期刊
CONCEPTS IN MAGNETIC RESONANCE PART A
卷 21A, 期 1, 页码 37-49出版社
JOHN WILEY & SONS INC
DOI: 10.1002/cmr.a.20004
关键词
magnetization transfer contrast; steady state; human brain
A general framework for magnetization transfer (MT) of a two-pool system with linear exchange for arbitrary saturation by periodic radio-frequency pulses was derived. It is based on a novel parameterization adapted to the time evolution of saturation recovery. The conditions in tissue permit a description in analogy to partial saturation of a homogeneous liquid. In this approximation, the direct saturation of bulk water is amplified by MT. Rapid transfer equilibrates the saturation of the pools in the early phase of free evolution. This kinetic pre-equilibrium relaxes slowly with a common relaxation rate. (C) 2004 Wiley Periodicals, Inc.
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