Arthur W. Magill1, Chang-Hoon Choi1, Yonghyun Ha1, and N. Jon Shah1,2
1Institute of Neuroscience and Medicine - 4, Forschungszentrum Juelich GmbH, Juelich, Germany, 2Department of Neurology, JARA, RWTH Aachen University, Aachen, Germany
Traps may be used
to dual-tune an RF probe, either by splitting the resonance of a single tuned
circuit, or by blocking coupling at the higher frequency when using a pair of
resonant circuits. This work combines both methods to construct a triple-tuned
probe consisting of a nested pair of loops. The inner loop incorporates two
traps, one to prevent coupling to the outer loop, which is tuned to 1H,
and a second to simultaneously tune the loop to 23Na and 31P.
The probe is designed for use at 4T, with resonances at 45MHz (23Na),
69MHz (31P) and 170MHz (1H).