Shimming in magnetic resonance imaging

Details Shimming in magnetic resonance imaging Shimming in magnetic resonance imaging

1996-01-19

1998-06-30

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3320, A61B 500

Patent

active

057739765

ABSTRACT:
An MRI system is provided for improving the magnetic coupling and positional relationship between gradient coils and shim coils, thus simplifying positioning of the coils (retention of orthogonality), designing an MRI system compactly, and reducing cost. An MRI system comprises a magnet generating a static magnetic field and a gradient coil unit generating a gradient magnetic field superposed on the static magnetic field. The gradient coil unit is formed into a substantially cylindrical shape having an outer circumferential surface, and shields the gradient magnetic field from being leaked out into a radially outer space. The MRI system further comprises a shim coil unit generating a correcting magnetic field homogenizing the static magnetic field. The shim coil unit is mounted on the outer circumferential surface of the gradient coil unit in common serving as a bobbin for the shim coil unit.

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