50 results about "Right coronary artery" patented technology

Embodiments of the invention provide an image processing method and a medical imaging device, which are applied to the technical field of image processing and improve the accuracy of recognizing images of left and right coronary arteries to some extent. The image processing method provided in the embodiment of the invention includes the steps of acquiring an original blood vessel three-dimensionalscan image; processing the original blood vessel three-dimensional scan image to obtain a designated blood vessel candidate region; processing the designated blood vessel candidate region to obtain acenter line of the designated blood vessel candidate region; acquiring, along a direction of the center line, two-dimensional slice data perpendicular to the center line at each sampling point on thecenter line; inputting the two-dimensional slice data to a trained neural network for learning and obtaining learning results; and determining a designated blood vessel image based on the plurality of learning results.

The invention provides a method and a device for dividing a coronary artery. The method comprises the following steps: (1) determining the position of an aorta in an original image, and performing reinforced filtering on the original image, thereby obtaining a reinforced filtered image; (2) obtaining the starting areas of a left coronary artery and a right coronary artery according to the position of the aorta, the original image and the gray scale of the reinforced filtered image; (3) dividing the reinforced filtered image based on at least one preset dividing threshold, obtaining a candidate area which corresponds with the preset threshold, and determining the candidate areas of the left coronary artery and the right coronary artery according to the candidate area and the starting areas of the left coronary artery and the right coronary artery; and (4) according to the position relationship between the aorta and the candidate areas of the left coronary artery and the right coronary artery, respectively screening the candidate areas of the left coronary artery and the right coronary artery, connecting the screened candidate areas with the starting areas, and obtaining the left coronary artery and the right coronary artery. The method and the device provided by the technical solution of the invention can wholly, accurately and automatically extract the left coronary artery and the right coronary artery, thereby facilitating qualitative and quantitative analysis and treatment for diseases of angiocardiopathy by a doctor.

The invention discloses a spherical space division-based coronary artery automatic segmentation and anatomic marking method. The method comprises the following steps of (1) performing image preprocessing: obtaining a coronary artery segmentation image and a central line; (2) performing a pruning operation; (3) defining a spherical center and a spherical space; (4) executing a division rule of left and right coronary arteries; (5) executing a left coronary artery anatomic naming algorithm; and (6) executing a right coronary artery anatomic naming algorithm. According to the method, a spherical coordinate system is established by taking a vessel divergence point as the spherical center through utilizing characteristics of a heart-shaped inverted cone, and the blood vessel is located and dissected in the spherical space according to anatomic shapes of branch segments of the coronary arteries and a geometric structure relationship among the anatomic shapes, so that the purposes of automatic segmentation and anatomic marking are achieved; the problems of relatively long calculation time, relatively high algorithm complexity and inaccurate branch matching caused by incapability of exhausting coronary artery distribution types in an existing coronary artery automatic segmentation and anatomic marking method are solved; and compared with a method for matching the extracted blood vessel with a prior model, the spherical space division-based coronary artery automatic segmentation and anatomic marking method has the advantages that the time is shortened, the marking is accurate, and more segments can be identified and marked.

The present invention, which addresses the needs described above, resides in an apparatus and method for coupling vascular apertures to a blood supply vessel in a manner that minimizes the time and operator dependent inconsistency in performing vascular anastomoses. In the coronary setting, this concept is fast and can be applied to both conventional and minimally invasive operative techniques. In the preferred embodiment, the present invention relates to an apparatus and method for facilitating end-to-side vascular anastomoses procedure, whereby the present invention acts as a coupling apparatus between a first, blood supplying hollow organ, e.g. the LIMA, radial artery, or a saphenous vein and the side wall of second hollow organ, typically one of the major coronary arteries, such as the left coronary artery (LCA), right coronary artery (RCA) or the circumflex (CX).

The invention discloses an in-vitro training and testing system for percutaneous coronary interventional surgery. The in-vitro training and testing system comprises an operation platform, a constant-temperature box, a display, a sealed constant-temperature blood collecting box and a heart simulating device, wherein the constant-temperature box simulates the in-vivo environment of a human body, andthe display is connected with the constant-temperature box; the heart simulating device comprises a sealed rigid container, a piston communicated with the rigid container and a heart model arranged in the rigid container; the heart model is connected with an aorta model and a right pulmonary vein simulating pipeline communicated with the blood collecting box; left and right coronary artery modelsare connected to one end of the aorta model, and the far end of each coronary artery model is communicated with the blood collecting box through a silica-gel soft tube; the other end of the aorta model is communicated with one end of an artery simulating tube, the other end of the artery simulating tube is communicated with one end of a femoral artery blood vessel simulating section, and the other end of the femoral artery blood vessel simulating section is communicated with the blood collecting box. The in-vitro training and testing system has the advantages that the interventional surgery scene is restored, the surgery learning time of doctors is shortened, and the operation level of the doctors can be improved.

