Patent ID: 7529575

Claim:
A nuclear magnetic resonance imaging device, comprising: a magnetic structure defining an imaging cavity for housing at least part of a body of a patient, the magnetic structure providing a magnetic field for permeating at least part of the imaging cavity during imaging, the magnetic structure comprising an opening for the imaging cavity, said opening providing access to the imaging cavity from outside of the magnetic structure; shielding means for at least partially closing said opening of the imaging cavity, the shielding means comprising electrically conductive material and being electrically grounded, the shielding means being secured to the magnetic structure substantially adjacent said opening; guiding means for guiding the shielding means, the shielding means being movable along the guiding means from an inactive configuration in which the opening is substantially open to an active configuration in which the shielding means at least partially closes the opening; wherein the shielding means comprises an electrically conductive frame provided substantially adjacent the opening for the imaging cavity, the shielding means further comprising a shielding member, said guiding means further comprising a guide provided in said electrically conductive frame, said shielding member being slidably mounted in said guide, the guide being electrically conductive and the shielding member electrically conductive and electrically grounded.