| 摘要 |
Nuclear magnetic resonance apparatus including magnet apparatus (13) for generating a homogeneous static magnetic field between its magnetic poles, shims (16) of a magnetic substance mounted on the magnetic poles to apply a first gradient magnetic field intensity distribution in a direction rectangular as to the direction of line of magnetic force of the static magnetic field, gradient magnetic field generating electromagnetic apparatus (17) for generating a second gradient magnetic field having a gradient magnetic field intensity distribution in superimposition with the static magnetic field and for changing the magnetic field gradient of the first gradient magnetic field. An oscillator generates an oscillating output having a frequency corresponding to the nuclear magnetic resonance condition of an atomic nucleus to be measured, and a coil (8) wound around a body to be examined is connected to the output of said oscillator. A receiver (7) detects the nuclear magnetic resonance signals received by the coil and a gradient magnetic field controller (20) provides a magnetic field line equivalent to the combined gradient magnetic fields and is arranged to rotate the line along the section of the body to be examined by controlling said gradient magnetic field generating electromagnetic apparatus. A recorder 10 records the nuclear magnetic resonance signals which are then applied to a reconstruction (11) to reconstruct the concentration distribution of the specific atomic nuclei in the section of the body and thence to a display unit for depicting the result of reconstruction. |
