Independent active decoupling circuit for RX coil on MR systems without active decoupling capabilities (0.2T) or with connecting issues (3T)

International audienceSome MR systems do not provide an active decoupling bias signal to RX coil and use only passive and/or geometrical decoupling. An external circuit which independently generates an active decoupling signal for RX coils for any MR system was developed. The circuit was tested on a 0.2T system with no active decoupling, and at 3T to demonstrate its interest when an additional dedicated RX coil is designed and its connection is unknown or third part coil is not allowed. Results were considered at both fields and were comparable to reference decoupling methods, in terms of delays, SNR and B1 uniformity