Provided is a catheter suitable for catheterization of a right coronary artery using a right transradial approach. The catheter presents improved directionality, thereby requiring minimized external torque to be applied during insertion and diagnostic procedures. A catheter according to the disclosed design includes a tip near its distal end, a primary curve, a secondary curve, a tertiary curve and a proximal end accessible external a catheterized body. When properly inserted, the secondary curve may rest near the junction of the bracheocephalic trunk and the right subclavian artery, and the tertiary curve may rest in the superior curve of the right subclavian artery. In addition to improved directionality, the secondary and/or tertiary curve offers additional resistance against cephalic, or upward, back-up force by providing caudal, or downward, torque to more distal portions of the catheter body.

The invention discloses a fast-switching and mapping catheter, and a preparation method and an application method thereof in order to realize the fast mapping of electrocardiosignals in a coronary artery. The fast-switching and mapping catheter is characterized in that an inner catheter and an outer catheter are welded and connected at the end part on the far end, the lateral side on the near end of the outer catheter is provided with a thread hole, the thread hole and the port on the near end of the inner catheter are welded and connected, and the end part on the far end of the outer catheter is provided with a ring electrode. The preparation method comprises the following steps: preparing the outer catheter, preparing the inner catheter, welding the two ends of the inner catheter and the outer catheter, assembling wires on the ring electrode, welding a stainless steel tube and the outer catheter, and assembling joints. Compared with the prior art, the invention utilizes the thread having a small diameter to transfer the catheter into the far-end mapping position, thereby greatly shortening the operation time; and electrophysiological mapping can be carried out on descending anterior branches and circumflex branches of the epicardial coronary artery and the inside of the right coronary artery, thereby providing help for the radio-frequency ablation operation on patients of which the ventricular tachycardia is focused on the epicardial myocardium, and providing a more precise basis for accurate positioning during the operation.

The invention provides a device for analyzing cardiovascular and cerebrovascular characteristics and blood characteristics and a detecting method, belonging to the field of medical equipment. The device comprises a pressure pulse wave sensor, a carotid artery and vertebral artery rheogram inductance electrode, an electrocardiogram inductance electrode, a cardiophonogram sensor, a signal receiver, a main processor and an in-out part. The device can realize the cardiovascular and cerebrovascular noninvasive detection, and biomechanically analyzes each branched blood vessel of the cardiovascular and cerebrovascular system by measuring the blood pressure and the blood flow volume of a left cervical vertebra artery, a right cervical vertebra artery, a cerebrum front artery, a cerebrum middle artery, a cerebrum back artery, a left coronary artery and a right coronary artery, obtains biomechanics indexes such as the elasticity coefficient, the compliance, the blood resistance, the blood flow volume and the like of each branched blood vessel of the cardial blood vessel and the brain blood vessel, has an important significance for the early diagnosis of the myocardial infarction and the cerebral thrombosis by taking as equipment for the cardiography, the magnatic resonance imaging MRI, the CT and the like and supplementary equipment between the TCD and the ECG.

The invention discloses a coronary artery narrow model and making method. Its uses surgery suture method or ligation coronary artery method to make models with serial for left and right coronary artery on any positions. It can be used in coronary artery imaging, coronary artery narrow, coronary artery tissue research, particularly for the research in medical imaging science.

