155 results about "Vessel structure" patented technology

A system creates a visually (e.g., color) coded 3D image that depicts 3D vascular function information including transit time of blood flow through the anatomy. A system combines 3D medical image data with vessel blood flow information. The system uses at least one repository for storing, 3D image data representing a 3D imaging volume including vessels, in the presence of a contrast agent and 2D image data representing a 2D X-ray image through the imaging volume in the presence of a contrast agent. An image data processor uses the 3D image data and the 2D image data in deriving blood flow related information for the vessels. A display processor provides data representing a composite single displayed image including a vessel structure provided by the 3D image data and the derived blood flow related information.

An imaging system and method illuminates body tissue with infrared light to enhance visibility of a vascular structure, and generates an image of the body tissue and the subcutaneous blood vessels based on reflected infrared light. The system includes an infrared illumination source for generating the infrared light and a structure for diffusing the infrared light. The system further includes an imaging device for receiving the infrared light reflected from the body tissue and for generating an enhanced image of the body tissue based on the reflected infrared light. The enhanced image is produced by contrast enhancement techniques involving applications of an unsharp mask. The system further includes a project a projector for receiving an output signal from the imaging device and for projecting the enhanced image onto the body tissue.

A system and method to generate an illustration of a cardiac region of interest of an imaged subject is provided. The method includes generating a three-dimensional model from a series of acquired images of the cardiac region of interest; measuring a series of values of at least one functional parameter of the cardiac region of interest; generating a map of a spatial relation of the plurality of values of the functional parameter in spatial relation to the three-dimensional model of the cardiac region of interest; generating a three-dimensional model of a vessel structure leading to the cardiac region of interest; generating an output image that includes combining the three-dimensional model of the cardiac region of interest, the map of the series of values of the functional parameter, and the three-dimensional model of the vessel structure in spatial relation to one another relative to a common coordinate system.

A method and a system are disclosed for labeling an anatomical point associated with a lesion in an organ such as a lung. The method includes: a segmentation of a vessel tree anatomical structure starting from an autonomously determined initial image point; labeling the vessel segments of the vessel tree segmentation with segment labels based on a priori anatomical knowledge, thereby creating an individualized anatomical model; receiving a user-specified image point having a location from a user and locating a nearby vessel structure; tracking along the vessel structure in a direction towards a root of a parent vessel tree until a prior labeled vessel segment is encountered in the anatomical model, and assigning the label of the encountered prior labeled vessel segment from the anatomical model as an anatomical location label of the user-specified image point.

A method and apparatus for whole body bone removal and vasculature visualization in medical image data, such as computed tomography angiography (CTA) scans, is disclosed. Bone structures are segmented in the a 3D medical image, resulting in a bone mask of the 3D medical image. Vessel structures are segmented in the 3D medical image, resulting in a vessel mask of the 3D medical image. The bone mask and the vessel mask are refined by fusing information from the bone mask and the vessel mask. Bone voxels are removed from the 3D medical image using the refined bone mask, in order to generate a visualization of the vessel structures in the 3D medical image.

A microfluidic system for monitoring or detecting a change in a parameter of an input substance, which includes a microfluidic device having a tissue chamber and a tissue analog placed in the tissue chamber, wherein the tissue analog has a vessel structure mimicking naturally occurring vessel network incorporated in the tissue analog.

A system reduces artifacts introduced by patient or table motion during generation of a composite image visualizing contrast agent flow. A system for generation of a composite medical image of vessel structure, includes an imaging device for acquiring multiple sequential images of vessel structure of a portion of patient anatomy in the presence of a contrast agent. An imaging processor aligns individual images of the multiple sequential images with a single particular mask image containing background detail of the portion of patient anatomy in the absence of contrast agent. The imaging processor forms data representing multiple digitally subtracted images by subtracting data representing the single particular mask image from aligned individual images of the multiple sequential images. The imaging processor associates different individual images of the multiple digitally subtracted images with different corresponding visual attributes and combines data representing the digitally subtracted images to form a composite image. A reproduction device presents the composite image to a user.

In a method and apparatus for fully automatic detection of anomalies in vessel structures, a 3D volume data set of an imaging 3D measurement of the vessel structure is obtained and, for an evaluation device, the vessel structure is detected in the 3D volume data set and subsequently is skeletonized in order to obtain a three-dimensional course of skeletonization paths. Characteristic quantities of the vessel structure are automatically determined along the skeletonization paths as features that are significant for an anomaly to be detected, in order obtain one or more feature series. The determined feature series are classified by non-linear imaging and comparison with reference feature series that have been determined for different classes of known vessel structures that contain different anomalies and known vessel structures without anomalies. Anomalies corresponding to the classification thus are identified.

