Jrg Felder1, Sandro Romanzetti1, Marcello Alecci2, N. Jon Shah1,3
1Research Centre Jlich, Jlich, Germany; 2Scienze e Tecnologie Biomediche, Universit di L'Aquila,, L'Aquila, Italy; 3Faculty of Medicine, Department of Neurology, RWTH Aachen University, JARA, Aachen, Germany
Parallel excitation frequently employs volume coils consisting of single TEM resonator elements. However, this structure excites a transmit field which is closely confined around the conductors. A geometry known from antenna engineering, the bow-tie, can be employed to spatially expand the transmit field while maintaining the desired properties such as low inductive inter-element coupling and low geometry factor. Arrays consisting of bow-tie elements thus represent a veritable alternative for high field <B>B</B>1 shimming and transmit SENSE applications.