期刊
MAGNETIC RESONANCE IN MEDICINE
卷 45, 期 6, 页码 1095-1102出版社
JOHN WILEY & SONS INC
DOI: 10.1002/mrm.1144
关键词
adiabatic pulse; pulse sequence; volume localization; outer-volume suppression; frequency modulation
资金
- NCI NIH HHS [CA64338] Funding Source: Medline
- NCRR NIH HHS [RR08079] Funding Source: Medline
A technique is described for performing frequency-selective signal suppression with a high degree of tolerance to RF field inhomogeneity. The method is called B-1-insensitive train to obliterate signal (BISTRO), BISTRO consists of multiple amplitude- and frequency-modulated (FM) pulses interleaved with spoiler gradients, BISTRO was developed for the purpose of accomplishing band-selective signal removal, as in water suppression and outer-volume suppression (OVS), in applications requiring the use of an inhomogeneous RF transmitter, such as a surface coil, In the present work, Bloch simulations were used to illustrate the principles and theoretical performance of BISTRO, Its performance for OVS was evaluated experimentally using MRI and spectroscopic imaging of phantoms and in vivo animal and human brain. By using FM pulses featuring offset-independent adiabaticity, BISTRO permitted high-quality, broadband suppression with one (or two) discrete borders demarcating the edge(s) of the suppression band, Simulations and experiments demonstrated the ability to operate BISTRO with reasonably attainable peak RF power levels and with average RF energy deposition similar to other multipulse OVS techniques. (C) 2001 Wiley-Liss, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据