We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Velocity-selective excitation: Principles and applications.
- Authors
Zungho Zun; Taehoon Shin
- 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 sincshaped 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.
- Subjects
SPIN labels; SPIN excitations; MAGNETIC fields; ANGIOGRAPHY; CLINICAL medicine
- Publication
NMR in Biomedicine, 2023, Vol 36, Issue 2, p1
- ISSN
0952-3480
- Publication type
Article
- DOI
10.1002/nbm.4820