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：

澳大利亚研究理事会; 英国医学研究理事会;

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.

引用

页数：9

共 29 条

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