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.
Claims29
A method of operating a magnetic resonance imaging (MRI) system to avoid noise in an environment of the MRI system, the method comprising:
- obtaining at least one noise measurement of the environment from each of a plurality of frequency bands within a spectrum of interest;
- selecting one of the plurality of frequency bands based, at least in part, on the respective at least one noise measurement;
- and
- configuring at least one primary transmit/receive coil of the low-field MRI system to operate at a frequency within the selected frequency band.
A magnetic resonance imaging (MRI) system capable of being configured to operate in different modes to avoid noise in an environment of the MRI system, the MRI system comprising:
- at least one primary transmit/receive coil to detect magnetic resonance signals;
- and
- at least one controller configured to receive at least one noise measurement of the environment for each of a plurality of frequency bands within a spectrum of interest, select one of the plurality of frequency bands based, at least in part, on the respective at least one noise measurement, and configure the at least one primary transmit/receive coil to operate at a frequency within the selected frequency band.
A method of suppressing noise detected in an environment of a magnetic resonance imaging system, the method comprising:
- acquiring at least one first magnetic resonance signal by applying a first pulse sequence using a first spatial encoding;
- acquiring at least one second magnetic resonance signal by applying the first pulse sequence using the first spatial encoding;
- computing a difference between the at least one first magnetic resonance signal and the at least one second magnetic resonance signal;
- and
- estimating noise based, at least in part, on the computed difference.
An apparatus for suppressing noise detected in an environment of a magnetic resonance imaging system, the system comprising:
- at least one transmit/receive coil configured to, when operated, produce a magnetic field configured to excite a magnetic resonance response, and to detect magnetic resonance signals;
- at least one gradient coil for spatial encoding;
- and
- at least one controller configured to:
- operate the at least one transmit/receive coil and the at least one gradient coil according to a first pulse sequence using a first spatial encoding to acquire at least one first magnetic resonance signal;
- operate the at least one transmit/receive coil and the at least one gradient coil according to the first pulse sequence using the first spatial encoding to acquire at least one second magnetic resonance signal;
- compute a difference between the at least one first magnetic resonance signal and the at least one second magnetic resonance signal;
- and
- estimate noise based, at least in part, on the computed difference.
Dependencies are inferred from the claim text.