Abstract: The invention relates to a device (2, 4) for homogenizing a radiofrequency field, for magnetic resonance imaging, of a given wavelength emitted by a volumetric antenna, comprising at least one continuous metal track (8) with a total length of between 50% and 75% of the wavelength of the radiofrequency field, the metal track comprising two end segments extending in mutually parallel directions and a main portion extending between the two end segments and comprising several local deformations identical to one another and connected to one another in series by at least one at least partially rectilinear connection portion (14) in such a way as to provide the homogenizing device (2, 4) with an electric dipole property, the homogenizing device having a fundamental frequency higher than the frequency corresponding to the wavelength of the radiofrequency field.

Abstract: This magnetic emission device includes an antenna and further includes a device configured to select one of a plurality of predefined portions of the antenna and to connect the selected portion to a current-generating device in order both to cause the current to pass through the selected portion of the antenna so as to radiate a magnetic field, and to prevent the current from passing outside of the selected portion of the antenna.

Abstract: This magnetic emission device includes an antenna and further includes means designed to select one of a plurality of predefined portions of the antenna and to connect the selected portion to a current-generating device in order both to cause the current to pass through the selected portion of the antenna so as to radiate a magnetic field, and to prevent the current from passing outside of the selected portion of the antenna.