The invention discloses a valved homograft conduit, which comprises an artificial blood vessel and an artificial valve. The artificial blood vessel is provided with a near end to a heart and a far end to the heart, and the artificial valve is located at the near end to the heart of the artificial blood vessel. A left opening and a right opening are arranged on the lateral wall of the artificial blood vessel at the positions close to the artificial valve, and the positions of the left opening and the right opening correspond to openings of a left coronary artery and a right coronary artery. The valved homograft conduit further comprises a hard homograft conduit which is communicated with the artificial blood vessel and is ligatured with an aorta through a ligation belt, wherein the hard homograft conduit comprises a hard homograft conduit of the near end to the heart, the hard homograft conduit of the near end to the heart is located between the left opening, the right opening and the far end to the heart and is close to the near end to the heart of the artificial blood vessel. A space is formed between the ligation position and an aortic valve, and blood not only is supplied to a whole body along the artificial blood vessel, but also flows into the space through the openings, and further is supplied to the left coronary artery and the right coronary artery. The openings and the coronary arteries are not needed to be sutured, and the bleeding probability of an anastomotic stoma is reduced.

The invention discloses a coronary artery segmentation method based on a CTA image. Firstly, non-coronary tissues are effectively inhibited through image preprocessing, and the contrast ratio of coronary arteries and background is improved; secondly, an irregular ascending aorta layer with coronary artery bifurcations is detected in combination with an optical flow method and heart anatomical structure priori knowledge, and manual initialization of starting points of left and right coronary arteries is avoided; and finally, compared with a traditional region growing method, the provided self-adaptive region growing method combined with endpoint detection has better segmentation capability and accuracy for fine branches with uneven gray levels and complex topological structures.

The invention discloses a coronary artery recognition method and device. One embodiment of the method comprises the following steps: acquiring two quasi-center lines of a coronary artery; calculatingthe minimum distance from each measurement point on the two quasi-center lines to the left ventricle, the left atrium, the right ventricle and the right atrium respectively to obtain a first distance,a second distance, a third distance and a fourth distance correspondingly; sorting the first distance, the second distance, the third distance and the fourth distance corresponding to each measurement point from small to large; selecting left coronary artery feature points and right coronary artery feature points from all the measurement points on the two quasi-center lines based on the sorting result of each measurement point, and counting the number of the left coronary artery feature points and the right coronary artery feature points on each quasi-center line; and determining whether thecoronary artery corresponding to the quasi-center line is the left branch or the right branch based on the number of the left coronary artery feature points or the number of the right coronary arteryfeature points. Therefore, the accuracy of coronary artery left and right branch identification is improved.

The invention relates to an image analysis method, computer equipment and a storage medium. The image analysis method comprises the steps of: acquiring coordinates of coronary artery origin points ina coronary artery angiography image to be analyzed according to the coronary artery angiography image to be analyzed and a preset origin point detection model, wherein the coordinates of the coronaryartery origin points comprise the coordinates of the left coronary artery origin point and the coordinates of the right coronary artery origin point; acquiring an ascending aorta segmentation image corresponding to the coronary angiography image to be analyzed according to the coronary angiography image to be analyzed, and extracting a central line of an ascending aorta of the ascending aorta segmentation image; analyzing the coronary angiography image to be analyzed according to the coordinates of the left coronary artery origin point, the coordinates of the right coronary artery origin pointand the central line of the ascending aorta to obtain an analysis result, wherein the analysis result is used for representing whether the coronary artery origin in the coronary angiography image tobe analyzed is abnormal or not. By adopting the image analysis method, the efficiency of analyzing whether the coronary artery origins in the coronary angiography image to be analyzed is abnormal or not can be improved.

In a method and apparatus for contrast-enhanced magnetic resonance (MR) angiography of the right coronary artery of a patient, a bolus of MR contrast agent is selected to have a size that will cause the bolus, after injection into the patient, to wash out of right coronary chambers of the heart while still enhancing MR signals from the right coronary artery. The bolus of MR contrast agent is injected into the patient, and MR signals are generated in, and MR signals are obtained from, the patient in a time window after the bolus has washed out of the right coronary chambers and still enhances MR signals in the right coronary artery. An MR image of the right coronary artery is generated using only the MR signals obtained in the time window.

The present invention relates to a hemostasis valve device which allows a wire or a catheter to be inserted into the left or right coronary artery via the femoral artery or an arm artery when a Cardiac Catheterization or Percutaneous Transluminal Coronary Angioplasty operation is performed, wherein two independent sealing members are opened and closed by press and release actions of push buttons coupled to a body and the rotation of a fastening tube, respectively, so that the leakage or blood or the inflow of outside air is simply and effectively blocked during the operation, and a drug influx tube for allowing a medicine such as a thrombolytic drug to flow into a patient during the operation pivots and is adjusted in a stepwise manner within a certain range of angles according to body conditions or movements of the patient.

