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Abstract #1582

Active Shielding of RF Traps

David O Brunner1, Thomas Schmid1, Samuel Sollberger1, and Simon Gross1
1Skope MRT, Zurich, Switzerland

Synopsis

Keywords: RF Arrays & Systems, RF Arrays & Systems, Balun and RF traps

Motivation: Baluns and RF traps are resonant structures and coupling among each other, as well as to receive and transmit coils must be avoided. This is a particular challenge for the efficient and compact class of wound inductor traps.

Goal(s): Wound inductor trap that is isolated from external fields, does not require metallic shielding surfaces and can be wound compactly also for cables with limited bending radius.

Approach: Employing the method of active shielding known from gradient coil design to RF trap inductors.

Results: RF traps with shielding properties comparable to metal sheath shielded versions with very low eddy current profile.

Impact: Compact and efficient RF traps can help to design better and safer RF coils. Requiring no metal sheath for shielding of the trap can help to reduce gradient-switching-induced vibrations and heating.

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