SUPER HIGH SPEED MULTIPLE SECTION WHOLE-BODY MRI USING GRADIENT AND SPIN ECHO (GRASE) IMAGING

摘要

PROBLEM TO BE SOLVED: To provide a practical MRINMR pulse sequence by joining gradient echo to spin echo effectively. SOLUTION: This is a method that detects MRI signal from NMR nuclear type for animal excluding human being. Nuclears are made to perform a precession to start TR interval. And, 180 deg. NMR RF pulse is impressed repeatedly substantially at 180 deg. with successive equal time interval in the same TR interval. And, more precession of the nuclears is performed to generate a series of NMR spin echo. Each of the equal time interval starts the TR interval, next, the interval between the first 180 deg. NMR RF pulse is made substantially twice. Only after the each 180 deg. NMR RF pulse, more than one alternate polarity readout gradient magnetic field pulse are impressed to generate the more than one subsequence of gradient echo.