| 发明名称 |
|
| 摘要 |
An adaptive filtering system is used to reduce the electrical noise on low power ECG signals and the like as generated by rapidly switched magnetic gradient fields in magnetic resonance imaging. A correlated noise reference signal is derived from the inputs to the gradient coils by a combination differentiator and low pass filter. The noise reference signal is received by a filter having adjustable coefficients and the result subtracted from the low power signal to produce an error signal used to adjust the coefficients of the filter. Three separate adaptive filters may be placed in series each with a separate correlated noise reference signal to reduce the noise from three gradient coils <IMAGE> |
| 申请公布号 |
JPH0616771(B2) |
申请公布日期 |
1994.03.09 |
| 申请号 |
JP19910210505 |
申请日期 |
1991.07.29 |
| 申请人 |
GEN ELECTRIC |
发明人 |
KEBIN SUKOTSUTO KUREGAA;CHAARUZU ROBAATO JORUDANO |
| 分类号 |
A61B5/0402;A61B5/0424;A61B5/055;G01R33/32;G01R33/385 |
主分类号 |
A61B5/0402 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
