| 摘要 |
PURPOSE:To calculate a phase correction angle at a high speed without applying Fourier transformation processing by correcting the shift in phase of a nuclear magnetic resonance (NMR) signal by using a specified expression. CONSTITUTION:A static magnetic field control part 13 generates a static magnetic field for determining the resonance frequency of the NMR signal. A slanting magnetic field control part 8, on the other hand, generates an optional slanting magnetic field fit for the purpose. An RF control part 3 controls a high frequency magnetic field generated so as to resonate specified nuclear of a body to be inspected, and flows a current to a coil by a transmitter 5 with a signal from a selectively excited modulation part 4. A receiver 6 detects an NMR signal generated by the object body and extracts a free induction attenuation signal. Then, the phase difference of the NMR signal due to characteristics, etc., of the receiver 6 is corrected by using the specified expression so that the real part of an initial value corresponding to the center of the echo of the NMR singal goes to maximum and the imaginary part goes to zero; and the obtained measurement data after the correction is used to perform normal image reconstitution processing. |
