Abstract: A coil pad according to one embodiment is a coil pad that is placed between a receiving coil and a subject. The receiving coil is mounted on the subject and receives a magnetic resonance signal emitted from the subject. The coil pad includes a pad opening and a vibrating portion. The pad opening is aligned with a coil opening included in the receiving coil and forms a through-hole between the coil opening and the subject. The vibrating portion vibrates with a medium that transmits vibration being filled therein.

Abstract: MRI apparatus includes an RF coil device, a first radio communication unit, a second radio communication unit, an image reconstruction unit and a judging unit. The RF coil device detects an MR signal, and includes a data saving unit for storing the MR signal. The first radio communication unit wirelessly transmits the MR signal detected by the RF coil device, and the second radio communication unit receives the MR signal from the first radio communication unit. The image reconstruction unit reconstructs image data using the MR signal. The judging unit judges existence of a transmission error in radio communication between the first and second radio communication units. If the transmission error is present, the first radio communication unit wirelessly transmit the MR signal stored in the data saving unit to the second radio communication unit.

Abstract: According to one embodiment, a radio frequency coil unit includes cables, radio frequency coil elements and balun circuits. The cables correspond to channels. The radio frequency coil elements are directly or indirectly connected to the cables. The balun circuits suppress an influence of an unbalanced current flowing into partial radio frequency coil elements out of the radio frequency coil elements. A part of the cables pass through at least one of the balun circuits in contact with or in non-contact with at least one of the balun circuits.

Abstract: MRI apparatus includes a first radio frequency (RF) communication unit, a second RF communication unit, an image reconstruction unit and a table for loading an object. The first RF communication unit obtains a nuclear magnetic resonance (NMR) signal detected by an RF coil device, and wirelessly transmits a digitized NMR signal via an induced electric field. The second RF communication unit receives the NMR signal via the induced electric field. The image reconstruction unit reconstructs image data based on the NMR signal. The table includes a supporting unit which detachably supports the first RF communication unit to the second radio communication unit so that an interval between the first and second RF communication units enables RF communication via the induced electric field.

Abstract: MRI apparatus includes an RF coil device, a first radio communication unit, a second radio communication unit, an image reconstruction unit and a judging unit. The RF coil device detects an MR signal, and includes a data saving unit for storing the MR signal. The first radio communication unit wirelessly transmits the MR signal detected by the RF coil device, and the second radio communication unit receives the MR signal from the first radio communication unit. The image reconstruction unit reconstructs image data using the MR signal. The judging unit judges existence of a transmission error in radio communication between the first and second radio communication units. If the transmission error is present, the first radio communication unit wirelessly transmit the MR signal stored in the data saving unit to the second radio communication unit.

Abstract: In a radio frequency coil according to an embodiment, electrical conductors and circuit elements are arranged. The radio frequency coil is configured so that the direction in which two of the electrical conductors forming a ring are connected together by one or more of the circuit elements positioned between the electrical conductors is different from the circumferential direction of the radio frequency coil.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a first transmit coil transmitting a first RF pulse corresponding to a resonance frequency of a first nuclide species in an object placed in an imaging space, a first receive coil receiving a first NMR signal of the first nuclide species, a cable connected to the first receive coil, a balun attached to the cable and/or the first receive coil, a substance attached to the balun and/or a vicinity of the balun, the substance including a second nuclide species having a resonance frequency different from the resonance frequency of the first nuclide species, a second transmit coil transmitting a second RF pulse corresponding to a resonance frequency of the second nuclide species, and a second receive coil receiving a second NMR signal of the second nuclide species in the substance.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry and a display. The processing circuitry acquires information of an RF (radio frequency) coil. The processing circuitry sets a protocol to be applied to imaging using the RF coil before execution of the imaging. When there are a plurality of protocols that can be selected as the protocol applied to the imaging, the display displays at least one protocol narrowed down from the protocols as the protocol that can be applied to the imaging, based on information of the RF coil.

Abstract: An RF coil unit of an embodiment includes a plurality of first coil elements each having a first main loop which receives a magnetic resonance signal and a plurality of second coil elements each having a second main loop and a sub-loop protruding from a portion of the second main loop. Any combination of two coil elements chosen from the plural first coil elements and the plural second coil elements is arranged in an overlap area where areas surrounded by one and another one of the two coil elements overlap in such a way that the overlap area is located in an area surrounded by the first main loop.

Abstract: According to one embodiment, an MRI apparatus includes a first RF coil device, a radio communication unit and an image reconstruction unit. The first RF coil device is wirelessly connected to a second RF coil device, and receives a nuclear magnetic resonance signal wirelessly transmitted from the second RF coil device. The first RF coil device wirelessly transmits the nuclear magnetic resonance signal detect by the first RF coil device and the nuclear magnetic resonance signal obtained from the second RF coil device to the radio communication unit, via an induced electric field. The radio communication unit receives the nuclear magnetic resonance signals wirelessly transmitted from the first RF coil device via an induced electric field. The image reconstruction unit reconstructs image data on the basis of the nuclear magnetic resonance signals received by the radio communication unit.

