US 12,189,012 B2
System and method for electromagnetic interference mitigation for portable MRI systems
Lawrence L. Wald, Cambridge, MA (US); Clarissa Zimmerman-Cooley, Boston, MA (US); Sai Abitha Srinivas, Boston, MA (US); and Stephen Cauley, Cambridge, MA (US)
Assigned to The General Hospital Corporation, Boston, MA (US)
Appl. No. 17/996,856
Filed by The General Hospital Corporation, Boston, MA (US)
PCT Filed Apr. 26, 2021, PCT No. PCT/US2021/029164
§ 371(c)(1), (2) Date Oct. 21, 2022,
PCT Pub. No. WO2021/217135, PCT Pub. Date Oct. 28, 2021.
Claims priority of provisional application 63/015,092, filed on Apr. 24, 2020.
Prior Publication US 2023/0132819 A1, May 4, 2023
Int. Cl. G01R 33/56 (2006.01); G01R 33/422 (2006.01); G01R 33/44 (2006.01)
CPC G01R 33/5608 (2013.01) [G01R 33/422 (2013.01); G01R 33/44 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for generating a magnetic resonance image, the method comprising:
(a) acquiring magnetic resonance data from a subject using a magnetic resonance imaging (MRI) system using a pulse sequence, wherein the magnetic resonance data include primary calibration data acquired during a dead-time of the pulse sequence;
(b) acquiring electromagnetic interference (EMI) signal data using at least one EMI detector positioned external to an imaging volume of the MRI system, wherein the EMI signal data include external calibration data acquired during the dead-time of the pulse sequence;
(c) generating corrected magnetic resonance data by:
computing an EMI correction model using the primary calibration data in the magnetic resonance data and the external calibration data in the EMI signal data;
applying the EMI correction model to the EMI signal data, generating output as correction data; and
subtracting the correction data from the magnetic resonance data, generating output as the corrected magnetic resonance data, wherein artifacts associated with electromagnetic interference are reduced as compared to the magnetic resonance data acquired in step (a); and
(d) reconstructing an image from the corrected magnetic resonance data, wherein artifacts associated with electromagnetic interference are mitigated in the image.