| 摘要 |
PURPOSE:To compensate for deviation between a resonance frequency and a reference frequency without using nuclide differing from an object to be measured and without controlling a static magnetic field by feedback controlling of a reference signal generator based on deviation between the resonance frequency and a reference frequency with the application of the static magnetic field. CONSTITUTION:A nuclear magnetic resonance signal generated in an object 2 to be inspected with the application of an electrostatic magnetic field from an electrostatic magnetic field generator 1 is received with a receiver coil 6 and applied to a phase detector 8 via a low noise amplifier 7 to be detected in the phase by a reference signal from a reference signal generator 3. Then, deviation between the frequency of the resonance signal thus detected in the phase and the frequency of the reference signal is detected with a frequency analyzer 9. A reference signal generator 3 by the detection signal is feedback controlled to compensate the deviation between the reference signal and the resonance signal thereby forming a nuclear magnetic resonance image at a high accuracy and a high efficiency without using nuclide differing from an object to be measured and without controlling an electrostatic magnetic field. |
