Abstract
The invention describes an acoustic liner for use with a magnetic field gradient coil, especially for use in magnetic resonance imaging (MRI) systems. The liner comprises an acoustic sheet (12), preferably of compressible material, adapted to be fitted to the gradient coil, and an acoustic conducting path (10) for carrying an electrical current provided on or in the sheet, arranged such that in use a current pulse can be applied to the gradient coil and a current pulse can be applied to the acoustic conducting path in synchronism therewith, wherein the acoustic conducting path is arranged such that Lorentz forces on the acoustic conducting path in a magnetic field cause the acoustic conducting path to move relative to the gradient coil in such a way that the inner surface (9) of said acoustic sheet remains substantially stationary.
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