Radio frequency field emission system for magnetic resonance imaging

A system for emitting a radio frequency field for a magnetic resonance imaging device, said radio frequency field comprising a spectrum centered on a given wavelength, said system comprising:

• a volumetric antennaconfigured to emit said radio frequency field, said volumetric antennabeing configured to be placed around a partof a body to be imaged;
• and
• a devicefor homogenizing the radio frequency field, configured to be arranged between said volumetric antenna and said part of the body to be imaged;
• wherein the homogenizing device comprises:
• at least one first continuous metal trackwith an overall length of approximately 0.5 to approximately 1.5 times said wavelength of the radio frequency field;
• wherein:
• said first metal trackoccupies a surface with a largest dimension ranging between approximately 5% and approximately 15% of said wavelength of the radio frequency field;
• wherein said first metal trackis arranged in a pattern comprising a plane of symmetry that is normal to the electrical component of the radio frequency field emitted by the volumetric antenna, so as to provide the homogenizing device with an electric dipole property comprising a natural frequency strictly higher than the frequency corresponding to said wavelength of the radio frequency field.