Toshiba Medical Systems Corporation

Kabushiki Kaisha Toshiba

Canon Medical Systems Corporation

Quality Electrodynamics, LLC

Shinji Mitsui

Kazuya Okamoto

Sadanori Tomiha

Manabu Ishii

Miyuki Ota

Xiaoyu Yang

Yoshinori Hamamura

Satoshi Imai

Mitsuo Takagi

Christopher J Allen

Nicholas Castrilla

Takahiro Ishihara

Masahiro Fukushima

Hiroki Motohashi

Hiromitsu Takamori

Ayumi Katsunuma

Keiji Tahira

Junichi Makita

According to one embodiment, the MRI apparatus includes an RF coil apparatus having a coil element, a coil port to which the RF coil apparatus is connectible, receive circuitry receiving a signal detected by the RF coil apparatus via the coil port when neither an RF pulse nor a gradient magnetic field is being applied, and performing A/D conversion with an A/D converter, and processing circuitry detecting an abnormality based on the signal. With the RF coil apparatus being connected to the coil port, the receive circuitry switches at least one switch provided in a section between the coil element and the A/D converter between on and off, and receives the signal. The processing circuitry compares a signal of a path where the coil element and A/D converter are connected with a signal of a path where the coil element and A/D converter are not connected, and detects the abnormality.

Magnetic resonance imaging apparatus and abnormality detection method

A medical image diagnosis apparatus according to an embodiment includes a storage circuitry and processing circuitry. The storage circuitry is configured to store therein workflow information indicating a plurality of procedures related to a preparation for an imaging process. The processing circuitry is configured to analyze an image obtained by a camera. The processing circuitry is configured to identify which of the plurality of procedures has been performed on the basis of the workflow information and a result of the analysis performed on the image and to cause an informing device to provide information about one or more of the procedures corresponding to a result of the identifying.

Medical image diagnosis apparatus and magnetic resonance imaging apparatus

According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry generates positional information related to a positional relationship between a transmitter coil and a receiver coil based on a magnetic resonance signal received from a subject. The processing circuitry adjusts an irradiation intensity of an RF pulse to be irradiated on the subject in accordance with the positional information.

Magnetic resonance imaging apparatus using positional information based on an image obtained by reconstructing a magnetic resonance signal

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.

Couchtop attachment-detachment type RF coil and magnetic resonance imaging apparatus

A magnetic resonance imaging apparatus includes a static magnetic field generator, a gradient magnetic field generator, a transmission coil and a processing circuitry. The static magnetic field generator generates a static magnetic field. The gradient magnetic field generator generates a gradient magnetic field. The transmission coil applies an RF pulse to an object. The processing circuitry determines high frequency pulse power absorbed by other than the object in accordance with a volume of the object and computes a specific absorption rate (SAR) with the determined high frequency pulse power.

Magnetic resonance imaging apparatus and SAR computing method

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.

RF coil device and magnetic resonance imaging apparatus

An electrically-controlled failsafe switch is included in an MRI transmit-and-receive RF coil assembly so as to protect it from induced RF currents in the event it is disconnected from an MRI system, but inadvertently left linked to strong MRI RF fields during imaging procedures using other RF coils.

Failsafe protection from induced RF current for MRI RF coil assembly having transmit functionality

A radio frequency coil assembly is provided that includes a first radio frequency coil for receiving a magnetic resonance signal from a tested body; a second radio frequency coil for receiving a magnetic resonance signal from the tested body; and a third radio frequency coil for receiving a magnetic resonance signal from the tested body and having a shape that is different from that of at least one of the first and second radio frequency coils so as to increase local sensitivity in an image-picked-up region.

RF coil assembly for MRI using differently shaped and/or sized coils

A receiving RF coil includes a coil element group having a figure-eight coil, a first loop coil arranged at the center of the figure-eight coil, and a second loop coil partially overlaid on the first loop coil. Furthermore, a path switching control unit switches the transmitting paths of a signal so that the signal can be received and/or transmitted with a combination of the first loop coil and the second loop coil or a combination of the figure-eight coil and the first loop coil.

Magnetic resonance imaging apparatus and RF coil

When an RF coil in a magnetic resonance imaging system includes a plurality of conductive members and circuit elements connected to the conductive members, at least part of each of the conductive members is formed to a thickness so as to dissipate heat generated from the circuit elements. Moreover, the magnetic resonance imaging system is configured to include a cooling unit that circulates cooling air over the surfaces of the circuit elements provided in the RF coil.

MRI system and RF coil with enhanced cooling in vicinty of included circuit elements

A radio frequency coil assembly is provided. The radio frequency coil assembly includes: a first radio frequency coil for receiving a magnetic resonance signal from a tested body; a second radio frequency coil for receiving a magnetic resonance signal from the tested body; and a third radio frequency coil for receiving a magnetic resonance signal from the tested body and having a shape which is different from that of at least one of the first and second radio frequency coils so as to increase a local sensitivity in an image-picked-up region.

A radio-frequency coil has a first element and a second element both being adjacently arranged so as to nip a division/join portion. The first element has a first main loop portion provided along an arrangement plain surface and a first sub-loop portion provided along a surface substantially perpendicular to the arrangement plain surface. The second element has a second main loop portion provided along the arrangement plain surface and a second sub-loop portion provided facing the first sub-loop. The first sub-loop portion and the second sub-loop portion generate an induced electromotive force such that, among magnetic fields generated when a current flows in one coil, a summation of the magnetic fields, which interlink with the other coil, becomes zero.

Growing community of inventors

Nasushiobara, Japan

Shinji Mitsui