Bobo Hu1,
Sedig Farhat2, Paul Glover2
1Sir Peter Mansfield Magnetic Resonance
Centre ,
The
RF field inhomogeneity in the human brain imaging utilizing the travelling
wave technique is a fundamental obstacle of its clinical implementation. This
work proposes a horn antenna type of structure to improve the coupling of the
travelling wave to the head and also enhance the field homogeneity,
especially at the upper cerebrum area. Both the simulated B1 field map and
Poynting vector plot shows the field homogeneity has been improved and more
power flows into the head. The hot-spots at top of the cerebrum and forehead
area are greatly reduced. A comparison of its performances against patch
antenna and patch antenna with a match load were studied by using the
numerical simulation (xFDTD, Remcom. Inc, PA).
Keywords