Development and Optimization of Surface and Volume Radiofrequency Coils Suitable for Fast-Field-Cycling Magnetic Resonance Imaging (FFC-MRI)
| Autor: | Abubakar, Umar, Broch, Lionel, Ugwu, Chukwuka Anthony, Audu, Sadiq Abubakar, Danfulani, Mohammed, Mohammed, Abacha, Miftaudeen, Nike Mutiat |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Radiography and Radiation Sciences; Vol. 32 No. 1 (2018) |
| ISSN: | 2736-1063 2736-1071 |
| Popis: | Objective: To evaluate a modelling and design methodology employed in constructing and optimizing radiofrequency (RF) coils suitable for use with the whole-body fast-field-cycling Magnetic Resonance Imaging (FFC-MRI). It is also aimed at comparing the sensitivity and the signal-to-noise ratio (SNR) of the various types of surface RF coils constructed at the initial and final stages of this research. Methodology: An experimental study carried out at Biomedical MRI Laboratory at University of Aberdeen. Various designs of RF coil were constructed, optimized and tested with network/signal analyser for use with an experimental FFC - MRI scanner, operating at a detection magnetic field of 0.2 T (proton Larmor frequency of 8.5 MHz). The coils comprised circular loop (CL) RF – receive surface coil and a birdcage RF – transmit volume coil. The intrinsic parameters of the CL coils were measured using a search-coil field probe and a network/signal analyser. Results: The CL surface coil constructed with copper wire had resonant frequency of 8.46 MHz and Quality factor (Q – factor) of 47.1 while the resonant frequency of the one constructed with litz wire was 8.54 MHz and Q - factor of 85.4 MHz. The intrinsic parameter of the birdcage volume coil was 8.48 MHz and Q - factor of 102. Conclusion: Bench testing of the coils showed promise as receiver and transmit coils for the FFC-MRI system |
| Databáze: | OpenAIRE |
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