Dual-Tuned Monopole/Loop Coil Array for Concurrent RF Excitation and Reception Capability for MRI
| Autor: | Junghyun Song, Daniel Hernandez, Sang-Doc Han, Kyoung-Nam Kim |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Coil array business.industry Magnetic monopole General Physics and Astronomy Port (circuit theory) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Rf excitation Magnetic flux Loop (topology) Optics Electromagnetic coil 0103 physical sciences 0210 nano-technology business Monopole antenna |
| Zdroj: | Journal of the Korean Physical Society. 75:610-616 |
| ISSN: | 1976-8524 0374-4884 |
| Popis: | Radiofrequency (RF) coils based on two operating frequencies, or dual-tuned (DT) coils, for magnetic resonance imaging (MRI) in parallel with MR spectroscopy (MRS) and MR spectroscopy imaging (MRSI) are used to obtain morphological and metabolic information for early diagnosis of diseases. However, this method suffers from serious problems such as the extremely low signal sensitivity of X-nuclei and the long image acquisition time required for the two measurements. In this study, a single-channel DT coil was proposed for RF excitation/reception (Tx/Rx) of hydrogen (1H) and phosphorous (31P) by using a monopole antenna and a loop coil, and it was extended to an eight-channel volume coil at 7 T. To verify the DT coil performance, we compared the single RF port of the DT coil with monopole/loop geometry to the individual coil of the 1H monopole antenna and the 31P loop coil with a cylindrical phantom. The monopole/loop coil shows no magnetic flux interaction between individual coils despite the superimposed positions owing to the single RF port. The study results demonstrated that the proposed DT monopole/loop (DTML) coil can be extended to multiple RF Tx/Rx systems and can reduce the acquisition time with a single measurement. |
| Databáze: | OpenAIRE |
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