✦ LIBER ✦

Joint design of trajectory and RF pulses for parallel excitation

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

Publisher: John Wiley and Sons
Year: 2007
Tongue: English
Weight: 489 KB
Volume: 58
Category: Article
ISSN: 0740-3194
DOI: 10.1002/mrm.21262

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

We propose an alternating optimization framework for the joint design of excitation k‐space trajectory and RF pulses for small‐tip‐angle parallel excitation. Using Bloch simulations, we show that compared with conventional designs with predetermined trajectories, joint designs can often excite target patterns with improved accuracy and reduced total integrated pulse power, particularly at high reduction factors. These benefits come at a modest increase in computational time. Magn Reson Med 58:598–604, 2007. © 2007 Wiley‐Liss, Inc.

📜 SIMILAR VOLUMES

Design of symmetric-sweep spectral-spati

Design of symmetric-sweep spectral-spatial RF pulses for spectral editing

✍ Charles H. Cunningham; Daniel B. Vigneron; Albert P. Chen; Duan Xu; Ralph E. Hur 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 421 KB

Spectral-spatial RF (SSRF) pulses allow simultaneous selection in both frequency and spatial domains. These pulses are particularly important for clinical and research MR spectroscopy (MRS) applications for suppression of large water and lipid resonances. Also, the high bandwidth of the subpulses (5

Comparison of three algorithms for solvi

Comparison of three algorithms for solving linearized systems of parallel excitation RF waveform design equations: Experiments on an eight-channel system at 3 Tesla

✍ Adam C. Zelinski; Lawrence L. Wald; Kawin Setsompop; Vijayanand Alagappan; Borja 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 577 KB

The design of excitation pulses for spin

The design of excitation pulses for spin systems using optimal control theory: With application to NMR spectroscopy

✍ Naum I. Gershenzon; David F. Miller; Thomas E. Skinner 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 176 KB

Extending slice coverage for breathhold

Extending slice coverage for breathhold fat-suppressed T2-weighted fast spin-echo of the liver at 3.0T: Application of variable-rate selective-excitation (VERSE) RF pulses

✍ Indra C. van den Bos; Shahid M. Hussain; Gabriel P. Krestin; Piotr A. Wielopolsk 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 242 KB

## Abstract ## Purpose To determine the benefits of variable‐rate selective‐excitation (VERSE) radio frequency (RF) pulses for increased slice coverage in breathhold (BH) fat‐suppressed T2‐weighted fast spin‐echo (FS‐T2W‐FSE) liver imaging at 3.0T. ## Materials and Methods A total of 12 healthy