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A multicenter measurement of magnetization transfer ratio in normal white matter
I Berry1, G J Barker, F Barkhof
1Service de Neuroradiologie, University Hospitals, Toulouse, France.
Journal of Magnetic Resonance Imaging : JMRI
|April 9, 1999
Abstract:
To assess the importance of intercenter variations when measuring magnetization transfer ratio (MTR) in the brain, six European centers measured MTR in normal white matter. MTR ranged from 9 to 51 percent units (25 sequences). The effective flip angle of the saturating pulse divided by the pulse repetition time (ENRsat degrees/msec) was a good predictor of MTR (MTR = 3.25 ENRsat).