6 results about "Mri compatible" patented technology

The invention discloses an additive manufacturing zirconium alloy magnetic susceptibility prediction method based on a convolutional neural network, and belongs to the technical field of material performance prediction and intelligent manufacturing. The method comprises the following steps: firstly, preparing a plurality of groups of zirconium alloy samples with different process parameters through an electron beam powder bed melting process; secondly, performing X-ray diffraction analysis on the sample to obtain normalized diffraction intensity data of each crystal face, and measuring the magnetic susceptibility of each crystal face; thirdly, constructing a convolutional neural network model, and performing model training by taking the normalized diffraction intensity data and the phase composition data as input features and the magnetic susceptibility as an output label; and finally, predicting the zirconium alloy magnetic susceptibility under unknown process parameters by using the trained model. According to the method, the CNN model reveals that the crystal orientation is a leading factor influencing the magnetic susceptibility under the condition that the material components are the same, efficient and accurate prediction of the magnetic susceptibility of the zirconium alloy is realized, and a new way is provided for design and optimization of an MRI compatible implant material.

A steerable surgical apparatus comprises a steerable surgical tubular needle, a needle manipulation apparatus with multiple actuators (permitting adjustment of needle rotation, translation, and bending), fiducial markers affixed to the needle manipulation apparatus, encoders configured to sense movements initiated by actuators, and a control unit. The needle manipulation apparatus is devoid of ferrous materials, and is configured to be placed and operated within an MRI machine bore. The control unit determines position and orientation for: (i) the needle manipulation apparatus relative to the MRI machine bore, such as by MRI imaging of the fiducial markers, and (ii) the needle inserted into a patient within the MRI machine bore, such as by kinematics utilizing signals of the encoders.

A medical system for performing a therapeutic function on a patient comprises an implantable medical device having a switching function to switch from a normal operating mode to an MRI compatible operating mode in the presence of an MRI device, and an external device for programming at least one setting of the implantable medical device. The external device is configured, based on a programming event relating to said at least one setting, to generate a notification prompting a user to confirm a continuing MRI compatibility of said MRI compatible operating mode after the programming event and / or to amend said at least one setting for achieving MRI compatibility.

This invention relates to the field of medical devices, specifically to an MRI-compatible implantable electrode and its manufacturing method. A base layer and a shielding mesh are disposed on the outer periphery of the catheter. The shielding mesh is formed by patterning a metal layer and is thinner than existing braided shielding sleeves. Along the axial direction of the catheter, the elastic modulus of the shielding mesh is less than that of the base layer, and the elastic limit elongation of the shielding mesh is greater than that of the base layer. The shielding mesh is more flexible than the base layer and can withstand greater stretching and bending. The base layer protects the shielding mesh from external forces, making it less prone to breakage. The elastic modulus of the base layer is less than that of the catheter. Overall, the shielding layer has greater ductility than the catheter, and is more elastic than the catheter.

A multifunctional fiber probe capable of optical, electrical, and chemical interrogation of neuronal brain circuits in vivo is disclosed. The fiber probe may include an optical waveguide to enable optogenetic stimulation and / or fiber photometry, one or more electrodes for electrical recording and / or stimulation, and a microfluidic conduit to deliver at a drug, a gene, and / or a chemical to a mammalian subject. The fiber probe may be MRI compatible. The fiber probe may have a minimal footprint and enhanced bio-compatibility due to its flexible materials, resulting in reduced inflammation relative to conventional deep brain stimulation probes. The fiber probe may allow for multisite optical, electrical, and viral perturbations and electrophysiological and photometric recordings.

The disclosure relates to methods of imaging a portion of a body vessel using magnetic resonance imaging (MRI), methods of performing interventional medical treatment under MRI, interventional medical devices, such as wire guides, useful in performing treatment under MRI, and methods of making interventional medical devices. A method of imaging a portion of a body vessel of a patient using MRI includes advancing through a body vessel an end of a wire guide comprising a continuous metal core member and a continuous jacket disposed over the entire core member through a body vessel and scanning the portion of the patient that is positioned within an MRI scanner and that includes a portion of the body vessel within which the end of the wire guide is disposed. A secondary medical device, such as a catheter, can be disposed over the wire guide and manipulated in the method.