US 12,270,872 B2
Asymmetric single-channel radio frequency helmet coil for magnetic resonance imaging
Lawrence L. Wald, Cambridge, MA (US); Clarissa Zimmerman-Cooley, Boston, MA (US); Patrick C. McDaniel, Boston, MA (US); and Sai Abitha Srinivas, Boston, MA (US)
Assigned to The General Hospital Corporation, Boston, MA (US)
Appl. No. 17/996,857
Filed by The General Hospital Corporation, Boston, MA (US)
PCT Filed Apr. 26, 2021, PCT No. PCT/US2021/029175
§ 371(c)(1), (2) Date Oct. 21, 2022,
PCT Pub. No. WO2021/217137, PCT Pub. Date Oct. 28, 2021.
Claims priority of provisional application 63/015,172, filed on Apr. 24, 2020.
Prior Publication US 2023/0144076 A1, May 11, 2023
Int. Cl. A61B 5/055 (2006.01); A61B 5/00 (2006.01); G01R 33/34 (2006.01)
CPC G01R 33/34084 (2013.01) [A61B 5/055 (2013.01); A61B 5/6803 (2013.01); G01R 33/34007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio frequency (RF) coil system for performing a magnetic resonance imaging (MRI) process using an MRI system, the RF coil system comprising:
a substrate configured to follow a contour of a portion of a subject to be imaged by the MRI system; and
at least one RF coil coupled to the substrate and forming an asymmetrical three-dimensional spiral pattern extending over the substrate, wherein the asymmetrical three-dimensional spiral pattern includes adjacent portions of the at least one RF coil that are non-uniformly spaced apart over the substrate, wherein the three-dimensional spiral pattern is arranged to produce a homogeneous target field within a region-of-interest and to produce a transverse magnetic field that reduces a sensitivity of the at least one RF coil outside of the region-of-interest.