Apparatus, kits and methods for flaring an end of a stent that can then be placed within the ostium of a vessel are disclosed. Areas in which ostial stents with flared ends could be used may include, e.g., the left main artery, renal arteries, sub-clavian artery, right coronary artery, circumflex artery, et al.

The embodiment of the invention discloses a CT image processing method and device. The method comprises the steps that a CT image is acquired, and the parameters of the CT image coronary arteries in the CT image are identified and determined, wherein the CT image coronary arteries includes a CT image left coronary artery and a CT image right coronary artery; the CT image coronary artery types of the CT image coronary arteries are determined according to the parameters of the CT image coronary arteries, wherein the CT image coronary artery types include a left advantage and a right advantage; different segments different from a preset coronary artery model are determined according to the preset CT image coronary artery model; and the parameter indexes of the different segments are calculated according to a preset score table. According to the CT image processing method and device, different segments different from the preset coronary artery model are determined according to the preset CT image coronary artery model, different parts can be automatically identified and different characteristics can be analyzed so that the scoring difficulty can be reduced and scoring time can be shortened; besides, the parameter indexes of the different segments are calculated according to the preset score table so that user reference is facilitated, and the accuracy of the scoring result can be enhanced.

The present invention is related to a method for reconstruction of the coronary arteries and an examination apparatus for reconstruction of the coronary arteries. To provide improved coronary artery information, an apparatus and a method are provided where a gating signal is provided (32) and a first gated X-ray image sequence of one of the left or right branches of the coronary arteries is acquired (34) with injected contrast agent into the one of the left or right branches of the coronary arteries. Further, a second gated X-ray image sequence of the other branch of the coronary arteries is acquired (36) with injected contrast agent into said other branch. Then, a gated reconstructing (38) of the left and the right coronary artery is suggested and a volume data (40, 42) of the coronary arteries is generated. The volume data of the left and right coronary arteries is registered (44) in relation to time and space. Further; the registered volume data (48, 50) of the left and the right coronary arteries is combined and a combined coronary artery tree volume data set (52) is generated (54). Finally, the combined coronary tree volume data set is visualized (56).

The invention discloses a coronary artery projection image generation method and device and a computer readable medium. One embodiment of the method comprises the following steps: acquiring a coronaryartery computed tomography angiography (CTA) sequence image; carrying out segmentation processing on the coronary artery CTA sequence image to generate two connected region images; identifying the two connected region images to generate a left coronary artery three-dimensional segmentation image and a right coronary artery three-dimensional segmentation image; and performing image projection processing on the left coronary artery three-dimensional segmented image and the right coronary artery three-dimensional segmented image to generate a left coronary artery tree two-dimensional image and aright coronary artery tree two-dimensional image. According to the invention, the left coronary artery CTA sequence image can be processed by the artificial intelligence model to generate the left coronary artery three-dimensional segmentation image and the right coronary artery three-dimensional segmentation image; therefore, maximum density projection is generated for the left coronary artery tree and the right coronary artery tree, interference of other tissues or blood vessel branches on coronary arteries is eliminated, and doctors can observe related problems of disease diagnosis such asblood vessel bifurcation, calcification or stenosis.

The present invention discloses one gate controlled electrocardiographic image collecting method with reduced coronary artery motion fake image. It performs gate controlled electrocardiographic image acquisition in the lowest motion speed inside the heart beat period of the right coronary artery. The present invention obtains satisfactory image quality and has no coronary artery motion fake image radically.

The invention provides an image processing method and device, and the method comprises the steps of obtaining an aorta key layer based on a coronary artery origin image, and enabling the aorta key layer to comprise an aorta region, a first coronary artery connected domain, and a second coronary artery connected domain; establishing a first preset coordinate system by taking the central point of the aorta region as an original point; based on a first coordinate axis in the first preset coordinate system, determining coordinates of a left coronary artery origin point and coordinates of a right coronary artery origin point, wherein the right coronary artery origin point is the center point of the first coronary artery connected domain, and the left coronary artery origin point is the center point of the second coronary artery connected domain; and based on the coordinate of the left coronary origin point and the coordinate of the right coronary origin point, obtaining a determination result, wherein the determination result is used for determining whether the coronary origin of the coronary origin image is abnormal. According to the technical scheme, the left coronary origin point and the right coronary origin point can be quickly and accurately positioned, and the coronary origin abnormity judgment efficiency is improved.