Title :
3D selective pulse design with variable spoke trajectories for parallel excitation
Author :
Feng, Shuo ; Ji, Jim
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX, USA
fDate :
Aug. 30 2011-Sept. 3 2011
Abstract :
Three dimensional spatial selective RF pulse of practical length has been demonstrated using parallel transmission technique in Magnetic Resonance Imaging. Currently, spoke trajectory, which is a set of parallel k-space straight lines, is widely used for 3-D slab excitation to achieve sharp slice profile and a uniform or smoothly varying in-plane profile. The better control of in-plane profile mainly comes from an increased number of spokes. In this paper, we proposed three types of modified spoke trajectories for the 3-D tailored RF pulse design which traverse k-space more efficiently. Simulations are used to characterize the proposed trajectories.
Keywords :
biomedical MRI; radiofrequency imaging; 3-D slab excitation; 3D selective pulse design; magnetic resonance imaging; parallel excitation; parallel k-space straight lines; parallel transmission technique; sharp slice profile; three dimensional spatial selective RF pulse; variable spoke trajectories; Biomedical imaging; Coils; Magnetic resonance; Magnetic resonance imaging; Radio frequency; Three dimensional displays; Trajectory; Magnetic Resonance Imaging; Models, Theoretical;
Conference_Titel :
Engineering in Medicine and Biology Society, EMBC, 2011 Annual International Conference of the IEEE
Conference_Location :
Boston, MA
Print_ISBN :
978-1-4244-4121-1
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2011.6090786