Sequential CW-EPR image acquisition with 760-MHz surface coil array |
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Authors: | Enomoto Ayano Hirata Hiroshi |
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Institution: | Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Kita-ku, Sapporo 060-0814, Japan. |
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Abstract: | This paper describes the development of a surface coil array that consists of two inductively coupled surface-coil resonators, for use in continuous-wave electron paramagnetic resonance (CW-EPR) imaging at 760 MHz. To make sequential EPR image acquisition possible, we decoupled the surface coils using PIN-diode switches, to enable the shifting of the resonators resonance frequency by more than 200 MHz. To assess the effectiveness of the surface coil array in CW-EPR imaging, two-dimensional images of a solution of nitroxyl radicals were measured with the developed coil array. Compared to equivalent single coil acquired images, we found the visualized area to be extended approximately 2-fold when using the surface coil array. The ability to visualize larger regions of interest through the use of a surface coil array, may offer great potential in future EPR imaging studies. |
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