Abstract #3663

Local SAR increase in the human head induced by high-permittivity pads at the sodium (23Na) resonance frequency at 7 Tesla

Thomas M. Fiedler¹, Mark E. Ladd^1,2, and Andreas K. Bitz¹

¹Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany, ²Erwin L. Hahn Institute for Magnetic Resonance Imaging, University Duisburg-Essen, Essen, Germany

It has been shown that specific configurations of high-permittivity pads can lead to an increase of local SAR. So far, the effects of high-permittivity pads on RF fields have been investigated only for ¹H imaging at 7 Tesla. For X-nuclei imaging typically dual-tuned coils are applied. In this work, we investigate the effect of high-permittivity pads, typically utilized to optimize RF fields for ¹H imaging, for ²³Na imaging at 7T. RF simulations were performed for two body models to determine under which conditions SAR elevations are likely to occur or can be avoided.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.