89 results about "Fiber tract" patented technology

The invention relates to a fiber strand (10) for an implantable supporting body (100) comprising at least two individual fibers (12). The at least two individual fibers (12) are each shorter in their longitudinal extent than the longitudinal extent (14) of the fiber strand, and in their transverse extent they are each thinner than the transverse extent (16) of the fiber strand.

A graphics processing unit implemented method for fiber tract mapping from diffusion tensor magnetic resonance imaging data includes providing a diffusion tensor magnetic resonance brain image volume, initializing a set of fiber positions in a 3D set of points, fiber displacements, and a posterior distribution for an updated fiber displacement in terms of the initial displacements and diffusion tensors, randomly sampling a set of updated fiber displacements from said posterior distribution, computing a new set of fiber positions from said initial fiber positions and said updated fiber displacements, wherein a fiber path comprises a set of fiber points connected by successive fiber displacements, accumulating connectivity values in each point of said 3D set of points by additive alpha-blending a scaled value if a fiber path has passed through a point and adding zero if not, and rendering said connectivity values.

A modular manufacturing system and methods of using are provided. The modular manufacturing system includes a plurality of manufacturing heads that perform different manufacturing processes. These heads may include multi-axial machining heads, fiber placement heads including fiber tow and fiber tape lay-up heads. The heads are fixably attachable to a single positioning system that can manipulate the various heads along a plurality of different degrees of freedom relative to a tool or material blank.

The invention discloses an antigen-free collagen aggregate and a preparation method thereof. The preparation method is characterized by comprising the following steps: with traceable animal skin or tendo calcaneus as a raw material, performing operations by the process such as fleshing, stripping fascia, degreasing, removing foreign protein and decellularizing; performing fine purification on the animal skin or tendo calcaneus, and then carrying out separation and purification on the collagen aggregate by the methods of acid fluffing, homogenizing, salting out for a plurality of times, centrifuging for a plurality of times and the like, thereby finally obtaining the antigen-free collagen aggregate. The collagen aggregate is a mixture of a collagen fiber and a collagen bundle, and has a periodic light and shade horizontal grain structure; and the space between the horizontal grains is about 67nm. The material has good biocompatibility, biodegradability, mechanical property and hemostatic performance, also has the characteristics of low antigenicity, biological activity and the like, and can be widely applied to preparation of biomedical materials such as a hemostatic material, a tissue engineering material, a biological dressing, a biodegradable medical suture and a plastic material.

An electrode array having a splayable bundle of fibers having heat-sharpened tips. A method of manufacturing an electrode array including heat-sharpening a tip of each of a plurality of fibers; and bundling the plurality of fibers. A method of implanting an electrode array into a subject, the electrode array having a bundle of fibers, the method including exposing a target in the subject for the electrode array; and inserting the bundle of fibers into the target, where forces holding the bundle of fibers together are released during the insertion thus resulting in splaying of the fibers. An electrical connection with the fibers can be formed by a conductive material, or in high-channel count designs formed by surface mounting two-dimensional amplifier arrays to a base of a fiber array.

The invention provides a confocal microscope or endoscope, having a source of coherent light for illuminating a sample, and an imaging optical fibre bundle (82) for receiving return light, whereby the fibre bundle (82) provides a return channel for fluorescent return light (78). The optical fibre bundle (82) preferably preserves, between entry and exit ends of the bundle, the relative spatial coordinates of the cores of individual fibres constituting the bundle.

The invention relates to a process for producing sheath-core staple fibre with a three-dimensional crimp, and to corresponding sheath-core staple fibre. In this process the fibre, with a symmetrical sheath-core arrangement, is extruded from two different polymer melts, with one polymer component, A, for the core and one polymer component, B, for the sheath. In order to maximize the intensity of the three-dimensional crimping in the fibre, the fibre is cooled with a sharp stream of cooling air, with a quench air velocity of at least 3 m / sec, and, after the fibres have been bundled to a tow, the multi-stage treatment takes place in a fibre line at a maximum temperature load which is below the glass transition temperature of the polymer component B in the sheath of the fibre.; In this way it is possible, after the multi-stage treatment and before the cutting of the fibre, to achieve a high degree of three-dimensional crimp.

The frame is equipped with a suction device 25 equipped with a perforation range 35 on a pair of exit rollers of a multi step drafting machine 13, and the suction device 25 provides a guiding plane for sliver to form a condensing step, set to form compact fiber strands by condensing the slivers in the condensing step, and a revolution changing device 52d is equipped on a drafting device 13 or a driving mechanism for drafting device, and revolutions of the individual roller pairs 29 become free from each other in relation to time that induces the compact fiber strands 22, 22' to receive a variable draft in time.

A method for fiber tractography processes multi-shell diffusion weighted MRI data to identify fiber tracts by calculating intravoxel diffusion characteristics from the MRI data. A transition probability is calculated for each possible path on the lattice, with the transition probability weighted according the intravoxel characteristics. Entropy is calculated for each path and the paths are ranked according to entropy. A geometrical optics algorithm is applied to the entropy data to define pathways, which are ranked according to their significance to generate a map of the pathways.

Disclosed herein is a method for producing an evolvable tissue model of a patient and, using this model, modelling physical transformations of the tissue (e.g. deformation) of the tissue model by interacting the tissue model with influence models which model interactions with the tissue such as surgical instruments, pressure, swelling, temperature changes etc. The model is produced from a set of input data of the tissue which includes directional information of the tissue. The directional information is used to produce an oriented tissue map. A tissue model is then produced from the oriented tissue map such that the tissue model reflects the directionality of the tissue component. When the tissue model is subjected to an influence that causes tissue deformation over a period of time, the tissue model directionally deforms over the period of time in a manner which reflects a trajectory of the influence interacting with the directionality of the tissue component.