Patent ID: 9709643
Date: 2017-07-18
CPC Classifications: G01R

Claim:
1. A method for generation of a radio-frequency (RF) pulse using a magnetic resonance imaging device for excitation of nuclear spins in a predetermined measuring volume for magnetic resonance imaging, wherein the magnetic resonance imaging device comprises a supply unit and a magnet unit, and wherein the supply unit comprises a controller and an RF pulse generating unit, the method comprising: determining, with the controller, a spatial variation of a magnetic field strength of a magnetic field in the predetermined measuring volume; defining, with the controller, a spectral frequency distribution of the RF pulse under a boundary condition of a substantially minimum energy content of the RF pulse, wherein the spectral frequency distribution only encompasses a previously determined frequency range of the spatial variation of the magnetic field strength of the magnetic field in the predetermined measuring volume, and wherein the RF pulse with the spectral frequency distribution is configured to excite nuclear spins in a specimen in the magnetic field in the predetermined measuring volume at a predetermined flip angle with a predetermined variance of the flip angle; generating, with the RF pulse generating unit, the RF pulse with the defined spectral frequency distribution; and imaging, with the magnetic resonance imaging device, the specimen using the generated RF pulse.