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Medientyp:
E-Artikel
Titel:
Design of a folded, double-tuned loop coil for 1 H/X-nuclei MRI applications
Beteiligte:
Hong, Suk-Min
[Verfasser:in];
Choi, Chang-Hoon
[Verfasser:in];
Shah, N. J.
[Verfasser:in];
Felder, Jorg
[Verfasser:in]
Erschienen:
IEEE, 2022
Erschienen in:IEEE transactions on medical imaging 42(5), 1424 - 1430 (2022). doi:10.1109/TMI.2022.3228305
Sprache:
Englisch
DOI:
https://doi.org/10.1109/TMI.2022.3228305
ISSN:
1558-0062;
0278-0062;
1558-254X
Entstehung:
Anmerkungen:
Diese Datenquelle enthält auch Bestandsnachweise, die nicht zu einem Volltext führen.
Beschreibung:
MR measurement using a combination of X-nuclei and proton MRI is of great interest as the information provided by the two nuclei is highly complementary, with the X-nuclei signal giving metabolic data relating to potential biomarkers and the proton signal affording anatomical details. Due to the relatively weak signal obtained from X-nuclei, combining an X-nuclei coil with a proton coil is also advantageous for B0 shimming and scout images. One approach to building a double-resonant coil is to modify the coil geometry. Here, to achieve double-resonance, a 2× 1 ladder network was designed and tuned at both proton and X-nuclei frequencies successfully. Due to coupling between closed wires, the double-tuned coil generates a shifted transmit efficiency pattern compared to that of the single-tuned loop at the 7T MRI proton frequency. To compensate for the shifted pattern, one part of the 2× 1 ladder network was folded, and the tuning and performance of the folded double-tuned coil were evaluated in simulations and MR measurements. The proposed structure was further evaluated with overlapped decoupling in a receive-only array. The results show that our proposed folded double-tuned coil moderated the shifted pattern of a straight double-tuned loop coil and provided minimum losses at both proton and X-nuclei frequencies. The proposed folded double-tuned loop coil has also been further extended to a receive-only array.