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Velocity-selective excitation: Principles and applications

Title
Velocity-selective excitation: Principles and applications
Authors
Zun Z.Shin T.
Ewha Authors
신태훈
SCOPUS Author ID
신태훈scopus
Issue Date
2023
Journal Title
NMR in Biomedicine
ISSN
0952-3480JCR Link
Citation
NMR in Biomedicine vol. 36, no. 2
Keywords
angiographyarterial spin labelingexcitation k-spaceRF designvelocity-selective
Publisher
John Wiley and Sons Ltd
Indexed
SCIE; SCOPUS scopus
Document Type
Review
Abstract
Velocity-selective (VS) excitation is a relatively new type of excitation that can be useful for generating image contrast based on spin's motion. This review aims to explain the principles of VS excitation and their utilization for clinical applications. We first review the generalized excitation k-space formalism, which reveals a Fourier relationship between sequence parameters and excitation profiles for spins with arbitrary spatial location, off-resonance, and velocity. Based on the k-space framework, we analyze practical VS excitation pulse sequences that yield sinusoidal or sinc-shaped velocity profiles. Then we demonstrate how these two types of VS excitation can be used as magnetization preparation for clinical applications, including saturation- or inversion-based arterial spin labeling and black- or bright-blood angiography. We also discuss practical considerations and issues for each application, including the determination of design parameters and the effects of MR system errors, such as magnetic field offsets and eddy currents. © 2022 John Wiley & Sons Ltd.
DOI
10.1002/nbm.4820
Appears in Collections:
공과대학 > 휴먼기계바이오공학과 > Journal papers
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