Synaptive Medical Inc.

Synaptive Medical (barbados) Inc.

Other

Chad Tyler Harris

Jeff Alan Stainsby

Alexander Gyles Panther

Cameron Anthony Piron

Philip James Beatty

Geron Andre Bindseil

Geron André Bindseil

Andrew Thomas Curtis

William Bradfield Handler

Sheryl Rae Thingvold

Stephen B E McFadyen

Blaine Alexander Chronik

Ian Robert Oliphant Connell

David Mark Deschenes

Fergal Kerins

Timotheus Anton Gmeiner

Gregory Allan Whitton

Ian Connell

Alexander Gylers Panther

Vincent Luciani

Curtis Nathan Wiens

Gal Sela

Alex Panther

Mark Tullio Morreale

Mark Tuilio Morreale

Phillip J Beatty

Gai Sela

Phil J Beatty

Christopher Kumar Anand

Curtis Nathan Weins

Timothy James Scholl

Geron Bindseil

Ian Robert Connell

William Handler

Stephen Be Mcfadyen

Steve Mcfadyen

A method of imaging an implant device in a computing device is provided. The computing device includes a processor interconnected with a memory and a display. The method includes, at the processor: obtaining a first magnetic resonance (MR) image of a patient tissue, the first MR image containing a first magnetic field strength indicator; responsive to the implant device being inserted in the patient tissue, obtaining a second MR image of the patient tissue, the second MR image containing a second magnetic field strength indicator smaller than the first magnetic field strength indicator; registering the second MR image with the first MR image; generating a composite image from the first MR image and the second MR image; and presenting the composite image on the display.

Method, system and apparatus for image-guided insertion of implant devices

Some implementations provide an MRI system that includes: a housing having a bore accommodating a portion of a subject; a main magnet enclosed by said housing and configured to generate a substantially uniform magnet field within the bore; a gradient sub-system to provide perturbations to the substantially uniform magnet field; a flexible coil assembly configured to (i) receive radio frequency (RF) signals from the subject in response to the portion of the subject being scanned, and (ii) generate and apply Bshimming to improve a field homogeneity of the substantially uniform magnetic field; and a control unit configured to: drive the gradient sub-system using a gradient waveform; and receive measurement results responsive to the gradient waveform such that a coupling between the gradient sub-system and the flexible coil assembly is determined and subsequently reduced in response to the determined coupling exceeding a pre-determined threshold.

System and method for using coils in magnetic resonance imaging

A magnetic resonance imaging (MRI) system includes a set of magnet coils for generating a magnetic field. The set of magnet coils are composed of a superconducting material. The system further includes a mechanical cryocooler in thermal contact with the set of magnet coils and operable to reduce and maintain a temperature of the set of magnet coils below a transition temperature of the superconducting material, and an energy storage device coupled to the set of magnet coils. The energy storage device may be capable of receiving and storing energy dissipated from the set of magnet coils during rapid shutdown of the set of magnet coils. The system may also include a controller coupled to the energy storage device. The controller may be programmed to recharge the set of magnet coils using the energy stored in the energy storage device during the rapid shutdown of the set of magnet coils.

Magnetic resonance imaging system and method for rapid shutdown and recharge of a superconducting magnet

A coil apparatus and methods for magnetic resonance imaging involving a wire winding, the wire winding having at least one of: a hollow cross-section wire and a solid cross-section wire, the solid cross-section wire having at least one of: a solid small cross-section wire and a solid large cross-section wire, the solid large cross-section wire having a thickness greater than that of the solid small cross-section wire, and the solid small cross-section wire disposed in one of adjacent and proximate at least one of the hollow cross-section wire and the solid large cross-section wire, whereby at least one of current density, winding density, and heat extraction are increasable.

Gradient coil apparatus and methods for MRI

Systems and methods for imaging a subject with a magnetic resonance imaging system using magnetic field gradients generated by one or more gradient coils operating with gradient coil settings, such as gradient amplitudes and gradient slew rates, above a threshold at which peripheral nerve stimulation is likely to be induced in the subject. A dielectric assembly is positioned adjacent a skin surface of the subject such that the dielectric assembly attenuates the local electric fields induced by the magnetic field gradients, which would be likely to induce PNS when the dielectric assembly is not arranged adjacent the skin surface of the subject. As a result of the dielectric assembly placed adjacent the skin surface of the subject, the gradient coil settings can be increased above the threshold without inducing PNS in the subject.

