Patent ID: 8907673

Claim:
A dynamic frequency drift correction method in magnetic resonance imaging, comprising the steps of: operating a magnetic resonance data acquisition device with a gradient echo imaging pulse sequence, that comprises a plurality of RF pulses, to acquire magnetic resonance image data in a basic magnetic field that causes a frequency drift; operating said data acquisition device to acquire a reference one-dimensional navigation signal; operating said magnetic resonance data acquisition device to repeat said gradient echo imaging pulse sequence N times to acquire N images with said pulse sequence, wherein N is a positive integer, and only after repeating said pulse sequence N times acquiring a current one-dimensional navigation signal; in a computerized processor, calculating said frequency drift from said reference one-dimensional navigation signal and said current one-dimensional navigation signal; in said computerized processor, calculating an initial phase of a next of said radio frequency pulses in a next repetition of said gradient echo imaging pulse sequence, that follows said N repetitions, according to said frequency drift; and setting said initial phase of said next of said radio frequency pulses in said next repetition of said gradient echo imaging pulse sequence to acquire further magnetic resonance data with said data acquisition unit.