Presented at the SMRM Workshop on Contrast Enhanced Magnetic Resonance, Napa, CA, May 23–25, 1991.
The magnetic properties of some materials affecting MR images†
Article first published online: 18 NOV 2005
Copyright © 1991 Wiley-Liss, Inc., A Wiley Company
Magnetic Resonance in Medicine
Volume 22, Issue 2, pages 204–208, December 1991
How to Cite
Josephson, L., Bigler, J. and White, D. (1991), The magnetic properties of some materials affecting MR images. Magn Reson Med, 22: 204–208. doi: 10.1002/mrm.1910220208
- Issue published online: 18 NOV 2005
- Article first published online: 18 NOV 2005
- Manuscript Received: 18 JUL 1991
We have compared the magnetic properties of various types of materials known to affect MR images. The materials compared were: (i) MR contrast agents based on chelates of paramagnetic metals (Gd-DTPA, Dy-DTPA); (ii) biological forms of iron (horse spleen ferritin and deoxyhemoglobin); and (iii) a superparamagnetic iron oxide (AMI-25). The properties compared were the magnetic susceptibility and the magnetization. The magnetization and susceptibility of superparamagnetic AMI-25 are far larger than that of ferritin or low molecular weight, paramagnetic chelates. Superparamagnetic iron oxide colloids, like AMI-25, are a uniquely powerful class of magnetic materials. © 1991 Academic Press, Inc.