Determination of three-dimensional torso, heart and electrode geometries from magnetic resonance images

摘要: 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 195-channel data recording system. Limitations imposed by the intense magnetic field system that metallic electrodes be replaced with nonmetallic oil-filled phantom electrodes. These are easily delineated in MRI images. Transverse sections subject imaged at 10-mm intervals. Digital representing resulting images transferred to Macintosh II computer definition boundaries. This is practical technique geometrical solutions. >