Irena Zivkovic1, Christian Mirkes1,2, and Klaus Scheffler1,2
1High Field MRI Department, Max Planck Institute for Biological Cybernetics, Tuebingen, Germany, 2Dept. for Biomedical Magnetic Resonance, University of Tuebingen, Tuebingen, Germany
It is a big challenge to produce as
homogeneous as possible B0 static magnetic field. Susceptibility differences
between the tissue and air introduce inhomogeneities especially pronounced at
high fields. Recently proposed close fitting array of circular loops provide
improvement in B0 shimming. Based on the same concept, we proposed coil
elements with irregular shape. The shape of the coils was designed by using of
genetic algorithm. Theoretical investigation showed that performance of the 16
channel array of irregular elements was comparable or better than 48 channel
array consisting loop elements.
