公开(公告)号：WO1997005823A1

公开(公告)日：1997-02-20

申请号：PCT/US1996012537

申请日：1996-08-05

Applicant: BIOMAGNETIC TECHNOLOGIES, INC.

Inventor： BIOMAGNETIC TECHNOLOGIES, INC. ,  KYNOR, David, B.

IPC: A61B05/05

CPC classification number: A61B5/0452 ,  A61B5/04007 ,  Y10S128/901

Abstract: A measured magnetocardiography signal has a relatively small heart signal mixed with a large noise signal. To produce a heart signal having a reduced noise content, the times of occurrence of a time series of isoelectric intervals (54) of the measured signal is first determined (42) and a time series isoelectric artifact curve is formed from the measurements made at those times of occurrence (44). A time series non-isoelectric artifact curve for other times is determined from this information. The time series isoelectric and non-isoelectric artifact curve is subtracted from the measured cardiography time series signal (46) to yield a time series heart amplitude signal having reduced noise and undistorted form.

Abstract translation: 测量的心电图信号具有与大噪声信号混合的相对较小的心脏信号。 为了产生具有降低的噪声含量的心脏信号，首先确定测量信号的等电位间隔（54）的时间序列的出现次数（42），并根据这些测量形成时间序列等电赝像曲线 发生次数（44）。 根据该信息确定其他时间的时间序列非等电赝像曲线。 从测量的心电图时间序列信号（46）中减去时间序列等电点和非等电赝像曲线，以产生具有降低的噪声和未失真形式的时间序列心脏振幅信号。