Abstract: An electromagnetic shielding device for an MRI apparatus having a fastener for fastening the shielding device to a shielding element in the apparatus so as to surround said opening of a cavity and which shielding device is electrically connected to ground, wherein the fastener electrically connects the shielding device to the shielding element at the cavity opening; wherein the shielding device is flexible and is cylindrical and/or in a truncated cone shape, and has at least a passage opening for the body part; the shielding device is adapted to be fastened or compressed at said opening to the body part with a predetermined force in such a way as to close said opening and generate a low-impedance electrical contact between the body part and said shielding device to prevent or reduce the infiltration of electromagnetic noise from outside to inside said detection cavity; the shielding device is made of a first inner conductive material layer and an outer insulating fabric layer; and further includes at least on

Abstract: An electromagnetic shielding device for an MRI apparatus having a fastener for fastening the shielding device to a shielding element in the apparatus so as to surround said opening of a cavity and which shielding device is electrically connected to ground, wherein the fastener electrically connects the shielding device to the shielding element at the cavity opening; wherein the shielding device is flexible and is cylindrical and/or in a truncated cone shape, and has at least a passage opening for the body part; the shielding device is adapted to be fastened or compressed at said opening to the body part with a predetermined force in such a way as to close said opening and generate a low-impedance electrical contact between the body part and said shielding device to prevent or reduce the infiltration of electromagnetic noise from outside to inside said detection cavity; the shielding device is made of a first inner conductive material layer and an outer insulating fabric layer; and further includes at least on

Abstract: A method for compensating for magnetic noise fields in spatial volumes includes determining the strength of a magnetic field outside said spatial volume; defining the correlation between the noise field outside the spatial volume and the corresponding noise field inside said spatial volume; generating a magnetic compensation field for neutralizing the noise field in said spatial volume. The method further provides separate detection of noise fields with frequencies in the range of at least two different frequency bands.

Abstract: A method for compensating for magnetic noise fields in spatial volumes includes determining the strength of a magnetic field outside said spatial volume; defining the correlation between the noise field outside the spatial volume and the corresponding noise field inside said spatial volume; generating a magnetic compensation field for neutralizing the noise field in said spatial volume. The method further provides separate detection of noise fields with frequencies in the range of at least two different frequency bands.