3D-Spatial encoding with permanent magnets for ultra-low field magnetic resonance imaging

被引：9
|
作者：
Vogel, Michael W. [1 ]
Guridi, Ruben Pellicer [1 ]
Su, Jiasheng [1 ]
Vegh, Viktor [1 ]
Reutens, David C. [1 ]
机构：
[1] Univ Queensland, Ctr Adv Imaging, Brisbane, Qld, Australia
来源：
SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期
基金：
英国医学研究理事会; 澳大利亚研究理事会;
关键词：
MRI;
D O I：
10.1038/s41598-018-37953-1
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
We describe with a theoretical and numerical analysis the use of small permanent magnets moving along prescribed helical paths for 3D spatial encoding and imaging without sample adjustment in ultra-low field magnetic resonance imaging (ULF-MRI). With our developed method the optimal magnet path and orientation for a given encoding magnet number and instrument architecture can be determined. As a proof-of-concept, we studied simple helical magnet paths and lengths for one and two encoding magnets to evaluate the imaging efficiency for a mechanically operated ULF-MRI instrument with permanent magnets. We demonstrate that a single encoding magnet moving around the sample in a single revolution suffices for the generation of a 3D image by back projection.
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页数：9
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