Title :
Determination of three-dimensional torso, heart and electrode geometries from magnetic resonance images
Author :
Ershler, P.R. ; Lux, R.L. ; Green, L.S. ; Caputo, G.R. ; Parker, D.
Author_Institution :
Nora Eccles Cardiovascular Res. & Training Inst., Utah Univ., Salt Lake City, UT, USA
Abstract :
ECG (electrocardiogram) inverse solutions require accurate determination of three-dimensional torso, heart, and electrode geometries. Magnetic resonance imaging (MRI) provides a noninvasive method for obtaining this information. Subjects initially undergo body surface potential mapping using a 195-channel data recording system. Limitations imposed by the intense magnetic field of the imaging system require that the metallic recording electrodes be replaced with nonmetallic oil-filled phantom electrodes. These are easily delineated in the MRI images. Transverse MRI sections of the subject are imaged at 10-mm intervals. Digital data representing the resulting images are transferred to a Macintosh II computer for definition of surface boundaries. This is a practical technique for obtaining geometrical data for ECG inverse solutions.<>
Keywords :
biomedical NMR; computerised picture processing; data loggers; electrocardiography; medical computing; 195-channel data recording; ECG; MRI; Macintosh II computer; body surface potential mapping; electrocardiogram; heart; imaging system; magnetic resonance images; magnetic resonance imaging; metallic recording electrodes; nonmetallic oil-filled phantom electrodes; torso;
Conference_Titel :
Engineering in Medicine and Biology Society, 1988. Proceedings of the Annual International Conference of the IEEE
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0785-2
DOI :
10.1109/IEMBS.1988.94436
