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- Title
A dual <sup>1</sup>H/<sup>19</sup>F birdcage coil for small animals at 7 T MRI.
- Authors
Villa-Valverde, Palmira; Rodríguez, Ignacio; Padró, Daniel; Benito, Marina; Garrido-Salmon, Carlos Ernesto; Ruiz-Cabello, Jesús
- Abstract
Objective: Given the growing interest in fluorine, it is necessary to develop new multi-tuned RF coils. Therefore, our objective is to design a simple and versatile double-tuned RF coil that can be used as a transmitter and receiver double-tuned coil (1H and 19F) or as transmitter-only double-tuned coil. Materials and methods: A high-pass eight-element birdcage coil was built for 1H and 19F for a 7 T scanner. PIN diodes and cable traps to block unwanted common mode currents in cables were introduced to confer more flexibility to the coil. S-parameters and quality factor were measured in workbench and signal to noise ratio as well as signal intensity profiles in imaging experiments. Results: Bench measurements show S11 values less than − 33 dB, S21 lower than − 13 dB and quality factors ratio of the order of 1.8 that are in agreement with good performances of a RF coil, as well as values of − 39 dB for 19F and − 30 dB for 1H as good detuning values. Signal intensity profiles prove excellent homogeneity at 1H and 19F. Discussion: We present a simple structure of a double-tuned high-pass birdcage coil tuned to 1H and 19F that shows a great uniformity and sensitivity for 19F.
- Subjects
SIGNAL-to-noise ratio
- Publication
MAGMA: Magnetic Resonance Materials in Physics, Biology & Medicine, 2019, Vol 32, Issue 1, p79
- ISSN
0968-5243
- Publication type
Article
- DOI
10.1007/s10334-018-00733-z