Disclosed is a magnetic resonance imaging (MRI) apparatus with a spirally extended monopole antenna structure whereby magnetic field homogeneity is improved. The apparatus includes: a cylinder body 110; a plurality of monopole antennas forming an array, the antenna being spirally arranged along a surface of the cylinder body 110 at a predetermined inclination angle relative to a central axis of the cylinder body 110; a ground plate 130 in which ends of the monopole antennas are arranged on one surface of the ground plate 130 in a circular arrangement; and a plurality of coaxial cables 140 in which signal lines thereof are respectively connected to the monopole antennas and ground lines thereof are connected to the ground plate 130.

An arrangement for shielding an NMR tool from electromagnetic noise, having a nuclear magnetic resonance tool configured to send and receive signals, a first shield configured around a nuclear magnetic resonance antenna of the nuclear magnetic resonance tool and a second shield configured to reduce the effects of eddy currents in the first shield.

An arrangement for shielding an NMR tool from electromagnetic noise, having a nuclear magnetic resonance tool configured to send and receive signals, a first shield configured around a nuclear magnetic resonance antenna of the nuclear magnetic resonance tool and a second shield configured to reduce the effects of eddy currents in the first shield.

The present invention provides a receive coil unit (140) comprising a receive coil array (142) for use in a magnetic resonance imaging system (110) with multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby each antenna unit (144) comprises a coil element (146) sensitive to B-field signals, and each antenna unit (144) comprises an E-field antenna (148) sensitive to E-field signals. The present invention also provides a magnetic resonance imaging system (110) comprising a receive coil unit (140) with a receive coil array (142) having multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby the receive coil unit (140) is provided as a receive coil unit (140) as specified above. Still further, the present invention provides a method for magnetic resonance imaging comprising the steps of providing a receive coil unit (140) comprising a receive coil array (142) for use in a magnetic resonance imaging system (110) with multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby each antenna unit (144) comprises a coil element (146) sensitive to B-field signals, and each antenna unit (144) comprises an E-field antenna (148) sensitive to E-field signals, and performing de-noising of the B-field signals received from the coil elements (146) of the receive coil unit (140) by filtering noise signals, as received from the E-field antenna (148), from the B-field signals.

The present invention provides a receive coil unit (140) comprising a receive coil array (142) for use in a magnetic resonance imaging system (110) with multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby each antenna unit (144) comprises a coil element (146) sensitive to B-field signals, and each antenna unit (144) comprises an E-field antenna (148) sensitive to E-field signals. The present invention also provides a magnetic resonance imaging system (110) comprising a receive coil unit (140) with a receive coil array (142) having multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby the receive coil unit (140) is provided as a receive coil unit (140) as specified above. Still further, the present invention provides a method for magnetic resonance imaging comprising the steps of providing a receive coil unit (140) comprising a receive coil array (142) for use in a magnetic resonance imaging system (110) with multiple antenna units (144) sensitive to magnetic resonance signals, i.e. antenna units (144) sensitive to B-field signals, whereby each antenna unit (144) comprises a coil element (146) sensitive to B-field signals, and each antenna unit (144) comprises an E-field antenna (148) sensitive to E-field signals, and performing de-noising of the B-field signals received from the coil elements (146) of the receive coil unit (140) by filtering noise signals, as received from the E-field antenna (148), from the B-field signals.

The present invention provides a radio frequency (RF) coil (140) for applying an RF field to an examination space (116) of a magnetic resonance (MR) imaging system (110) and/or for receiving MR signals from the examination space (116), whereby the RF coil (140) is provided having a tubular body (142), the RF coil (140) is segmented in a longitudinal direction (154) of the tubular body (142) into two coil segments (146), and the two coil segments (146) are spaced apart from each other in the longitudinal direction (144) of the tubular body (142), whereby a gap (148) is formed between the two coil segments (146). The present invention further provides a magnetic resonance (MR) imaging system (110) comprising at least one radio frequency (RF) coil (140) as specified above. The present invention still further provides a medical system (200) comprising the above magnetic resonance (MR) imaging system (110) and a medical device (202), which is arranged to access to the examination space (116) of the magnetic resonance (MR) imaging system (110) through the gap (148) of the RF coil (140). Even further, the present invention provides a method for applying a radio frequency (RF) field to an examination space (116) of a magnetic resonance (MR) imaging system (110), comprising the steps of providing at least one above radio frequency antenna device (140), and commonly controlling the two RF coil segments (146) to provide a homogenous B.sub.1 field within the examination space (116), in particular within the gap (148).

The present invention provides a radio frequency (RF) coil (140) for applying an RF field to an examination space (116) of a magnetic resonance (MR) imaging system (110) and/or for receiving MR signals from the examination space (116), whereby the RF coil (140) is provided having a tubular body (142), the RF coil (140) is segmented in a longitudinal direction (154) of the tubular body (142) into two coil segments (146), and the two coil segments (146) are spaced apart from each other in the longitudinal direction (144) of the tubular body (142), whereby a gap (148) is formed between the two coil segments (146). The present invention further provides a magnetic resonance (MR) imaging system (110) comprising at least one radio frequency (RF) coil (140) as specified above. The present invention still further provides a medical system (200) comprising the above magnetic resonance (MR) imaging system (110) and a medical device (202), which is arranged to access to the examination space (116) of the magnetic resonance (MR) imaging system (110) through the gap (148) of the RF coil (140). Even further, the present invention provides a method for applying a radio frequency (RF) field to an examination space (116) of a magnetic resonance (MR) imaging system (110), comprising the steps of providing at least one above radio frequency antenna device (140), and commonly controlling the two RF coil segments (146) to provide a homogenous B.sub.1 field within the examination space (116), in particular within the gap (148).

A shielded connection line for a magnetic resonance tomography system includes a signal conductor, a shield for the signal conductor, and a plug-in connector. The plug-in connector has a large number of connection contacts that are arranged in a two-dimensional matrix and are electrically insulated from each other in the plug-in connector. The signal conductor is in galvanic contact with a first connection contact, and three second connection contacts adjacent to the first connection contact and surrounding the first connection contact are galvanically connected to the shield.

The invention relates to a hybrid medical PET-SPECT/MR imaging device comprising at least one scintillating crystal and at least one module for detecting radiation which contains at least one matrix of photodetectors and an electronics section, such that said module has a mechanical structure, the external, internal or both surfaces of which are divided into at least two sections, of which at least one is coated in graphene, and the rest in non-ferromagnetic conductive material, or all the sections are coated in graphene, and such that the coating forms a Faraday cage. The invention also relates to a shielding against radiofrequency for a medical imaging device, comprising a graphene coating, which is continuous or in bands, on all the faces of the mechanical structure of the detection module of the device, or a graphene coating, continuous or in bands, on at least one face, combined with a coating of non-ferromagnetic conductive materials on the remaining faces, and said shielding forming a Faraday cage.

The invention relates to a hybrid medical PET-SPECT/MR imaging device comprising at least one scintillating crystal and at least one module for detecting radiation which contains at least one matrix of photodetectors and an electronics section, such that said module has a mechanical structure, the external, internal or both surfaces of which are divided into at least two sections, of which at least one is coated in graphene, and the rest in non-ferromagnetic conductive material, or all the sections are coated in graphene, and such that the coating forms a Faraday cage. The invention also relates to a shielding against radiofrequency for a medical imaging device, comprising a graphene coating, which is continuous or in bands, on all the faces of the mechanical structure of the detection module of the device, or a graphene coating, continuous or in bands, on at least one face, combined with a coating of non-ferromagnetic conductive materials on the remaining faces, and said shielding forming a Faraday cage.