ARTIFACT REMOVAL FROM PHYSIOLOGICAL SIGNALS

摘要

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.