Independent circuit for active decoupling of RX coil for systems without active decoupling at 0.2T or with connecting issues (3T)

International audienceDecoupling means are used in MRI both to protect electronics and to ensure patient safety by isolating reception (RX) coil from TX coil during transmission[1]. While widely used, some dedicated systems still do not exhibit active decoupling signal and use passive and/or geometrical configurations. Active decoupling has advantages against other methods, in terms of Signal-to-Noise Ratio (SNR) (high-Q components) or for better control of potential B1 distortions[2].An external circuit which independently generates an active decoupling signal for RX coils for any MR system was developed. This circuit was tested on a 0.2T system with no active decoupling, and at 3T to demonstrate its interest when additional RX coil is required and connection is unknown or not allowed