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Reduced field-of-view excitation using second-order gradients and spatial-spectral radiofrequency pulses

Content Provider	Scilit
Author	Ma, Chao Xu, Dan King, Kevin F. Liang, Zhi-Pei
Copyright Year	2012
Description	Journal: Magnetic Resonance in Medicine The performance of multidimensional spatially selective radiofrequency (RF) pulses is often limited by their long duration. In this article, high-order, nonlinear gradients are exploited to reduce multidimensional RF pulse length. Specifically, by leveraging the multidimensional spatial dependence of second-order gradients, a two-dimensional spatial-spectral RF pulse is designed to achieve three-dimensional spatial selectivity, i.e., to excite a circular region-of-interest in a thin slice for reduced field-of-view imaging. Compared to conventional methods that use three-dimensional RF pulses and linear gradients, the proposed method requires only two-dimensional RF pulses, and thus can significantly shorten the RF pulses and/or improve excitation accuracy. The proposed method has been validated through Bloch equation simulations and phantom experiments on a commercial 3.0T MRI scanner.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3406253/pdf
Ending Page	508
Page Count	6
Starting Page	503
e-ISSN	15222594
DOI	10.1002/mrm.24259
Journal	Magnetic Resonance in Medicine
Issue Number	2
Volume Number	69
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2012-04-05
Access Restriction	Open
Subject Keyword	Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging Rf Pulse Design Spatial-spectral Rf Pulse Reduced Fov Excitation Second-order Gradient Multidimensional Rf Pulse
Content Type	Text
Resource Type	Article

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