Two-dimensional spectral-spatial EPR imaging with the rapid scan and modulated magnetic field gradient

T Czechowski; W Chlewicki; M Baranowski; K Jurga; P Szczepanik; P Szulc; P Kedzia; M Szostak; P Malinowski; S Wosinski; W Prukala; J Jurga

doi:10.1016/j.jmr.2014.03.001

Two-dimensional spectral-spatial EPR imaging with the rapid scan and modulated magnetic field gradient

J Magn Reson. 2014 Jun:243:1-7. doi: 10.1016/j.jmr.2014.03.001. Epub 2014 Mar 20.

Authors

T Czechowski¹, W Chlewicki², M Baranowski³, K Jurga⁴, P Szczepanik⁴, P Szulc⁴, P Kedzia⁴, M Szostak⁴, P Malinowski⁴, S Wosinski⁴, W Prukala⁵, J Jurga⁴

Affiliations

¹ Laboratory of EPR Tomography, Poznan University of Technology, 60-965 Poznan, Poland. Electronic address: [email protected].
² Laboratory of EPR Tomography, Poznan University of Technology, 60-965 Poznan, Poland; Faculty of Electrical Engineering, West Pomeranian University of Technology, 70-310 Szczecin, Poland.
³ Laboratory of EPR Tomography, Poznan University of Technology, 60-965 Poznan, Poland; Department of Physics, Adam Mickiewicz University, 61-614 Poznan, Poland.
⁴ Laboratory of EPR Tomography, Poznan University of Technology, 60-965 Poznan, Poland.
⁵ Laboratory of EPR Tomography, Poznan University of Technology, 60-965 Poznan, Poland; Department of Organometallic Chemistry, Adam Mickiewicz University, 60-780 Poznan, Poland.

PMID: 24705409
DOI: 10.1016/j.jmr.2014.03.001

Abstract

A new method for fast spectral-spatial electron paramagnetic resonance imaging (EPRI) is presented. To reduce the time of projections acquisition we propose to combine rapid scan of Zeeman magnetic field using high frequency sinusoidal modulation with simultaneously applied magnetic field gradients, whose amplitude is modulated at low frequency. The correctness of the method is confirmed by studies carried out on a phantom consisting of two LiPc samples. The spectral-spatial images from the acquired data are reconstructed using iterative algorithms. The proposed method allows to acquire the spectral-spatial image with 800 projections at 200ms.

Keywords: EPR imaging; Modulated gradient; Rapid scan; Spectral–spatial imaging.

Publication types

Research Support, Non-U.S. Gov't