11 results about "Blood vessel visualization" patented technology

The invention provides a real-time processing method for endoscopic image blood vessel enhancement and microcirculation evaluation, which comprises the following steps of: processing an original endoscopic image, and locally enhancing a brightness channel through a contrast-limited adaptive histogram equalization technology; self-adaptive frequency domain-space domain decomposition is realized based on local texture complexity analysis; performing multi-scale Hessian matrix blood vessel detection on the low-frequency component; applying a directional Gabor filter bank to the high-frequency component; spatial-temporal feature fusion is realized through multi-resolution pyramid optical flow calculation; synchronously completing blood vessel probability prediction, blood vessel diameter estimation and blood flow direction prediction by using a lightweight multi-task deep learning network; the blood flow velocity is analyzed and calculated based on a speckle mode, the perfusion density is subjected to accelerated statistics through an integrogram, and vascular morphological parameters are extracted by adopting an improved skeleton algorithm. According to the invention, an enhanced blood vessel visualization effect and a real-time microcirculation quantitative evaluation function can be provided, and the overall improvement of the endoscope image processing quality and efficiency is realized.

The invention discloses a field operation portable low-light puncture infusion guide system which comprises a multispectral imaging module used for collecting an image containing a plurality of spectral bands by utilizing the penetrating power and reflection characteristic difference of light rays with different wavelengths to human tissues; the near-infrared blood vessel sensor is used for acquiring the contour and the position of a blood vessel; the low-light sensor is used for converting the optical signal into an electric signal based on a photomultiplier or a CMOS (Complementary Metal Oxide Semiconductor) low-illumination imaging technology and generating a low-light image through amplification and noise reduction processing; the image fusion processor is used for carrying out image fusion on the blood vessel image and the low-light-level image based on a feature-level or pixel-level image fusion algorithm; the AR display module is used for superposing a virtual image which is generated by image fusion and contains the position and the direction of the blood vessel into a real scene; the method has the advantages that the multispectral imaging technology and the low-light sensing technology are combined, richer tissue information is obtained, the limitation of a single imaging mode in the low-light environment is solved, and the blood vessel visualization effect is improved.

Provided are a computer program, a blood vessel visualization device, a blood vessel visualization system, and a blood vessel visualization method capable of determining the necessity of avascularization when executing puncture.　The computer program causes a computer to execute processing that includes: irradiating a prescribed site on a subject with measurement waves to acquire blood vessel information of the prescribed site; specifying the state of a blood vessel on the basis of the acquired blood vessel information; and outputting determination results with respect to the necessity of avascularization, on the basis of the specified state of the blood vessel.

A system for providing an image representation of an occluded blood vessel is provided. The system includes one or more processors configured to: detect a portion (140p, 140d) of the blood vessel that adjoins the blockage (130) in a sequence (120) of angiographic images; extracting a motion vector (150) from the sequence (120) of angiographic images based on the detected portion of the blood vessel, the motion vector representing motion of the portion (140p, 140d) of the blood vessel; registering the sequence (120) of angiographic images to each other based on the extracted motion vectors (150); processing image intensities in a sequence of mutually registered angiographic images in a region of interest adjacent to the portion (140p, 140d) of the blood vessel to provide an image representation of the occluded blood vessel; and outputting an image representation of the occluded blood vessel.

This application provides a method and apparatus for real-time VR blood vessel display based on low-latency virtual-real fusion. It achieves accurate real-time solution of the head pose transformation matrix through lightweight neural network feature point extraction and perspective multi-point localization algorithms. A low-latency transmission mechanism is constructed, combining row buffer triggered piecewise encoding and pose deviation affine distortion correction to establish a reliable vascular image latency compensation strategy. Fusion rendering optimization is introduced, using thin-plate spline surface adaptation and staged adaptive transparency mixing to ensure continuous improvement of the virtual-real fusion display. This method effectively solves the shortcomings of traditional technologies in pose alignment, low-latency transmission, and surface fusion rendering, providing technical support for real-time VR blood vessel visualization.

