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MRI pulse sequences that use regularly spaced trains of rapidly applied excitation pulses (every few milliseconds) are known as 'steady-state' sequences. Under these conditions, the magnetization evolves into a steady state that depends on tissue parameters such as T 1 , T 2 and diffusion, as well as sequence parameters such as repetition time and flip angle. These sequences have attractive properties including high efficiency (in terms of signal-to-noise ratio) and flexible image contrast; they also create unique challenges due to the need to maintain the magnetization in the steady state and their complicated signal dependence. This article describes the primary types of steady-state sequences and their application to brain imaging. © 2011 Future Medicine Ltd.

Original publication

DOI

10.2217/iim.10.66

Type

Journal article

Journal

Imaging in Medicine

Publication Date

01/02/2011

Volume

3

Pages

93 - 105