Patent ID: 6404195
Filing Date: 2002-06-11
Classification: G01R

Abstract:
A method comprising a pulse sequence for operating a magnetic resonance tomography apparatus, comprising the steps of:in a first pulse sequence section, emitting a radio frequency pulse having a flip angle of &agr;/2 into a subject; in a second pulse sequence section and a third pulse sequence section, following in succession after said first pulse sequence section, emitting a sequence of radio frequency pulses each having a flip angle a and with a repetition time which is lower than a T1 relaxation time and a T2 relation time of said subject, said subject eventually reaching a steady state equilibrium condition and said third pulse sequence section beginning before said steady state equilibrium condition occurs; in said third pulse sequence section, reading out magnetic resonance signals from said subject with a phase coding, by applying a phase coding gradient, thereby giving each magnetic resonance signal a phase factor, after each radio frequency pulse in said sequence of radio frequency pulses, and resetting said phase coding before a radio frequency pulse next in succession in said sequence of radio frequency pulses; and entering said magnetic resonance signals into a k-space matrix sorted according to phase factors, said k space matrix having a plurality of rows, including central rows, and said phase coding being conducted in said third pulse sequence section so that magnetic resonance signals for said central rows of said k space matrix are acquired at a beginning of said third pulse sequence section.