Removable electromagnetic shielding device for magnetic nuclear magnetic resonance apparati and method for making the same

摘要

Removable electromagnetic shielding device (1) for MRI apparati having a magnetic structure defining a cavity with at least an opening for introducing the body or the part thereof under examination, which cavity is surrounded by shielding element having an opening coinciding with said at least one opening of the cavity and means attaching the removable device which surround said opening of the cavity and which shielding device is electrically connected to the ground, which removable device:- is provided at opening/openings of the detection cavity and at least electrically connected thereto;- is flexible and it is cylindrical and/or truncated cone shaped and it has at least a passage opening for the body or parts thereof;- may be fastened or compressed at said opening with a predetermined force against said body parts in such a way as to close said opening/openings and generate a low-impedance electrical contact between the body and said device to prevent or reduce the infiltration of electromagnetic noise from the outside to the inside of said detection cavity,- is made of an inner conductive material layer and an outer insulating fabric layer.;Said device comprises at least one, preferably two, additional inner electrically conductive material layers overlapped to the first inner electrically conductive material layer. Method for making said device.