Gradient coil structure for magnetic resonance imaging
AssigneeTesia Engineering Ltd.
InventorFrederick Thomas David Goldie
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Abstract
A gradient coil structure for use in MRI apparatus has a main gradient coil 20 and a shielding coil 21, a portion of the shielding coil being disposed outwardly from the main coil. The coils are configured so that in a peripheral region 25 relative to the image region 22 the are almost coincident and the coils extend forwardly at an angle to the remainder of the main coil so that the main coil appears concave from the imaging region 22. This arrangement provides improved shielding efficiency.
Claims5
A gradient coil structure for use in MRI apparatus, said coil structure comprising a main gradient coil and a shielding coil, said shielding coil having a portion thereof disposed outwardly from the main gradient coil and said coils being configured so that in a peripheral region relative to the imaging volume, the coils are almost coincident, wherein, the coils in the coincident region extend forwardly at an angle to the remainder of the main coil so that the main coil appears concave from the imaging volume.
An MRIS apparatus including a gradient coil structure according to any preceding claim.
Dependencies are inferred from the claim text.