Abstract: A coil pad according to one embodiment is a coil pad that is placed between a receiving coil and a subject. The receiving coil is mounted on the subject and receives a magnetic resonance signal emitted from the subject. The coil pad includes a pad opening and a vibrating portion. The pad opening is aligned with a coil opening included in the receiving coil and forms a through-hole between the coil opening and the subject. The vibrating portion vibrates with a medium that transmits vibration being filled therein.

Abstract: According to one embodiment, magnetic resonance imaging apparatus includes a transmission coil, a plurality of reception channels, transmission/reception circuitry, and processing circuitry. The transmission coil transmits an RF wave to a subject. The reception channels receive MR signals generated from the subject. The transmission/reception circuitry controls the transmission coil to change the flip angle of a nucleus contained in the subject and excited by the transmitted RF wave. The processing circuitry determines whether the reception channels include an impaired channel, based on the comparison between the distributions of the signal values of the received MR signals with respect to the changing flip angles among the reception channels.

Abstract: A coil pad according to one embodiment is a coil pad that is placed between a receiving coil and a subject. The receiving coil is mounted on the subject and receives a magnetic resonance signal emitted from the subject. The coil pad includes a pad opening and a vibrating portion. The pad opening is aligned with a coil opening included in the receiving coil and forms a through-hole between the coil opening and the subject. The vibrating portion vibrates with a medium that transmits vibration being filled therein.

Abstract: A couchtop attachment-detachment type RF coil according to an embodiment is attachable to and detachable from connector embedded in a couchtop of a magnetic resonance imaging apparatus, and forms a cable-free RF coil by being fitted with the connector and thereby joined with a coil element embedded in the couchtop, the cable-free RF coil corresponding to one area to be imaged of a subject.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a plurality of first coil elements and a connector. The first coil elements are embedded in a couchtop on which a subject is placed. The connector is provided in such a region of the couchtop that is positioned on the inside of the loop of at least one of the first coil elements. It is possible to attach and detach a second coil element different from the first coil elements to and from the connector.

Abstract: In one embodiment, an RF coil device includes a base board, a belt member, a first coil element, a second coil element inside the base board, and a connecting unit. Both ends of the belt member are respectively connected to mutually separated places on the base board, so that the center part of the belt member is located on the anterior surface of the base board. The belt member is curved to form airspace between the center part thereof and the anterior surface for letting an arm pass through in interdigitation state. The first coil element includes first and second partial coils inside the belt member, and becomes a loop coil element by their connection. The connecting unit detachably connects the base board to the belt member, and mutually connects the first and second partial coils in the interdigitation state.

Abstract: In one embodiment, an MRI apparatus includes receiving coils each including an A/D converter configured to convert an MR signal received from an object into a digital signal by sampling the MR signal, a clock generation circuit configured to generate a reference clock of the sampling, and a radio transmission circuit configured to wirelessly transmit a digitized MR signal; and a main body configured to wirelessly receive the digitized MR signal and generate an image of the object by reconstructing the digitized MR signal, wherein one of the receiving coils selected as a reference receiving coil by the main body is configured to transmit the reference clock to each of other receiving coils by radio or by wire; and each of the other receiving coils is configured to synchronize the reference clock generated by the clock generation circuit with the reference clock transmitted from the reference receiving coil.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes an RF coil and an RF shield. The RF coil is formed in a substantially cylindrical shape. The RF shield is formed in a substantially cylindrical shape and is disposed on an outer circumferential side of the RF coil. The RF shield is provided with a plurality of slits that are in a form of a line extending in an axial direction and having an asymmetrical length in the axial direction with respect to a center in the axial direction and are disposed so as to alternately switch positions thereof in the axial direction along a circumferential direction.

Abstract: In a magnetic resonance imaging apparatus, a transmission RF coil is configured to emit an RF pulse generated by using a first clock. In addition to an echo signal emitted from a patient, a reception RF coil is configured to further receive the RF pulse emitted by the transmission RF coil and configured to transmit, via a wireless communication, a multiplexed signal in which the echo signal digitalized by using a second clock, the RF pulse, and the second clock are multiplexed together. Wireless receiving circuitry is configured to receive the multiplexed signal via a wireless communication. Correcting circuitry is configured to correct the phase of the echo signal on the basis of the RF pulse and the second clock restored from the multiplexed signal received via the wireless communication. Reconstructing circuitry is configured to reconstruct an image by using the corrected echo signal.

Abstract: An RF coil includes a puncture needle insertion assembly in which a plurality of holes into which a puncture needle is inserted are formed within a surface of the puncture needle insertion assembly. In the puncture needle insertion assembly, conductors of a plurality of elements of a coil that are being insulated from one another are laid to meander on a frame between the holes.