An Adjustable-Length Dipole Using Forced-Current Excitation for 7T MR.

Jiaming Cui,Ivan E. Dimitrov,Sergey Cheshkov,Minyu Gu,Craig Malloy,Steven M. Wright

IEEE Transactions on Biomedical Engineering（2018）

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摘要

Ultrahigh field imaging of the body and the spine is challenging due to the large field-of-view (FOV) required. It is especially difficult for RF transmission due to its requirement on both the length and the depth of the B1+ field. One solution is to use a long dipole to provide continuous current distribution. The drawback is the natural falloff of the B1+ field toward the ends of the dipole, th...

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关键词

Feeds,Radio frequency,Current distribution,Switching circuits,Phantoms,Switches

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