2 results about "Blood vessel visualization" patented technology

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.

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