title: Sequential CW-EPR image acquisition with 760-MHz surface coil array.
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.
authors.affiliation: Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Kita-ku, Sapporo 060-0814, Japan.
authors.forename: Ayano
authors.initials: A
authors.lastname: Enomoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hirata
mesh_terms: D004574:Electromagnetic Fields; D004578:Electron Spin Resonance Spectroscopy; D004867:Equipment Design; D005609:Free Radicals; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D019047:Phantoms, Imaging
chemical_list: D005609:Free Radicals