Patent ID: 7990143
Filing Date: 2011-08-02
Classification: G01R

Abstract:
1. A nuclear magnetic resonance machine comprising means for creating an intense main magnetic field B means for radio-frequency excitation and means for processing radio-frequency signals emitted in response by a body or object placed in said usable interior space, and a first set of solenoidal gradient coils configured for superimposing on the intense magnetic field B the NMR machine including amplifiers configured for simultaneously energizing said solenoidal coils with algebraic sums of currents corresponding to the two gradients, characterized in that the annular cylindrical space includes on an external wall thereof annular coils configured for producing a magnetic field gradient oriented parallel to the direction of the main magnetic field B in that the solenoidal gradient coils incorporated in tubes constitute individual sources of X and Y field gradients in directions perpendicular to the direction of the axis Z, which are sized as forming part of a set of N contiguous individual sources distributed at the perimeter of the annular cylindrical space, where N=4υ+2, υ being an integer greater than or equal to 1, but where two diametrically opposite individual sources corresponding to an axial plane xOz are omitted to retain only 4υ contiguous individual sources distributed in two subsets separated by gaps, each tube being provided with one individual source.