System and method for reducing auditory perception of noise associated with a medical imaging process

• US 7,268,548 B2
• Filed: 05/08/2006
• Issued: 09/11/2007
• Est. Priority Date: 05/06/2004
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Sellers, Michael Ben
• Primary Examiner(s): SHRIVASTAV, BRIJ B
• Application Number:
  US11/382,187
• Publication Number:
  US 20060208735A1
• Time in Patent Office: 491 Days
• Field of Search: 324300-322, 600/410, 348/217, 348/222
• US Class Current: 324/309
• CPC Class Codes: G01R 33/3854 means for active and/or passive vibration damping or acoustical noise suppression in gradient magnet coil systems

Abstract

A system and method for acoustic noise reduction/cancellation is disclosed that includes a medical imaging scanner configured to scan an imaging subject within an imaging area that emits system noise when in operation. An ultrasonic emitter system is included that is constructed to emit an inaudible signal having properties to reduce perception of the system noise about at least a portion of the imaging area.

Claims

1. A medical imaging scanner system comprising:

a medical imaging scanner configured to scan an imaging subject within an imaging area, wherein the medical imaging scanner emits system noise when in operation;

a noise detection device configured to provide a feedback of a predicted system noise based on a selected medical imaging process to be performed; and

an emitter system constructed to emit a signal having properties to reduce perception of the predicted system noise about at least a portion of the imaging area.

2. The medical imaging scanner system of claim 1 further comprising a parametric sound generator configured to generate the signal based on the feedback from the noise detection device.

3. The medical imaging scanner system of claim 1 further comprising a look-up table containing noise characteristics of the selected medical imaging process.

4. The medical imaging scanner system of claim 3 wherein the noise detection device is further configured to access the look-up table and determine the feedback therefrom.

5. The medical imaging scanner system of claim 1 wherein the medical imaging scanner is a magnetic resonance image scanner and the emitter system is arranged outside of a magnetic field of the magnetic resonance image scanner.

6. The medical imaging scanner system of claim 1 wherein the emitter system includes an emitter capable of columnular emissions.

7. The medical imaging scanner system of claim 6 wherein the emitter is arranged such that the columnular emissions are directed at a location to provide an imaging subject with a substantially noise free environment.

8. The medical imaging scanner system of claim 1 wherein at least a portion of the emitter system is arranged a distance from the imaging area.

9. The medical imaging scanner system of claim 1 further comprising another emitter system constructed to reduce perception of system noise about at least a portion of an operator area.

10. A method of medical imaging comprising:

selecting a medical imaging process to be performed upon an imaging subject, wherein the medical imaging process produces a noise byproduct;

predicting the noise byproduct of the selected imaging process;

performing the medical imaging process upon the imaging subject; and

emitting a signal configured to reduce perception of the predicted noise byproduct of the selected imaging process.

11. The method of claim 10 wherein the step of predicting further comprises predicting the noise generation prior to generation of the noise byproduct.

12. The method of claim 10 wherein the step of predicting further comprises accessing a look-up table comprising noise characteristics of the selected imaging process.

13. The method of claim 10 further comprising producing a column of ultrasonic energy configured to interact with atmospheric air to produce anti-noise audio frequencies when intermixed with an environmental air.

14. The method of claim 10 further comprising performing the medical imaging process on an imaging volume and emitting the signal outside of the imaging volume.

15. The method of claim 10 further comprising columnly emitting the signal to diminish auditory perception of the noise byproduct within a selected volume.

16. The method of claim 10 wherein the medical imaging process includes a magnetic imaging resonance imaging process.

17. An MRI apparatus comprising:

an MRI system having a plurality of gradient coils positioned about a bore of a polarizing magnet to impress a polarizing field, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images;

a noise detection device configured to predict noise that will be produced by an MRI system during processing of a selected imaging process;

a parametric signal generator configured to receive feedback from the noise detection device and to generate signals to reduce perception of the predicted noise therefrom.

18. The MRI apparatus of claim 17 further comprising a look-up table connected to the noise detection device, the look-up table comprising noise characteristics of the selected imaging process.

19. The MRI apparatus of claim 17 wherein the signals are configured to induce anti-noise signals upon interaction with environmental air.

20. The MRI apparatus of claim 19 wherein the anti-noise signals are contained within a propagation column.