Active noise cancellation apparatus in MRI apparatus

Details Active noise cancellation apparatus in MRI apparatus Active noise cancellation apparatus in MRI apparatus

1994-10-28

1995-06-27

Pfaffle, Krista M.

Surgery

Truss

Pad

1286535, 381 71, 381 94, 324318, A61B 5055, H04B 1500

Patent

active

054271029

ABSTRACT:
An active noise cancellation apparatus of an MRI apparatus, including a detector for detecting vibration of a bobbin or a driving signal of a magnetism generator as a noise source signal, error signal detectors for detecting actual noise near the ears of a patient, a circuit for generating a noise cancellation signal having an opposite phase to a phase of a noise signal generated by an MRI apparatus and having an amplitude proportional to the output of the error signal detectors, from the detected noise source signal and the output of the error signal detectors, and a sound generator for generating a sound wave by the noise cancellation signal.

REFERENCES:
patent: 4654871 (1987-03-01), Chaplin et al.
patent: 4696030 (1987-09-01), Egozi
patent: 4701952 (1987-10-01), Taylor
patent: 4878499 (1989-11-01), Suzuki et al.
patent: 4903703 (1990-02-01), Igarashi et al.
patent: 4981137 (1991-01-01), Kondo et al.
patent: 5033082 (1991-07-01), Eriksson et al.
patent: 5076275 (1991-12-01), Bechor et al.
patent: 5084676 (1992-01-01), Saho et al.
patent: 5133017 (1992-07-01), Shimode et al.

Affiliated with

Also associated with

Rating

Active noise cancellation apparatus in MRI apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active noise cancellation apparatus in MRI apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active noise cancellation apparatus in MRI apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-281461