Apparatus and method for removing magnetic resonance...

Surgery – Diagnostic testing – Cardiovascular

Reexamination Certificate

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C128S901000

Reexamination Certificate

active

07039455

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.

REFERENCES:
patent: 3868947 (1975-03-01), Holsinger
patent: 4677986 (1987-07-01), DeCote, Jr.
patent: 4887609 (1989-12-01), Cole, Jr.
patent: 4991580 (1991-02-01), Moore
patent: 4991587 (1991-02-01), Blakeley et al.
patent: 5025808 (1991-06-01), Hafner
patent: 5038785 (1991-08-01), Blakeley et al.
patent: 5052398 (1991-10-01), Gober
patent: 5209233 (1993-05-01), Holland et al.
patent: 5217010 (1993-06-01), Tsitlik et al.
patent: 5394873 (1995-03-01), Kraemer et al.
patent: 5411023 (1995-05-01), Morris, Sr. et al.
patent: 5417221 (1995-05-01), Sickler
patent: 5427111 (1995-06-01), Traub et al.
patent: 5436564 (1995-07-01), Kreger et al.
patent: 5467034 (1995-11-01), Manlove et al.
patent: 5511553 (1996-04-01), Segalowitz
patent: 5691641 (1997-11-01), Cansell et al.
patent: 5724967 (1998-03-01), Venkalachalam
patent: 5733247 (1998-03-01), Fallon
patent: 5743859 (1998-04-01), Wodlinger et al.
patent: 5782241 (1998-07-01), Felblinger et al.
patent: 5987348 (1999-11-01), Fischer et al.
patent: 6032063 (2000-02-01), Hoar et al.
patent: 6032069 (2000-02-01), Elgavish et al.
patent: 6052614 (2000-04-01), Morris, Sr. et al.
patent: 6073039 (2000-06-01), Berson
patent: 6148229 (2000-11-01), Morris, Sr. et al.
patent: 6198285 (2001-03-01), Kormos et al.
patent: 6201981 (2001-03-01), Yarita
patent: 6270463 (2001-08-01), Morris, Sr. et al.
patent: 0132785 (1985-02-01), None
Laudon, Michael K., “Minimizing Interference From Magnetic Resonance Imagers During Electrocardiography,” IEEE Transactions on Biomedical Engineering, vol. 45, No. 2 (Feb. 1998).
Shellock, Frank G., “Monitoring During MRI,” Medical Electronics Journal, vol. 17, No. 4, Issue 100 pp. 93-97 (Sep. 1986).
Karlik, S.J., “Patient Anesthesia And Monitoring At A 1.5T MRI Installation,” Magnetic Resonance In Medicine 7:210-211 (1988).
Felblinger et al., Restor. of Electrophys. Signals Distorted by Inductive Effects of Mag. Field Gradients During MR Sequences, Magnetic Res. in Medicine 41:715-721 (1999).

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