8 results about "Small vessel" patented technology

Some embodiments of a rotational atherectomy device can remove (partially or completely) stenotic lesions in blood vessels by rotating one or more abrasive elements in an orbital path to abrade and breakdown the lesion. In particular implementations, multiple abrasive elements are arranged along a distal portion of a drive shaft with an improved configuration so as to facilitate both efficient navigation into smaller blood vessels below the ankle or in the heart and effective orbital paths for abrading stenotic material in such smaller vessels.

A lightweight 3D attention-based dual-path U-Net segmentation method for lung CT vessels, belonging to the field of medical image processing technology, solves the problems of low accuracy and poor segmentation of small vessels due to loss of key information when using existing techniques for vessel segmentation. The key technical points of this invention are: acquiring the image to be segmented, labeling and preprocessing the image, extracting the largest connected region of the image, constructing a DS-ResUNet network, training the DS-ResUNet network, inputting the image into the trained DS-ResUNet network, and outputting a predicted image, which is the result of dual-path U-Net segmentation of lung CT vessels. This invention is applicable to the segmentation of lung CT vessels.

This disclosure provides a measurement system and method for the pathological features of hypertensive retinopathy. The measurement system includes: an acquisition module that acquires fundus images; a partitioning module that receives the fundus images and identifies and partitions the optic disc region; a segmentation module that uses an arteriovenous segmentation model to segment the fundus images into arteries and veins to obtain a three-valued image of the segmentation results. The arteriovenous vessel marking results include arterial and venous marking results formed by marking the boundaries of vessels with diameters larger than a preset vessel diameter in the training fundus images, and small vessel marking results formed by marking the course of vessels with diameters not larger than the preset vessel diameter. The measurement module measures the pathological features of hypertensive retinopathy in the fundus images based on the vessels larger than the preset vessel diameter in the partitioning and segmentation results. This disclosure enables efficient and objective measurement of the characteristics of hypertensive retinopathy.

FIELD: otorhinolaryngology.SUBSTANCE: under endotracheal anesthesia, an endoscope equipped with optics and an instrument for removing pathological contents of the maxillary sinus are inserted into the nasal passage. The inferior nasal concha is displaced medially using a raspatory. Then, stepping back from the edge of the piriform opening by 1.5–2.0 cm in the caudal direction, a mucoperiosteal flap of the lateral wall is separated in the lower nasal passage. The mucoperiosteal flap is displaced posteriorly, exposing the bone skeleton in the projection of the inferomedial angle of the maxillary sinus. Next, using a cold plasma coblator, in ablation mode, the mucous surface of the bone skeleton is evaporated for 2–3 seconds, followed by coagulation of small vessels. Then, a bone valve measuring 10–15 mm is formed from the exposed bone skeleton. The bony valve is retracted in the caudal direction, forming an antrostomy. A 70-degree endoscope is inserted through the formed antrostomy and the pathological contents of the sinus are visualized. In this case, if the cyst is visualized with a coblator in ablation mode, the cyst is evaporated along with its contents, and the remaining cyst is captured and removed. If a polyp is visualized, the polyp stalk is first evaporated, and then the remaining part of the polyp is removed. If a foreign body is visualized, it is removed with forceps. In this case, if the foreign body is encapsulated or located in the thickness of the mucosa, a coblator in ablation mode evaporates part of the mucosa until the foreign body is exposed, and then removed. Next, the sinus cavity is washed with saline solution. The antrostomy is closed with a bone flap. The formed mucoperiosteal flap is placed back in its original place.EFFECT: method allows for endoscopic endonasal removal of pathological contents from the maxillary sinuses with a minimal risk of cyst / polyp recurrence and postoperative complications, reduced blood loss during surgery, shortened surgical time, postoperative rehabilitation periods, and temporary disability.3 cl, 3 ex

The invention discloses a coronary artery segmentation method based on physical constraint and topological correction, which comprises the following steps: firstly, preprocessing a coronary artery CTA image through standardization strategies such as resampling, intensity truncation and normalization to generate a golden standard topological graph; then, a deep learning model containing global-local mixed feature extraction, graph neural network topology reasoning and physical perception of flow resistance loss is constructed, CNN and Swin Transform are utilized in parallel to extract features, a multi-scale tubular perception unit is introduced to enhance small blood vessel response, GCN is utilized to predict blood vessel topology fracture, and the blood vessel topology fracture is corrected through micro layering; finally, a flow resistance loss function based on the Poiseuille law is utilized, the network is forced to conform to fluid mechanics connectivity in training, high-precision and function-reliable segmentation can be output in complex scenes such as calcification and low contrast without manual post-processing, and the efficiency and the automation level of CT-FFR analysis are remarkably improved.

The present subject matter provides, inter alia, compositions, formulations, and methods for inhibiting, treating, and preventing small vessel diseases.

1. The name of the design product: the lures boat (export version). 2. The use of the design product: small boats for lures fishing activities in the ocean, lakes, reservoirs and other water areas. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.