Visualization of inhomogeneous local magnetic field gradient due to susceptibility contrast Journal Article
| Authors: | Cho, H.; Ryu, S.; Ackerman, J. L.; Song, Y. Q. |
| Article Title: | Visualization of inhomogeneous local magnetic field gradient due to susceptibility contrast |
| Abstract: | We visualized inhomogeneous local magnetic field (internal magnetic field) gradients arising from susceptibility contrast between an array of cylindrical glass tubes (solid matrix) and surrounding water (pore fluids) in a uniform applied magnetic field. MRI was performed to determine the spatially resolved decay rates due to diffusion in the internal magnetic field which were proportional to the strength of local gradient. We also spatially resolved the interference pattern of the cross-terms between the internal and the applied field gradient in order to extract the orientation of the internal field gradient. These experimental results were found to be consistent with the theoretical calculations. This work demonstrates a simple yet representative case for visualizing the strength and orientation of the local susceptibility induced magnetic field gradients in porous media. © 2009 Elsevier Inc. All rights reserved. |
| Keywords: | nuclear magnetic resonance imaging; methodology; magnetic resonance imaging; diffusion; algorithms; chemistry; kinetics; algorithm; image quality; background gradient; internal magnetic field; porous media; applied fields; applied magnetic fields; cross-terms; decay rates; glass tubes; induced magnetic fields; interference patterns; internal field gradients; local gradients; local magnetic fields; pore fluids; representative case; solid matrixes; spatially resolved; theoretical calculations; decay (organic); magnetic materials; porous materials; magnetic fields; glass; water; electromagnetic field; porosity; spin labeling; electromagnetic fields; phantoms, imaging; spin labels |
| Journal Title: | Journal of Magnetic Resonance |
| Volume: | 198 |
| Issue: | 1 |
| ISSN: | 1090-7807 |
| Publisher: | Academic Press Inc., Elsevier Science |
| Date Published: | 2009-05-01 |
| Start Page: | 88 |
| End Page: | 93 |
| Language: | English |
| DOI: | 10.1016/j.jmr.2009.01.024 |
| PUBMED: | 19231262 |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | --- - "Cited By (since 1996): 1" - "Export Date: 30 November 2010" - "Source: Scopus" |
