Open AccessUltra-low field magnetic resonance imaging based on high Tc dc-SQUID
Author(s) -
Ning Wang,
Yirong Jin,
Hui Deng,
Wu Yu-Lin,
Zheng Guo-Lin,
Li Shao,
Ye Tian,
Yang Ren,
Yingfei Chen,
Dewen Zheng
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.213302
Subject(s) - imaging phantom , fourier transform , magnetic resonance imaging , electromagnetic coil , nuclear magnetic resonance , projection (relational algebra) , materials science , squid , physics , k space , iterative reconstruction , optics , computer science , computer vision , medicine , radiology , algorithm , quantum mechanics , biology , ecology
A systematic research on ultra-low field magnetic resonance imaging (MRI) is conducted based on high-Tc dc-SQUID senor. The coil system is first updated to reach the requirements of MRI experiment. After that one-dimensional and two-dimensional imaging are performed and images consistent well with original phantoms are obtained successfully. Two different methods are used to rebuild the image: direct back projection and Fourier transform reconstruction. Both of them can obtain the profile of water phantom. A comparative discussion between these methods is proposed: the Fourier transform method has a better profile, while the direct back projection has a better signal-to-noise ratio. Imaging of biological sample such as green pepper and celery is also performed, and it is consistent well with the physical object.