Adaptive Modulation Amplitude in 2D Spectral-Spatial EPR Imaging
T. Czechowskia,b, A. Samolejb, M. Baranowskia,c,d, A. Boś-Liedkea,e, W. Chlewickid,e, J. Jurgab,e and K. Tadyszaka,f
aNanoBioMedical Centre, Adam Mickiewicz University, Poznań, Poland
bLaboratory of EPR Tomography, Poznan University of Technology, Poznań, Poland
c Department of Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland
dFaculty of Electrical Engineering, West Pomeranian University of Technology, Szczecin, Poland
enoviLET, Poznań, Poland
e Department of Medical Physics, Faculty of Physics, Adam Mickiewicz University, Poznań, Poland
fInstitute of Molecular Physics Polish Academy of Sciences, Poznań, Poland
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A study concerning the image quality in Electron Paramagnetic Resonance Imaging (EPRI) in 2D spectral-spatial (2D SSI) experiments is presented. The aim of the measurements is to improve the signal to noise ratio (SNR) of the projections by applying a more consciously selected modulation amplitude parameter. Data is gathered by applying three constant and one adaptive modulation amplitude. The three fixed modulation amplitudes values are leading to undermodulated (0.01 G), partially overmodulated (0.15 G) and fully overmodulated (0.65 G) projections. The study demonstrates the advantages of the adaptive method, which involves selecting different and dependent on cosine function modulation amplitudes for each projection. The study is performed on a phantom containing four tubes of LiPc and TCNQ, characterized by a different peak to peak linewidth and spin concentration.

DOI: 10.12693/APhysPolA.133.710
PACS numbers: 76.30.-v; 42.30.Wb; 75.20.-g; 42.30.Va