| 摘要 |
<P>PROBLEM TO BE SOLVED: To output a synchronization signal with less noise to an MRI device by removing an induction voltage (the noise) received from a gradient magnetic field, etc., from a signal to be detected by an electrocardiograph. <P>SOLUTION: The electrocardiograph 5 includes electrodes 1, 2 to come into contact with a subject so as to detect the signals of the subject via wire materials from the electrodes. As the wire materials, two pair lines 4a, 4b are arranged, each of which is tightly attached by holding an insulating material and makes a pair with the use of the wire material for a signal connected to the electrode at one end and the dummy wire material. The dummy wire materials are connected with a pseudo resistor 3 at one end of the respective pair lines. The other ends of the respective dummy wire materials are directly connected to the other ends (A-points) of the wire materials for the signal in the other pair line, so as to allow the received induction voltages to be mutually in opposite phase. <P>COPYRIGHT: (C)2007,JPO&INPIT |
