Apparatus for the examination of a body by resonance magnetic resonance by methods slow and fast, in particular for the examination of the surface layer of this body, a device for create a gradient of the magnetic field for such an apparatus, and the application is the image of the skin of the human body.

摘要

The apparatus 1 comprises: means 3 for create a main static magnetic field h0 homogenous oriented along a direction oz determined, static field in which is placed the body 2 has to investigate; the devices for create of the magnetic field gradients in a volume to be examined of the body along three directions in space; means of a radio frequency excitation e; and means for detection of resonance r of the magnetic resonance signals produced by the body has to investigate. One dx of the devices for create the gradients is constituted by a unilateral system in which the means 6 for create the gradient of the magnetic field, in a direction ox of the space, are fully located on a same side of a surface "open" p, while the body has to investigate 2 is situated at the level of this surface p counter is that, or are the means 6, which are adapted to create a gradient that is transverse with respect to the oz direction of the main field, the dimension of the surface or is the body 2 has to investigate. Such an apparatus dx is particularly well to the nmr imaging of human skin.