A coax cable dipole antenna with gaps in the shield supports flat current profiles on the outside of the shield. A simulation study is performed to further optimize the design of this flexible so-called ‘coax dipole antenna’. MR thermometry measurements are performed using a single antenna and a homogeneous phantom. The coax dipole antenna causes 18% lower peak heating than a fractionated dipole antenna. An array of eight coax dipole antennas is used to generate T2-weighted images and B1 maps of the prostate of three volunteers, where the coax dipoles achieve the same B1 as an array of fractionated dipoles.
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