PURPOSE: To improve an image of an NMR (nuclear magnetic resonance) tomography imaging system by deriving a an offset data from a part which does not substantially contain an echo signal before and after a peak of the echo signal, and subtracting an offset quantity from the echo signal.
CONSTITUTION: A static magnetic field coil 2 is provided on a magnetic assembly 1 and a magnetic field is applied to a body to be inspected. Also, a nuclear spin is excited by giving a high frequency pulse to an exciting coil 3. Also, position information of the body to be inspected is obtained by applying a gradient magnetic field coil 4. Moreover, an NMR signal is detected by a detecting coil 5. Subsequently, a static magnetic field is fed to the body to be detected, an RF signal is supplied to the exciting coil 3 from a controller 20, and the peak of an echo signal is detected. Before and after this peak, a signal of a part which does not contain the echo signal substantially is measured, and an offset quantity is derived. Next, the offset quantity is subtracted from the echo signal. Accordingly, since the offset quantity is derived and it becomes a corrected quantity, an NMR tomographic image excellent in quality can be obtained.
HOSHINO KAZUYA
SUGIYAMA SUNAO
MATSUURA HIROYUKI
YOKOGAWA MEDICAL SYST
| JPS55112556A | 1980-08-30 | |||
| JPS5938637A | 1984-03-02 |
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