𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Additive angle method for fast large-tip-angle RF pulse design in parallel excitation

✍ Scribed by William A. Grissom; Chun-Yu Yip; Steven M. Wright; Jeffrey A. Fessler; Douglas C. Noll

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
906 KB
Volume
59
Category
Article
ISSN
0740-3194

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Current methods for parallel excitation RF pulse design are based on the small‐tip‐angle approximation, which provides a computationally efficient means of pulse calculation. In general, pulses designed with those methods are inaccurate when scaled to produce large‐tip angles, and methods for large‐tipangle pulse design are more computationally demanding. This paper introduces a fast iterative method for large‐tip‐angle parallel pulse design that is formulated as a small number of Bloch equation simulations and fast small‐tip‐angle pulse designs, the results of which add to produce large‐tip‐angle pulses. Simulations and a phantom experiment demonstrate that the method is effective in designingmultidimensional large‐tip‐angle pulses of high excitation accuracy, compared to pulses designed with small‐tip‐angle methods. Magn Reson Med 59:779–787, 2008. © 2008 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

A noniterative method to design large-ti
A noniterative method to design large-tip-angle multidimensional spatially-selective radio frequency pulses for parallel transmission
✍ Dan Xu; Kevin F. King; Yudong Zhu; Graeme C. McKinnon; Zhi-Pei Liang 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 709 KB

## Abstract Recently, theoretical and experimental work has shown that parallel transmission of RF pulses can be used to shorten the duration of multidimensional spatially‐selective pulses and compensate for __B__~1~ field inhomogeneity. However, all the existing noniterative methods can design onl

Spatial domain method for the design of
Spatial domain method for the design of RF pulses in multicoil parallel excitation
✍ William Grissom; Chun-yu Yip; Zhenghui Zhang; V. Andrew Stenger; Jeffrey A. Fess 📂 Article 📅 2006 🏛 John Wiley and Sons 🌐 English ⚖ 836 KB

## Abstract Parallel excitation has been introduced as a means of accelerating multidimensional, spatially‐selective excitation using multiple transmit coils, each driven by a unique RF pulse. Previous approaches to RF pulse design in parallel excitation were either formulated in the frequency doma