多层射频电流密度成像。
Multislice radio-frequency current density imaging.
作者信息
Wang Dinghui, DeMonte Tim P, Ma Weijing, Joy Michael L G, Nachman Adrian I
机构信息
Department of Electrical and Computer Engineeringand Institute of Biomaterial and Biomedical Engineering, University of Toronto,Toronto, ON, M5S 3G9 Canada.
出版信息
IEEE Trans Med Imaging. 2009 Jul;28(7):1083-92. doi: 10.1109/TMI.2008.2012161. Epub 2009 Jan 13.
Radio-frequency current density imaging (RF-CDI) is an imaging technique that noninvasively measures current density distribution at the Larmor frequency utilizing magnetic resonance imaging (MRI). Previously implemented RF-CDI techniques were only able to image a single slice transverse to the static magnetic field B(0) . This paper describes the first realization of a multislice RF-CDI sequence on a 1.5 T clinical imager. Multislice RF current density images have been reconstructed for two phantoms. The influence of MRI random noise on the sensitivity of the multislice RF-CDI measurement has also been studied by theoretical analysis, simulation and phantom experiments.
射频电流密度成像（RF-CDI）是一种利用磁共振成像（MRI）在拉莫尔频率下非侵入性测量电流密度分布的成像技术。先前实现的RF-CDI技术仅能够对垂直于静磁场B(0) 的单个切片进行成像。本文描述了在1.5T临床成像仪上首次实现的多层RF-CDI序列。已针对两个体模重建了多层RF电流密度图像。还通过理论分析、模拟和体模实验研究了MRI随机噪声对多层RF-CDI测量灵敏度的影响。
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