The invention provides a near-infrared imaging device and an identification method based on the palm vein and the palm print. Firstly, a palm image is obtained through a near-infrared imaging device, the central subblock sample needed to be processed is extracted, the subblock is inputted into two feature extraction modules: a genus palm print information code extraction and a vein structure extraction, then the two features are respectively matched, each own similarity of the two features is respectively calculated through using different similarity evaluation methods, the optimized weighted array of the genus palm print and the vein vessel structure is obtained according to a training sample, then the two similarities perform the similarity level fusion, then the similarity level after the fusing performs decision-making and comparing according to a scheduled threshold value, and then the final determination is obtained in reference to the fusioned matching. The near-infrared imaging device and the identification method based on the palm vein and the palm print can overcome the disadvantages of less image features and single processing, and has the advantages of improving the identification rate and the stability of the system.

Vascular conditions are detected non-invasively in the human body using a collection of acoustic information from small local regions of the vasculature. An array of accelerometers or other sensors are attached to the head or other points of interest of a patient and blood flow sounds are recorded. Vibration signatures of vessel structures such as branches, aneurysms, stenosis, etc. using random, periodic, band limited or transient analysis provides a library for further processing. The signature library is used to localize the origin of the recognized vascular feature, and the localized feature is presented to the physician in a clinically relevant manner.

A vascular graft includes a vessel structure having outer and inner wall surfaces. The vessel structure has outer and inner transverse dimensions. The vascular graft includes a fold structure which is integral with the vessel structure. The fold structure extends from the outer or inner wall surface of the vessel structure for altering the inner or outer transverse dimension thereof. A method for making the vascular graft facilitates formation of the fold structure.

A pressure vessel arranging and integrating a plurality of vessel structures each including a cylindrical liner opened at both ends and a fiber reinforced resin layer covering the outer periphery of the peripheral wall of the liner. Dome-shaped communicating members bulging outward are fixed across both respective ends of the liners of the vessel structures, thereby making the interiors of these liners communicate with each other and closing the open ends of these liners. This pressure vessel can be installed with no wasted space, and also allows an increase in capacity.

A method for optic disk detection in retinal images, includes: extracting a vessel tree from a retinal image; locating an optic disk in the retinal image using the vessel tree; enhancing a contrast of the optic disk; removing vessels from the contrast enhanced optic disk; detecting a boundary of the optic disk with vessels removed by generating an edge map; projecting the edge map at a plurality of angles by using a radon transform; and estimating a radius and center of the optic disk using the projections.

A modular graft assembly includes a main graft, a lower extender cuff and an upper extender cuff. By rotating and / or telescoping the main graft, the lower extender cuff, and the upper extender cuff relative to one another, variations in the radial and longitudinal positions of branch vessels are readily accommodated by the modular graft assembly. Accordingly, an aneurysm in a main vessel is excluded while at the same time collateral flow to branch vessels is provided. Further, custom fabrication of a graft assembly to accommodate the vessel structure of a particular patient and the associated costs are avoided.

A system, method and computer program product is provided for analyzing spectral images of a micrcirculatory system to measure the volume and concentration of a blood vessel. The images are analyzed to identify vessel structure, measure the light absorption and develop a contrast gradient plus (KGP) estimate. The KGP estimate is used to predict blood characteristics, such as hemoglobin concentration and hematocrit. The KGP is estimated in three distinct phases. First, the images are screened to measure a mean image intensity and motion blur. Second, each image is analyzed to identify background curvate, and create vessel, background and diameter masks. To identify background curvate, the images are analyzed to detect shadows caused by larger blood vessels in the background image. The diameter and area of the vessels are also calculated. During the Prediction and Calibration phase, the images are screened to eliminate all images failing thresholds for mean intensity, motion blur, background curvature and area-to-perimeter ratio. Finally, the KGP estimate is determined from the selected images.

In a method and apparatus for fully automatic detection of anomalies in vessel structures, a 3D volume data set of an imaging 3D measurement of the vessel structure is obtained and, for an evaluation device, the vessel structure is detected in the 3D volume data set and subsequently is skeletonized in order to obtain a three-dimensional course of skeletonization paths. Characteristic quantities of the vessel structure are automatically determined along the skeletonization paths as features that are significant for an anomaly to be detected, in order obtain one or more feature series. The determined feature series are classified by non-linear imaging and comparison with reference feature series that have been determined for different classes of known vessel structures that contain different anomalies and known vessel structures without anomalies. Anomalies corresponding to the classification thus are identified.

A bionic construction method of artificial organics includes: reconstructing a three-dimensional computer model of macroscopic appearance of an artificial organ, preparing a resin model close to a natural organ in shape by means of the 3D (three-dimensional) printing technique, sputtering a metal film to the surface of the resin model, depositing a micro-nano fiber structure layer, removing the resin model to obtain an artificial organ film, importing the three-dimensional computer model into a computer for materialization, designing a bionic vessel micro-channel structure, building a layered structure model, preparing bionic extracellular matrix of the artificial organic by means of the 3D printing technique, wrapping the bionic extracellular matrix with the artificial organ film, and sewing the contact edges of the two layers of the artificial organ film to obtain the artificial organ. The method is applicable to construction of the multi-scale multi-layer vessel structured artificial organic having bionic appearance and complex structure and used for cell growth.

