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  • Title: Spin echo spectroscopic electron paramagnetic resonance imaging.
    Author: Mailer C, Sundramoorthy SV, Pelizzari CA, Halpern HJ.
    Journal: Magn Reson Med; 2006 Apr; 55(4):904-12. PubMed ID: 16526015.
    Abstract:
    The use of spin echoes to obtain spectroscopic EPR images (spectral-spatial images) at 250 MHz is described. The advantages of spin echoes-larger signals than the free induction decay, better phase characteristics for Fourier transformation, and decay shapes undistorted by instrumental dead time-are clearly shown. An advantage is gained from using a crossed loop resonator that isolates the 250-W pump power by greater than 50 dB from the observer arm preamplifiers. The echo decay rates can be used to determine the oxygen content in solutions containing 1 mM trityl concentrations. Two- and three-dimensional images of oxygen concentration are presented.
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