title: Improvement of temporal resolution for three-dimensional continuous-wave electron paramagnetic resonance imaging.
abstract: This paper describes improved temporal resolution for three-dimensional (3D) continuous-wave electron paramagnetic resonance (EPR) imaging. To improve temporal resolution, the duration of magnetic filed scanning that is used to obtain an EPR spectrum for each projection was reduced to 40 ms. The Helmholtz coil pair for field scanning was driven by triangular waves. The uniform distribution of projections was also used to reduce the number of projections for 3D image reconstruction. The reduction reaction of 4-hydroxy-2,2,6,6-tetramethyl-piperidinooxy with ascorbic acid was visualized by improved 3D EPR imaging techniques with a temporal resolution of 5.8 s.
authors.affiliation: Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Sapporo 060-0814, Japan.
authors.forename: Hideo
authors.initials: H
authors.lastname: Sato-Akaba
authors.forename: Hirotada
authors.initials: H
authors.lastname: Fujii
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Hirata
mesh_terms: D000465:Algorithms; D001205:Ascorbic Acid / Q000737:chemistry; D003497:Cyclic N-Oxides / Q000737:chemistry; D003952:Diagnostic Imaging / Q000379:methods*; D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D004867:Equipment Design; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008280:Magnetics; D019047:Phantoms, Imaging; D010825:Physics / Q000379:methods; D013113:Spin Labels; D013997:Time Factors
chemical_list: D003497:Cyclic N-Oxides; D013113:Spin Labels; D001205:Ascorbic Acid; C001803:tempol