Characterization of EPR Spin-Echo Data for Accelerated Oximetry

Frank Golub¹, Lee C. Potter¹, Rizwan Ahmad¹

The current standard for evaluating the T2 decay constant in pulsed EPR oximetry employs peak-picking of spin echoes. This method is inefficient, because it only uses a small subset of the available echo data. In this work, we characterize a sequence of measured spin echoes using either a rank-one matrix or a train of parametric functions. Simulation results indicate that the proposed methods can significantly reduce the error variance in the estimation of T2 and hence the data acquisition time for EPR oximetry.