Patent ID: 9523755
Filing Date: 2016-12-20
CPC Classification: A61B,G01R

Claim Text:
1. A method for non-selective excitation of nuclear spin signals in an examination subject in a magnetic resonance (MR) apparatus, comprising: placing an examination subject in an MR data acquisition unit and exposing the examination subject to a basic magnetic field in the MR data acquisition unit; from a computerized control unit, controlling a scan of the examination subject to acquire MR data therefrom by generating and providing a pulse sequence to the MR data acquisition unit that operates the MR data acquisition unit, with the examination subject therein, to radiate a plurality of non-selective radio-frequency (RF) excitation pulses into the examination subject that each has a base frequency that non-selectively excites nuclear spins in the examination subject and thereby produces MR signals resulting from the excited nuclear spins, while simultaneously activating a phase coding magnetic field gradient that spatially encodes the MR signals, and thereby producing a combined magnetic field in said MR data acquisition unit that is a superimposition of said basic magnetic field and said phase coding magnetic field gradient, said combined magnetic field changing during said scan due to the switching of the phase coding magnetic field gradient; and in said computerized control unit, automatically setting the base frequency of each non-selective RF excitation pulse in said pulse sequence dependent on the combined magnetic field that exists at a time in said pulse sequence at which that respective non-selective RF pulse is radiated, due to the phase coding magnetic field gradient that is simultaneously switched at said time.