| 摘要 |
PROBLEM TO BE SOLVED: To compensate the fluctuation of a high-speed magnetic field used for collecting NMR data of one line by measuring the fluctuation of a static magnetic field-concerning time generated by inclined magnetic field pulses, correcting the error present in the magnetic field present within a prescribed volume by use of the fluctuation. SOLUTION: This NMR system generates an inclined magnetic field and an RF nutation pulse through MRI pulse sequence controllers 17 and 18 under the control of a programmable computer/processor 19. Further, the processor 19 controls an inclined magnetic field pulse amplifier 20 and FR signal line and amplifier circuits 21 and 22. The MR signal circuit 22 is properly interfaced with an MR signal RF coil 16 arranged within the shielded MRI system gantry. The received MR response is digitized by a digitizer 23, and supplied to the proper processor 19 in order to collect the MR signal data and control the process.
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