US 11,747,416 B1
System and method for stabilizing surface coil
Robert Steven Stormont, Hartland, WI (US); Victor Taracila, Beachwood, OH (US); Fraser John Laing Robb, Aurora, OH (US); Thomas Grafendorfer, Mill Valley, CA (US); Louis Jay Vannatta, Crystal Lake, IL (US); and Yun-Jeong Stickle, Solon, OH (US)
Assigned to GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed by GE Precision Healthcare LLC, Wauwatosa, WI (US)
Filed on Apr. 8, 2022, as Appl. No. 17/716,230.
Int. Cl. G01R 33/36 (2006.01)
CPC G01R 33/3628 (2013.01) [G01R 33/3621 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A preamplifier arrangement for a magnetic resonance imaging (MRI) system, comprising:
a preamplifier coupled to a loop of a multi-channel coil array of the MRI system, wherein the preamplifier and the loop are subject to potentially form an unstable system with oscillation at one or more peak frequencies;
an impedance matching network disposed between and coupled to the preamplifier and the loop, wherein the impedance matching network is configured to generate a high blocking impedance; and
an input network disposed between and coupled to the preamplifier and the loop, wherein the input network is configured to provide an input to suppress gain at the one or more peak frequencies, and wherein the input network is a distributed input network built-in to the impedance matching network.