Noise suppression methods and apparatus
AssigneeHyperfine Research, Inc.
InventorsTodd Rearick, Gregory L. Charvat, Matthew Scot Rosen, Jonathan M. Rothberg
Life of this patent
Estimating the term…
Abstract
According to some aspects, a method of suppressing noise in an environment of a magnetic resonance imaging system is provided. The method comprising estimating a transfer function based on multiple calibration measurements obtained from the environment by at least one primary coil and at least one auxiliary sensor, respectively, estimating noise present in a magnetic resonance signal received by the at least one primary coil based at least in part on the transfer function, and suppressing noise in the magnetic resonance signal using the noise estimate.
Claims27
A method of suppressing noise in an environment of a magnetic resonance imaging system, the method comprising:
- obtaining, using at least one primary coil and at least one auxiliary sensor different from the at least one primary coil, multiple calibration signals comprising a first plurality of calibration signals and a corresponding second plurality of calibration signals by:
- obtaining the first plurality of calibration signals using the at least one auxiliary sensor, wherein each of the first plurality of calibration signals comprises multiple values;
- and
- obtaining the second plurality of calibration signals using the at least one primary coil, wherein each of the first plurality of calibration signals comprises multiple values;
- estimating, based on the multiple calibration signals, a transform that, when applied to noise received by the at least one auxiliary sensor, provides an estimate of noise received by the at least one primary coil;
- and
- after estimating the transform:
- receiving a magnetic resonance signal using the at least one primary coil;
- receiving a noise signal using the at least one auxiliary sensor;
- estimating noise present in the magnetic resonance signal received by the at least one primary coil by applying the transform to the noise signal received by the at least one auxiliary sensor to obtain a noise estimate;
- and
- suppressing noise in the magnetic resonance signal using the noise estimate.
A magnetic resonance imaging (MRI) system comprising:
- at least one primary coil;
- at least one auxiliary sensor different from the at least one primary coil;
- and
- at least one controller configured to:
- cause the at least one primary coil and the at least one auxiliary sensor to obtain a first plurality of calibration signals and a second plurality of calibration signals, respectively, from an environment of the magnetic resonance imaging system, wherein each of the first plurality of calibration signals includes multiple values and each of the second plurality of calibration signals includes multiple values;
- estimate, based on the first plurality of calibration signals and the second plurality of calibration signals, a transform that, when applied to noise received by the at least one auxiliary sensor, provides an estimate of noise received by the at least one primary coil;
- and
- after estimating the transform:
- cause the at least one primary coil to receive a magnetic resonance signal;
- cause the at least one auxiliary sensor to receive a noise signal;
- estimate noise present in the magnetic resonance signal received by the at least one primary coil by applying the transform to the noise signal received by the at least one auxiliary sensor to obtain a noise estimate;
- and
- suppress noise in the magnetic resonance signal using the noise estimate.
Dependencies are inferred from the claim text.