Patent ID: 6297633
Filing Date: 2001-10-02
Classification: G01R

Abstract:
A magnetic resonance tomography system comprising a basic field magnet that generates a basic magnetic field B.sub.0 having a principal component B.sub.0z in a z-direction of a rectangular coordinate system, gradient coils in the basic field magnet which generate time-varying field gradients G.sub.u in a direction u, an RF transmission and reception coil, and a drive and evaluation circuit for operating said basic field magnet, said gradient coils and said RF transmission and reception coil to excite nuclear spins in a selection direction in a scan volume and to read out and evaluate a magnetic resonance signal, arising from said nuclear spins, in a readout direction, said basic field magnet being designed independently of an absolute homogeneity of said basic magnetic field, to produce said basic magnetic field with a field gradient dB.sub.0z /du in the a scan volume that is lower in the selection direction and in the readout direction than the field gradient G.sub.u activated in these respective directions with the gradient coils.