MAGNETIC FIELD CHANGEOVER MAGNETIC RESONANCE VIDEO METHOD AND APPARATUS

摘要

PURPOSE: To increase a signal and noise ratio and to give a special image effect in specified image sequence time in a magnetic resonance image method to be carried out by a generation device of a constant actually uniform static magnetic field B0 supplied to a core on which an image is formed. CONSTITUTION: It is featured to supply a different magnetic field changed over to a time intervalΔt1 central core by a gradient magnetic field coil 16, to select it smaller than a TINMR parameter of the core and to perform NMR pulse sequence including a response RFNMR signal receiving time window to aquire an MRI data as well as more than one RFNMR nutation pulse.