US 12,433,503 B2
Systems and methods of correcting effects of second-order concomitant fields in a magnetic resonance system with a second-order correction coil assembly
Seung-Kyun Lee, Cohoes, NY (US); Afis Ajala, Schenectady, NY (US); and Thomas Kwok-Fah Foo, Clifton Park, NY (US)
Assigned to GE PRECISION HEALTHCARE LLC, Wauwatosa, WI (US)
Filed by GE PRECISION HEALTHCARE LLC, Wauwatosa, WI (US)
Filed on Jan. 18, 2023, as Appl. No. 18/156,144.
Prior Publication US 2024/0237910 A1, Jul. 18, 2024
Int. Cl. G01R 33/565 (2006.01); A61B 5/055 (2006.01); G01R 33/385 (2006.01); G01R 33/3875 (2006.01); G01R 33/389 (2006.01)
CPC A61B 5/055 (2013.01) [G01R 33/385 (2013.01); G01R 33/3875 (2013.01); G01R 33/56554 (2013.01); G01R 33/56581 (2013.01); G01R 33/389 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A magnetic resonance (MR) system for correcting concomitant field effects, comprising:
a gradient coil assembly comprising a plurality of gradient coils configured to apply at least one gradient field to a polarizing magnetic field of the MR system;
a second-order correction coil assembly comprising a first second-order correction coil configured to correct effects of a first term of second-order concomitant fields generated by the at least one gradient field, wherein the second-order correction coil assembly further comprises a second second-order correction coil configured to correct a second term of the second-order concomitant fields, and the second-order correction coil assembly is configured to correct a third term of the second-order concomitant fields based on a combination of the first second-order correction coil and the second second-order correction coil, wherein the first term of the second-order concomitant fields, the second term of the second-order concomitant fields, and the third term of the second-order concomitant fields are different from one another; and
a second-order correction computing device comprising at least one processor in communication with at least one memory device, and the at least one processor programmed to:
control the second-order correction coil assembly by instructing the MR system to apply a compensation field to the second-order correction coil assembly asynchronously with the at least one gradient field, wherein the compensation field has a different shape of waveform from a waveform of the at least one gradient field.