• Eleanor F Cox and Penny A Gowland.
• Sir Peter Mansfield Magnetic Resonance Centre, School of Physics and Astronomy, University of Nottingham, United Kingdom. eleanor.cox@nottingham.ac.uk
• Magn Reson Med. 2010 Nov 1; 64 (5): 1440-5.

AbstractMeasuring T(2) at 7.0 T is not trivial due to RF inhomogeneity effects, however, gradient echo sampling of a spin echo is insensitive to RF pulse errors, does not suffer from significant distortions, and allows T'(2) and T(2) to be estimated simultaneously. Gradient echo sampling of a spin echo results are relatively sensitive to noise and therefore fitting methods and timing parameters were optimized: a weighted linear fit reduced the errors in T(2) compared to a nonlinear fit, the optimum spin echo time was approximately equal to the expected T(2) and decreasing the number of gradient echoes minimized the error of the estimated T(2). T(2), T'(2), and T*(2) decreased with field strength in frontal gray matter, occipital gray matter, and white matter, with T(2) having a linear dependence (frontal gray matter: 87, 76, 47 ms, occipital gray matter: 80, 68, 46 ms and white matter: 80, 71, 47 ms at 1.5, 3.0 and 7.0 T, respectively).Copyright © 2010 Wiley-Liss, Inc.

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