The magnet system for rapid scan electron paramagnetic resonance imaging and spectroscopy
Czechowski T.1, Chlewicki W.1,2, Baranowski M.1,3, Jurga K.1, Szczesniak E.1, Szostak M.1, Malinowski P.1, Kedzia P.1, Szczepanik P.1, Szulc P.1, Wosinski S.1, Prukala W.1,4, Jurga J.1
- 1Laboratory of EPR Tomography, Institute of Materials Technology, Poznan University of Technology, Poznan 60-965, Poland
- 2Department of Electrical and Computer Engineering, West Pomeranian University of Technology, Szczecin 70-310, Poland
- 3Faculty of Physics, Adam Mickiewicz University, Poznan 61-614, Poland
- 4Department of Organometalic Chemistry, Adam Mickiewicz University, Poznan 60-780, Poland
Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering, 43 B (1), pp.22-31, 2013
DOI:: 10.1002/cmr.b.21228
Abstract:
The magnet and gradient systems suitable for electron paramagnetic resonance imaging experiments at RF range are presented. The air-core magnet based on the Helmholtz design in the article has a unique conical shape. A comprehensive study regarding the coils adjustment providing for the maximum field homogeneity is given. The z gradient is a four-coil system (seventh order), the transverse gradients are Golay coils (fifth order), and the scan system is the Helmholtz coil (fourth order). The magnet generates continuously a field of 37 mT (370 G), and the orthogonal gradient coils are designed to yield 100 mT/m (10 G/cm). The experimental tests have shown that the field generated is homogeneous to ±10 ppm in the 6 × 6 × 3 cm3 region (x/y/z), which is our field of interest, and to ±50 ppm in the 8 × 8 × 4 cm3 region (x/y/z). The system has the potential to monitor temporal changes of oxygen concentration in biological samples. © 2012 Wiley Periodicals, Inc.
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