Abstract
Seven Tesla Magnetic Resonance (MR) systems can obtain high quality anatomical images using protons (1H) and can be used for multinuclear imaging and MR spectroscopy. These imaging modes can also obtain images and metabolic information using other nuclei, such as 19F, 31P, and 23Na. Here, we present an RF coil unit using a microstrip capable of resonating at four frequencies: 300 (1H), 280 (19F), 121 (31P), and 78 (23Na) MHz. The RF unit consists of a single feeding port and four lines that resonate and run a current at their respective frequency. We used the gapped microstrip concept to isolate each conducting line and interleaved the dielectric materials used for each line, thereby reducing the coupling between them. We also analyzed this design using electromagnetic (EM) simulations, and found that the quad tuned arrangement produced low coupling between adjacent current lines and achieved a uniform |B1| field in the z-y plane.
Highlights
As X-nuclei MRIMagnetic resonance imaging (MRI) can be used for diagnosing early stage cancers, tumors, lesions, and pathogens, it has become a widely studied technique in recent years
All simulations were performed with the conducting surface set as a perfect electric conductor with 0 mm thickness; the database for materials provided by the software was set to match the electric properties of the dielectric materials
We present the detailed design for a microstrip capable of resonating at four different frequencies for X-nuclei MRI
Summary
The increase in B0 affects the number of spins available for excitation, and the Larmor’s frequency at which the spins enter into resonance [5,6,7]. This increase in the Larmor frequency and the number of spins for excitation allows additional nuclei besides protons (1 H) to be used for acquiring MR images; this phenomenon is referred to as multi-nuclei MR imaging [8,9,10,11,12,13] or X-nuclei MRI. Sodium 23 Na, phosphorus 31 P, and fluorine 19 F are among the most used nuclei for X-nuclei imaging
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
