Independent active decoupling circuit for RX coil on MR systems without active decoupling capabilities (0.2T) or with connecting issues (3T).
Thomas Feuillet 1,2 , Herve Saint-Jalmes 3,4 , Marie-Jose Seurin 2 , Michele Zani 5 , Alejandro Bordelois 6 , and Olivier Beuf 1
Universit de Lyon, CREATIS ; CNRS UMR 5220
; INSERM U1044 ; INSA-Lyon ; Universit Lyon 1,
Cirma, Marcy l'Etoile, France,
; INSERM U1099, Universit Rennes 1, Rennes, France,
Centre Eugene Marquis, Rennes, France,
Technologies, Oxford, United Kingdom,
Universidad de Oriente, Santiago, Cuba
Some 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.
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