Abstract #0754

Experimental Characterization of Artificial Magnetic Shield for Improvement of Small-Animal Birdcage at 7 T

Ksenia Lezhennikova¹, Redha Abdeddaim², Anna Hurshkainen¹, Alexandre Vignaud³, Marc Dubois^2,4, Konstantin Simovski⁵, Alexander Raaijmakers⁶, Irina Melchakova¹, Stefan Enoch², Pavel Belov¹, and Stanislav Glybovski¹

¹Faculty of Physics and Engineering, ITMO University, St.Petersburg, Russian Federation, ²CNRS, Centrale Marseille, Institut Fresnel, Aix Marseille Univ, Marseille, France, ³CEA-Saclay, DRF/I2BM/Neurospin/UNIR, Université Paris-Saclay, Gif-sur-Yvette Cedex, Paris, France, ⁴CNRS, CRMBM, Aix Marseille Univ, Marseille, France, ⁵Department of Electronics and Nanoengineerin, AALTO University, AALTO, Finland, ⁶Biomedical Engineering, Eindhoven University of Technology, Eindhoven, Netherlands

We proposed a practical realization of an artificial shield for a small-animal birdcage coil for 7T MRI based on a cylindrical miniaturized corrugated structure, which demonstrates the property of a constructive interference inside the coil. The presence of a conventional metallic shield around the birdcage significantly limits the coil efficiency because of the destructive interference between the magnetic field of the shield and the primary field of the coil in the subject. We numerically and experimentally demonstrated that the proposed structure placed around the birdcage could increase the efficiency for relatively small samples due to its in-phase reflection.

This abstract and the presentation materials are available to members only; a login is required.

Join Here