Apparatus and method for removing magnetic resonance imaging-induced noise from ECG signals
US7039455B1 · kind B1 · utility
33Cited by
31References
18Claims
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Key dates
| Filing date | Sep 27, 2002 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Sep 27, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/901
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus and method is provided for improving the quality of electrocardiogram (ECG) signals obtained from a patient undergoing magnetic resonance imaging (MRI) wherein the ECG signal has relatively high levels of noise or interference voltages induced on it by changing magnetic fields. The apparatus includes the arrangement of a differential amplifier, a prefilter, a signal limiter (SL) circuit and an intermediate amplifier with an integral low pas filter. The prefilter limits the rise time or high frequency component of the noise or interfering voltages induced on the ECG that are presented to the signal limiter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.