143 results about "Coronary vessel" patented technology

Method and apparatus for detecting and analyzing heart mechanical activity at a region of interest of a patient's heart are provided. The method comprises acquiring a time sequence of 2-dimensional X-ray images of a region of interest over at least part of a cardiac cycle; detecting coronary vessels in the X-ray images; tracking the coronary vessels through the sequence of images to identify movements of the coronary vessels; and analyzing the movements of the coronary vessels to quantify at least one parameter characterizing heart wall motion in the region of interest.

A method for segmenting coronary vessels in digitized cardiac images includes providing a digitized cardiac image, providing a seed point in the image, selecting a volume-of-interest about the seed point, performing a local segmentation in the volume-of-interest, including initializing a connected component with the seed point and a threshold intensity value to the intensity of the seed point, adding a point to the connected component if the point is adjacent to the connected component and if the intensity of the point is greater than or equal to the threshold value, lowering the threshold intensity value, and computing an attribute value of the connected component, wherein if a discontinuity in the attribute value is detected, the local segmentation is terminated, wherein a local segmentation mask of a vessel is obtained.

The invention, which is applicable to the field of the computer technology, provides a three-dimensional reconstruction method and device for coronary vessels, equipment and a storage medium. The method comprises: carrying out pretreatment and extraction of a blood vessel edge contour and two-dimensional guide wires on a coronary artery angiography (CAG) image and carrying out inner and outer membrane segmentation on an IVUS image; carrying out translation of two-dimensional guide wires in the CAG image on a first radiography plane and a second radiography plane to a same starting point, constructing a vertical intersecting surface, and setting intersecting lines as three-dimensional guide wired; arranging each frame of IVUS image on the three-dimensional guide wire at equal interval and rotating the each frame of IVUS image to be perpendicular to a tangent vector at a corresponding position; and rotating the IVUS image on the tangent vector vertical plane and carrying out back projection to the CAG image, obtaining distances between the three-dimensional guide wires based on the back projection and the blood vessel edge contour, determining an optimal orientation angle, and then rebuilding a blood vessel surface. Therefore, the external morphological structure of the blood vessel and the inner cavity lesion information are checked simultaneously; and the efficiency and accuracy of three-dimensional reconstruction of the coronary vessel are improved.

A method and apparatus for temporarily immobilizing a local area of tissue. In particular, the present invention provides a method and apparatus for temporarily immobilizing a local area of heart tissue to thereby permit surgery on a coronary vessel in that area without significant deterioration of the pumping function of the beating heart. The local area of heart tissue is immobilized to a degree sufficient to permit minimally invasive or micro-surgery on that area of the heart. The present invention features a suction device to accomplish the immobilization. The suction device is coupled to a source of negative pressure. The suction device has a series of suction ports on one surface. Suction through the device causes suction to be maintained at the ports. The device further is shaped to conform to the surface of the heart. Thus, when the device is placed on the surface of the heart and suction is created, the suction through the ports engages the surface of the heart. The suction device is further fixed or immobilized to a stationary object, such as an operating table or a sternal or rib retractor. Thus, the local area of the heart near the suction device is temporarily fixed or immobilized relative to the stationary object while suction is maintained. In such a fashion, the coronary artery may be immobilized even though the heart itself is still beating so that a bypass graft may be performed. In addition the suction device may be used in either a conventional, open-chest environment or in a minimally-invasive environment, e.g. endoscopic.