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Proceedings Paper

Dynamic susceptometry technique for brain mapping
Author(s): Soo Yeol Lee; Jong Soo Yang; Sang Chul Lee; Jae Yong Han; In Kon Chun; Min Hyoung Cho
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Paper Abstract

We have analyzed magnetic field perturbations caused by local magnetic susceptibility changes at a brain when the brain is immersed in the main magnetic field of an MRI system. When a local region of brain tissue is activated, the effective magnetic susceptibility of the region changes due to the blood volume and blood oxygenation level changes at the activated region. This local susceptibility change will, then, perturb the main magnetic field of the MRI system. After estimating the effective magnetic susceptibility change at an activated region, we have analyzed the perturbation field through theoretical and numerical calculations. We have found that the magnetic field perturbation due to the local susceptibility change is as big as can be measured by SQUID devices. We expect that the perturbation field can be used for brain function studies in conjunction with fMRI.

Paper Details

Date Published: 5 June 2003
PDF: 8 pages
Proc. SPIE 5030, Medical Imaging 2003: Physics of Medical Imaging, (5 June 2003); doi: 10.1117/12.480004
Show Author Affiliations
Soo Yeol Lee, Kyung Hee Univ. (South Korea)
Jong Soo Yang, Kyung Hee Univ. (South Korea)
Sang Chul Lee, Kyung Hee Univ. (South Korea)
Jae Yong Han, Kyung Hee Univ. (South Korea)
In Kon Chun, Kyung Hee Univ. (South Korea)
Min Hyoung Cho, Kyung Hee Univ. (South Korea)

Published in SPIE Proceedings Vol. 5030:
Medical Imaging 2003: Physics of Medical Imaging
Martin J. Yaffe; Larry E. Antonuk, Editor(s)

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