A motion compensated digitally subtracted Angiography (DSA) image processing system includes an interface for acquiring a sequence of images of patient vessels both prior to and following introduction of contrast agent into the vessels. An image data processor automatically, (a) determines a first shift vector for a first image of the sequence for compensating for shift between the first image and a first reference image of the sequence, (b) applies the determined first shift vector to the first image of the sequence to produce a shifted image, (c) subtracts the first reference image from the shifted image to produce a subtracted image enhancing vessel structure, (d) determines a second shift vector for compensating for shift between the subtracted image and a second reference image and (e) shifts content of the subtracted image relative to the second reference image in response to the second shift vector, to provide a shifted subtracted image enhancing and aligning vessel structure.

Apparatus for distilling a fluid such as water includes a vessel and heat transfer plates within the vessel structures to form at least one each cooling channel, evaporative channel, and condensing channel. Air enters the vessel and passes through the cooling channel, where it is cooled due to evaporation taking place in an adjacent evaporative channel. In the evaporative channel, input fluid is supplied to the walls of the heat transfer plates facing into the evaporative channel and evaporation forms vapor. The vapor is condensed in a condensing channel. In some embodiments, an evaporation channel forms a vacuum chamber and a condensing channel forms a compression chamber.

The invention discloses a construction system and method of a 3D (three-dimensional) micro / nano-scale prefabricated vessel network of bone tissues, which are used for the field of bio-manufacturing and used for manufacturing a micro / nano-scale prefabricated vessel access structure by combining an electrohydrodynamics direct-writing process and a subtractive manufacturing technology. A 3D shape of a required sacrificial material is prepared by promoting the sacrificial material to form sacrificial material solution with anhydrous ethanol, no harmful substance is generated in the whole process, and the material is easily available. The micro / nano-scale vessel structure is formed by virtue of printability of PVA (Polyvinyl Acetate), PGA (propylene glycol alginate) and chitosan, and the problem that the 3D micro / nano-scale vessel network cannot be obtained through biological 3D printing is solved, therefore, the system and the method have significance for solving the problem of the scale of a vessel in repair of human tissues in clinical medicine.

Vascular conditions are detected non-invasively in the human body using a collection of information from small local regions of the vasculature, or from a specific signature or “BrainPulse” that can be derived from a patient's heartbeat-induced cranium movements. An array of accelerometers or other sensors are engaged against the head of a patient and skull movements, preferably under 100 Hz, are recorded. Vibration signatures of vessel structures such as branches, aneurysms, stenosis, etc. using random, periodic, band limited or transient analysis provides a library for further processing. The signature library is used to localize the origin of the recognized vascular feature, and the localized feature is presented to the physician in a clinically relevant manner.

The invention belongs to the gardening field, and discloses a water supplying device. The water supplying device comprises a support and a water tank fixed on the support, wherein the tank body of the water tank is provided with a water inlet pipe; a lever is hinged on the tank body; the right end of the lever is connected with a floater; the lever is connected with a water pipe plug; the water pipe plug is matched with the water outlet of the water inlet pipe; and the tank body is provided with a first drain pipe. The water supplying device disclosed by the invention can control the water delivery in the water tank through a lever-floater mechanism hinged in the water tank, and ensures that a certain amount of water is kept in the water tank all the time. As the water tank and a flower stand to be watered can form a communicating vessel structure, plants on the flower stand can be continuously watered. The water supplying device in the invention has a simple structure and low construction and management cost, is very suitable for urban utilization, is free from electric power drive, saves energy, protects environment and is applicable to large-area popularization.

A method and a CT system are disclosed for detecting and differentiating plaque in vessel structures of a patient. In at least one embodiment, a computed tomography system that is equipped with at least one focus detector system and, per focus detector system, with at least one transradiated x-ray / optical grating, is used to reconstruct the spatial distribution of the refractive index in the region of vessel structures of the patient from detected projection data. Further, at least one plaque form is highlighted in a pictorial display on the basis of a previously known value range of the refractive index for at least one plaque form.

A vessel structure for straining out various tea leaves comprises a cup type of vessel including disposal cups or various forms of vessels comprises a lid put thereon and a loader integrally or detachably mounted in the vessel to receive tealeaves thereinto and strain them with water, in which the loader comprises a tea strainer including a tea straining wall that forms a plurality of holes around the circumference wall thereof to strain tealeaves and a bottom surface that forms a plurality of holes on a predetermined area adjacent the center portion thereof in order to function as a filter for straining the tealeaves; a cover including a supporting rod projected in a predetermined distance from and formed at the center thereof to support the tea strainer cooperating with the vessel lid and / or a second extending portion extended from the upper opening circumference of the tea strainer to be closely mounted to a vessel wall; and a base portion including a plurality of projecting portions projected from around the circumference of the lower portion of the tea strainer and / or a first extending portion integrally extended from around the circular circumference of the lower portion to be closely mounted to the wall portion of the vessel. Therefore, the invention comprises a vessel structure for straining out the tealeaves including a loader integrally and / or detachably mounted therein, in which the loader is separately adaptable to a disposable cup or all kind forms of vessel in order to strain the tealeaves for instant drinking.