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With an expert system, a novel fuzzy c-means clustering method based on PSO and expert system (PSFCM-ES) is proposed in this paper. The algorithm is formulated by incorporating the spatial neighborhood information into the standard FCM clustering algorithm. The k-nearest neighbor (k-NN) algorithm is introduced for calculating the weight in the spatially weighted FCM algorithm so as to improve the...
We reviewed the principles and applications of electrophysiological source imaging as applied to imaging electrical activity in the brain and heart. We discussed the historical development and state of arts of electrophysiological source imaging. Important trends of future development were also reviewed.
The finite element (FE) modeling of a realistic head is a key issue for the finite element analysis of brain electromagnetic field. In the present study, we have developed a new method to generate subject specific FE head models based on their magnetic resonance (MR) and computer tomography (CT) imaging data. The present approach consists of three parts: segmentation of MR and CT images, co-registration...
This paper evaluates a biophysical-model based three-dimensional (3-D) activation sequence imaging approach in a rabbit model. In this approach, cardiac electrical sources within the myocardial volume are represented by distributed equivalent current densities; a realistic heart-torso volume conductor model is built from the CT scans of the rabbit's torso; spatial-temporal regularization is applied...
A novel method for CT image segmentation of brain is proposed in this paper, with which, several regions that are suspicious of having pathological changes can be segmented rapidly and effectively. To avoid the affection of extra-cranial highlight pixels in the later processing, row scanning approach is introduced firstly to search for the boundary of the skull. Secondly, combined with morphological...
We review our recent work on the development and evaluation of three-dimensional electrocardiographic imaging technology (3DEIT). Cardiac electrophysiological properties, including activation time and transmembrane potentials, are estimated from body surface ECG signals with the aid of a realistic geometry heart model in which electrophysiological a priori information is incorporated. We have conducted...
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