán ;   Bustamante, John

Tags Atrial arrhythmias and ablationCardiovascular signal processingSimulation method developments for cardiac arrhythmia studies

The identification of atrial fibrillation (AF) substrates is needed to improve ablation therapy guided by electrograms, although mechanisms...

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Identification of Brain Networks Using Time-Varying Spatial Constraints of Neural Activity Reconstruction

Castaño-Candamil, Juan Sebastián ;   Martínez-Vargas, Juan David ;   Castellanos-Dominguez, Germán

Tags Connectivity measurementsKalman filteringMultivariate signal processing

Electroencephalographic (EEG) data give a direct non-invasive measurement of neural brain activity. Nevertheless, common assumption about EEG...

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Influence of Anisotropic White Matter Modeling on EEG Source Localization

Cuartas, Ernesto ;   Cardenas-Peña, David ;   Castellanos-Dominguez, Germán

Tags Brain functional imaging - EEGBrain functional imaging - Source localizationBrain functional imaging - Segmentation

We study the influence of the anisotropic white matter within the ElectroEncephaloGraphy source localization problem. To this end, we consider...

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Kernel-Based Atlas Image Selection for Brain Tissue Segmentation

Cardenas-Peña, David ;   Orbes-Arteaga, Mauricio ;   Castellanos-Dominguez, Germán

Tags Image segmentationBrain image analysisImage feature extraction

We propose a new Kernel-based Atlas Image Selection computed in the Embedding Representation space (termed KAISER) aiming to support...

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Multiobjective Optimization-based Design of Wearable Electrocardiogram Monitoring Systems

Martinez-Tabares, Francisco Javier ;   Jaramillo Garzón, Jorge Alberto ;   Castellanos-Dominguez, Germán

Tags Medical device modelingAlgorithms and techniques for systems modeling

Nowadays, the use of Wearable User Interfaces has been extensively growing in medical monitoring applications. However, production and...

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Tensor-Product Kernel-Based Representation Encoding Joint MRI View Similarity

Alvarez-Meza, Andres Marino ;   Cardenas-Peña, David ;   Castro-Ospina, Andrés Eduardo ;   Castellanos-Dominguez, Germán ;   Alvarez, Mauricio A.

Tags Image enhancementImage feature extractionImage classification

To support 3D magnetic resonance image (MRI) analysis, a marginal image similarity (MIS) matrix holding MR inter-slice relationship along every...

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Three-Layer-Isotropic Skull Conductivity Representation in the EEG Forward Problem Using Spherical Head Models

Cuartas, Ernesto ;   Hallez, Hans J. ;   Vanrumste, Bart ;   Castellanos-Dominguez, Germán

Tags Brain functional imaging - EEGBrain functional imaging - Source localization

We study the influence of different conductivity models within the framework of electroencephalogram (EEG) source localization on the white...

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Very Long-Term ECG Monitoring Patch with Improved Functionality and Wearability

Martinez-Tabares, Francisco Javier ;   Gaviria, Natalia ;   Castellanos-Dominguez, Germán

Tags Wearable systemsSmart textile and clothesPortable miniaturized systems

Heart activity monitoring is an important task for prevention and treatment of cardiovascular diseases. However, development of long-term,...

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