Patent ID: 8947087
Filing Date: 2015-02-03
Classification: G01R

Abstract:
1. A magnetic resonance apparatus comprising: a basic field magnet comprising at least one magnetic coil pair comprised of at least a first magnetic coil and a second magnetic coil spaced from each other with an examination region therebetween; a control unit configured to operate said basic field magnet by applying a first current, having a first amplitude, to said first magnetic coil and applying a second current, having a second amplitude that is different from said first amplitude, to said second magnetic coil, and thereby causing said first magnetic coil to produce a first magnetic field and said second magnetic coil to produce a second magnetic field that differs from said first magnetic field and that is superimposed on said first magnetic field to produce a superimposed field comprising a basic magnetic field that is homogenous in at least a portion of said examination region, and said superimposed field also exhibiting a magnetic field gradient in said examination region; and a radio-frequency (RF) transmission and reception system that radiates RF energy into an examination subject situated in said examination region that deflects nuclear spins in said examination subject out of an alignment produced in said homogenous portion of said basic magnetic field, in order to cause said nuclear spins to emit magnetic resonance signals that are spatially encoded exclusively by said gradient of said superimposed field.