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Conference Paper

Safety excitation efficiency of MRI 300MHz dualrow transmit arrays

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Kozlov,  Mikhail
Department Neurophysics (Weiskopf), MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Möller,  Harald E.
Methods and Development Unit Nuclear Magnetic Resonance, MPI for Human Cognitive and Brain Sciences, Max Planck Society;

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Citation

Kozlov, M., & Möller, H. E. (2015). Safety excitation efficiency of MRI 300MHz dualrow transmit arrays. In 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting (pp. 1352-1353). Piscataway: IEEE. doi:10.1109/APS.2015.7305065.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-41F6-3
Abstract
We investigated how performance trade-off depends on dual-row transmit array geometry, position of a head inside the array and array tuning condition. A clear winner was not found. For overlapped arrays, different tuning conditions resulted in larger peak-to-peak variation for CP excitation, but B1+v decrease was as a bit less for excitations that minimized IB1+v as compared with nonoverlapped arrays. For non-overlapped array the safety excitation efficiency was better if the distance between the crown of the head and the end of the array was small.