Nmr imaging method

Abstract

Abstract PURPOSE:To obtain the excellent expanded image data in a short time, by sequentially applying a 90 deg. pulse under the state a gradient magnetic field is applied to the first Z direction, a 180 deg. pulse in a gradient magnetic field in the second Y direction in an X-Y plane, and a gradient magnetic field in the third X direction, and receiving an NMR spin echo signal. CONSTITUTION:A static magnetic field Bo is applied in the direction of Z by a main coil 1. A 90 deg. pulse is applied under the state a gradient magnetic field Gz is applied by a Gz coil 4. Only a spin within a minute thickness DELTAZ on the Z coordinate is excited. Then a gradient magnetic field Gx is applied by a Gx coil 2, and the spin is dispersed. Then, a gradient magnetic field Gy is applied by a Gy coil 3. Under this state, a 180 deg. pulse is applied, and the spin in a minute width DELTAY on the Y coordinate is inverted by 180 deg.. Then, the gradient magnetic field Gx for echo is applied, and an NMR signal within the specified ranges of the thickness of DELTAZ and the width DELTAY is taken out. Thus the excellent expanded image data can be obtained in a short time.

Inventors

• 👤 Shiro Oikawa
• 👤 四郎 及川

Bibliographic Details