The invention discloses a water-soluble tetrasulfonic aza boron fluoride dipyrrole near-infrared fluorescent dye as well as a preparation method and application thereof. The fluorescent dye has the following structure: R is selected from-(CH2) nSO3-, and n is an integer greater than or equal to 2 and less than or equal to 6. The water solubility is remarkably improved through tetrasulfonic acid group modification, the fluorescent probe shows high fluorescent brightness in a water solution, the maximum emission wavelength is about 725 nm, the fluorescent probe is located in a biological tissue optical window, and high-contrast imaging of deep tissue is facilitated. Compared with clinical indocyanine green (ICG), the water solubility, the fluorescence quantum yield and the light stability are remarkably improved, the molar extinction coefficient is high, and the photobleaching rate is low; the synthesis route is simple, the repeatability is good, the product is easy to purify, and the biocompatibility is good. The dye is applicable to real-time navigation, tumor imaging and blood vessel visualization in fluorescence-guided surgery, and shows excellent clinical application potential and industrialization prospect.

The invention provides methods and systems for correcting translational distortion in a medical image of a lumen of a biological structure. The method facilitates vessel visualization in intravascular images (e.g. IVUS, OCT) used to evaluate the cardiovascular health of a patient. Using the methods and systems described herein it is simpler for a provider to evaluate vascular imaging data, which is typically distorted due to cardiac vessel-catheter motion while the image was acquired.

FIELD: neurosurgery and neurology.SUBSTANCE: after surgical access, a vessel located on the surface of the tumor tissue and extending into adjacent areas of the cortex is visualized. On both sides of the vessel, a bipolar electrode is used to coagulate the areas of the cortex affected by the tumor. Then, using microscissors, the arachnoid membrane is opened in the area of coagulation zones. An encephalotomy is performed. Next, subpial resection of the tumor in these areas is performed using an ultrasonic destroyer-aspirator, preserving the arachnoid membrane in which the preserved vessel passes. When visualizing a vessel located deep in the groove, dissection of the groove is performed while preserving the arachnoid membrane in which the vessel passes. The tumor around the vessel is resected using an ultrasonic destroyer-aspirator. In this case, first the part of the tumor on one side of the vessel is resected, then the part on the other side. These resection areas are connected to each other under the vessel. Then the residual tumor fragments on the vessel are removed. When visualizing a vessel passing through a tumor to healthy areas of the brain, this vessel is preserved, and the tumor tissue is separated from it along the periphery using an ultrasonic destroyer-aspirator. During the isolation of cortical and subcortical vessels, they are irrigated with saline solution. Then, through the resulting “intervascular windows,” deeply located tumor fragments are removed.EFFECT: method allows for the preservation of blood flow in cortical vessels during the removal of glial brain tumors, reducing the risk of developing ischemic complications in functionally significant areas of the cortex adjacent to the tumor resection zone, as well as in the subcortical structures of the brain, which, as a consequence, is associated with lower risks of developing postoperative neurological deficit.1 cl, 3 ex

The utility model discloses an anoscope with a blood vessel imaging function. The anoscope comprises an anal tube, a guide inner plug, a pen type imaging device, a control host and a display device. An operation outlet is formed in the head end of a tube body of the anal tube, an operation inlet is formed in the tail end of the tube body of the anal tube, and an operation handle is connected to one side of the operation inlet. The guide inner bolt comprises a conical head, a connecting rod and a pressing end which are connected in sequence; the conical head is configured to be matched with the operation outlet in shape; the pen type developer comprises a pen head part and a pen holder part which are connected in sequence; the pen head part is provided with an infrared lamp holder and a camera; the pen holder part is detachably mounted on the operating handle; the control host is in signal connection with the infrared lamp holder and the camera. The display device is in signal connection with the control host. The anoscope can be used for developing the vein blood vessel in the anus, so that the success rate of anus intravenous injection is improved, and the treatment experience of a patient is improved.

A blood vessel visualization member for visualizing a blood vessel of a living body includes: a sheet body that is affixable to a surface of a site to be visualized, the sheet body including: a wavelength converter including a wavelength conversion material that converts near-infrared light into visible light, and an adhesive portion provided on the wavelength converter.

A puncture system includes: a blood vessel visualization device configured to display a blood vessel visualized image in which a blood vessel of a living body is visualized; and a puncture tool including a marker. The blood vessel visualization device is configured to: acquire a marker state in the puncture tool, and specify a display mode of a blood vessel visualized image based on the acquired marker state.