Mapping of electrical endocardial activity is an important task for cardiac diagnosis and surgical treatment planning. Different kinds of catheters measure this activity with a limited number of electrodes. In recent years an increasing number of mapping systems is used in clinical routine. Various systems have been introduced and discussed in literature. This work deals with the localization of catheter electrodes in the heart with advanced techniques of digital image processing. The catheters - developed by various enterprises - differ in shape, handling and amount of electrodes. They are specified and presented in detail. Digital image analysis techniques like filters, Fourier and Hough transformation build the background and basics for this work. The main part describes the methods for the detection of the electrodes and the catheter strings. With these methods, it is possible to setup computer models for each catheter. The computer models can be used e. g. in numerical field calculation together with medical tomographic datasets.
Book Chapters (1)
I. H. d. Boer, W. Maurer, F. R. Schneider, and O. Dössel. Matching von dreidimensionalen Elektrodenpositionen ausgehend von biplanaren Röntgenbildverstärkern und CCD-Farbkameras. In Bildverarbeitung für die Medizin 1999, Springer, Berlin Heidelberg New York, pp. 70-74, 1999
Conference Contributions (8)
I. H. d. Boer, F. B. Sachse, and O. Dössel. Ein modellbasierter Ansatz zur Lokalisation von Basket-Kathetern für endokardiales Mapping. In Biomedizinische Technik, vol. 45-1, pp. 57-58, 2000
I. H. d. Boer, F. B. Sachse, and O. Dössel. A Model Based Approach for Localization of Basket Catheters for Endocardial Mapping. In Proc. CARS 2000, pp. 1004-1007, 2000
I. H. d. Boer, F. B. Sachse, and O. Dössel. Matching of intracardial and extracorporal electrode positions with segmented volume datasets of the human thorax. In Proc. CARS 1999, pp. 1006, 1999
I. H. d. Boer, F. B. Sachse, and O. Dössel. Entwicklung eines 4-Kamera-Systems zur Lokalisation einer Elektrodenanordnung auf dem Thorax. In Biomedizinische Technik, vol. 43-1, pp. 56-57, 1998
Clinical measurements of atrial excitation propagation were performed to validate the results of noninvasive cardiac source reconstructions. Epicardial potentials and transmembrane voltages were reconstructed using an individual volume conductor model of the patient. Activation times were measured with a basket catheter and compared with the time course of the reconstructed epicardial potentials and transmembrane voltages.
I. H. d. Boer. 3D-Lokalisation von Elektroden bei der Multikanal-EKG-Ableitung mittels Analyse von Stereofarbaufnahmen. Universität Karlsruhe (TH), Institut für Biomedizinische Technik. . 1997
I. H. d. Boer. Dreidimensionale Lokalisation einer Elektrodenanordnung mittels Analyse von Stereofarbaufnahmen. Universität Karlsruhe (TH), Institut für Biomedizinische Technik. Diplomarbeit. 1997