用于组织对比度增强的脉冲磁化传递与连续波照射对比

Pulsed magnetization transfer versus continuous wave irradiation for tissue contrast enhancement.

作者信息

Schneider E, Prost R W, Glover G H

机构信息

Applied Science Laboratory, GE Medical Systems, Waukesha, WI 53188.

出版信息

J Magn Reson Imaging. 1993 Mar-Apr;3(2):417-23. doi: 10.1002/jmri.1880030218.

DOI:10.1002/jmri.1880030218

PMID:8448405

Abstract

Pulsed magnetization transfer and continuous wave irradiation techniques are analyzed and compared for saturation efficiency and radio-frequency (RF) power requirements at 1.5 and 0.5 T. Binomial RF pulses transmitted on resonance are a more power-efficient method of exciting saturation transfer and are easily implemented with any pulse sequence. Binomial pulses selectively excite all short T2 species and behave as 0 degrees pulses for on-resonance, long T2 species.

摘要

对脉冲磁化传递和连续波照射技术进行了分析和比较，以研究其在1.5T和0.5T场强下的饱和效率和射频（RF）功率需求。在共振状态下发射的二项式RF脉冲是激发饱和传递的一种更节能的方法，并且可以很容易地应用于任何脉冲序列中。二项式脉冲能选择性地激发所有短T2物质，而对于共振状态下的长T2物质，其作用相当于0°脉冲。