%0 Journal Article
%A Hong, Suk-Min
%A Choi, Chang-Hoon
%A Shah, N Jon
%A Felder, Jörg
%T Design and evaluation of a 1 H/ 31 P double-resonant helmet coil for 3T MRI of the brain
%J Physics in medicine and biology
%V 64
%N 3
%@ 1361-6560
%C Bristol
%I IOP Publ.
%M FZJ-2019-03018
%P 035003 -
%D 2019
%X Proton magnetic resonance imaging (MRI) can be combined with signals from non-proton nuclei (X-nuclei) to provide metabolic information. Double-resonant coils are often used for X-nuclei MR studies where the proton element is employed for scout imaging and B 0 shimming. This work describes the development of a new double-resonant coil capable of operating at both proton and X-nuclei frequencies.The proposed design extends the wheel-and-spoke coil, which allows for quadrature drive, by adding an extra ring outside the coil to achieve double-resonance. Furthermore, in order to maximise SNR by increasing the filling factor, the shape of the coil has been modified to a helmet style making it suitable for brain applications.The performance of the double-resonant helmet coil was evaluated by simulation and MR measurements. The helmet coil was successfully tuned to the 1H/31P resonance frequencies of a 3T MR scanner, with high isolation between the two quadrature ports. MR measurements of a phantom were carried out, and the averaged sensitivity of the double-resonant helmet coil over the whole phantom was found to be higher than that of the conventional double-tuned birdcage coil at both frequencies.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:30566926
%U <Go to ISI:>//WOS:000456840500002
%R 10.1088/1361-6560/aaf9e2
%U https://juser.fz-juelich.de/record/862799