System and method for reducing peripheral nerve stimulation at higher gradient amplitudes and faster gradient slew rates in magnetic resonance imaging

A fat saturation method for a magnetic resonance imaging system having a main magnet providing a magnetic field BThe method includes: driving a shim coil assembly with a first set of shimming currents to sufficiently alter a Bfield inhomogeneity of the magnetic field Bwithin a region that includes a first imaging volume of interest such that water saturation inside the region is reduced from before the first set of shimming currents are applied; applying a fat saturation pulse to the region; identifying the first imaging volume of interest from the region; driving the shim coil assembly with a second set of shimming currents to alter the Bfield inhomogeneity of the magnetic field Bwithin the first imaging volume of interest such that the Bfield inhomogeneity within the first imaging volume of interest is reduced; and obtaining magnetic resonance signals from the first imaging volume of interest.

Dynamic Bshimming for improved fat saturation in magnetic resonance imaging (MRI)

Systems and methods for magnetic field-dependent relaxometry using magnetic resonance imaging ('MRI') are provided. Relaxation parameters, including longitudinal relaxation time ('T1') and transverse relaxation time (&#x201c;T2&#x201d;), are estimated from magnetic resonance signal data acquired at multiple different magnetic field strengths using the same MRI system. By measuring these relaxation parameters as a function of magnetic field strength, T1 dispersion data, T2 dispersion data, or both, are generated. Based on this dispersion data, quantitative physiological parameters can be estimated. As one example, iron content can be estimated from T2 dispersion data.

Systems and methods for magnetic field-dependent relaxometry using magnetic resonance imaging

A portable magnetic resonance imaging (MRI) system and methods, involving a magnet configured to generate a magnetic field, the magnet being a portable magnet transportable on a cart, and at least one coil assembly disposed in relation to the magnet, the at least one coil assembly having at least one gradient coil.

Coil assembly for magnetic resonance imaging

A method, electromagnet device, and system for reducing a higher order term of a concomitant field in an imaging magnetic field during magnetic resonance imaging is described. The electromagnet system has a first shim coil configured to be driven to generate a first compensation magnetic field during imaging according to a first second-order compensation term, the first compensation magnetic field having a similar amplitude but opposite direction as that of a first second-order concomitant magnetic field.

Real-time compensation of high-order concomitant magnetic fields

A method of manufacturing an electromagnet coil for use in a magnetic resonance imaging (MRI) system includes: generating a coil surface representation defining a surface to contain the electromagnet coil; defining a set of performance metric functions, the set including a mutual inductance function defining mutual inductance between the electromagnet coil and a second electromagnet coil; defining a performance functional based on the coil surface representation and the set of performance metric functions; optimizing the performance functional; generating a current density pattern over the coil surface representation based on the optimized performance functional; and obtaining coil windings defining the electromagnet coil from the current density pattern.

System and method of coil design to reduce magnetic coupling

Systems and methods involving: a housing having a bore in which a subject to be imaged is placed; a main magnet configured to generate a volume of magnetic field within the bore, the volume of magnetic field having inhomogeneity below a defined threshold; gradient coils configured to linearly vary the volume of magnetic field as a function of spatial location; pulse-generating coils configured to generate and apply radio frequency (RF) pulses to the volume of magnetic field in sequence to scan the portion of the subject; shim gradient coils configured to perturb a spatial distribution of the linearly varying volume of magnetic field; and a control unit configured to operate the gradient coils, pulse-generating coils, and shim gradient coils such that only the user-defined region within the volume of magnetic field is imaged.

Adaptive shim coils for MR imaging

An automatic protocolling system and methods involving a processor operable by way of a set of executable instructions storable in relation to a nontransient memory device, the set of executable instructions configuring the processor to: receive information relating to an initial protocol comprising an initial ordering of a plurality of sequences, the information comprising data relating to an interaction extent value of at least one of an imaging system and a patient as a function of time corresponding to each sequence in the plurality of sequences, the data relating to a time-integrated effect of each sequence in the plurality of sequences; and dynamically determine an alternative protocol comprising an alternative ordering of the plurality of sequences based on the time-integrated effect, whereby an alternative protocol is provided.

Automatic protocolling to reduce system and patient interactions

Described here are systems and methods for mitigating or otherwise removing the effects of short-term magnetic field instabilities caused by oscillations of the cold head in a cryogen-free magnet system used for magnetic resonance systems, such as magnetic resonance imaging ('MRI') systems, nuclear magnetic resonance ('NMR') systems, or the like.

Reducing magnetic field instabilities caused by oscillations of a mechanical cryo-cooler in magnetic resonance systems

A delta-relaxation magnetic resonance imaging (DREMR) system is provided. The system includes a main field magnet and field shifting coils. A main magnetic field with a strength Bcan be generated using the main filed magnet and the strength Bof the main magnetic field can be varied through the use of the field-shifting coils. The DREMR system can be used to perform signal acquisition based on a pulse sequence for acquiring at least one of T2*-weighted signals imaging; MR spectroscopy signals; saturation imaging signals and MR signals for fingerprinting. The MR signal acquisition can be augmented by varying the strength Bof the main magnetic field for at least a portion of the pulse sequence used to acquire the MR signal.

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Toronto, Canada

Chad Tyler Harris