9 results about "Left ventricular myocardium" patented technology

Disclosed are a method for presenting cardiac myocardial strain and an ultrasound imaging apparatus, comprising: acquiring image data of myocardial segments of both left and right ventricles, and processing this data to obtain motion parameters of both left and right ventricular myocardial segments. A composite bull's-eye plot containing left and right ventricular bull's-eye subplots is displayed, wherein the left ventricular bull's-eye subplot comprises multiple left ventricular myocardial regions corresponding to the left ventricular myocardial segments and presenting motion parameters of the left ventricular myocardial segment; and the right ventricular bull's-eye subplot comprises a right ventricular myocardial region corresponding to the right ventricular myocardial segments that exclude some / all shared segments with the left ventricle and presenting motion parameters of the right ventricular myocardial segment. This configuration enables users to observe motion parameters of both ventricular myocardial segments, thereby providing comprehensive understanding of cardiac myocardial strain while enhancing clinical efficiency for doctors.

To provide suitable devices, systems, and methods for percutaneous pneumatic cardiac support. [Solution] The cardiac support system includes a pneumatic effector implanted beneath the pericardium and across the myocardial surface covering the patient's left ventricle. A port receives an implanted, percutaneously introduced cannula. The port is connected to supply the drive gas received from the cannula to the pneumatic effector. An external drive unit includes a pump assembly and a control circuit that operates the pump to activate the pneumatic effector in response to the patient's sensed cardiac rhythm. A connecting tube has a pump end connected to the pump and a percutaneous port connection end attached to the implantable port.

The application provides a cardiac phase judgment device, method, medium and electronic equipment. The device comprises: a medical image acquisition module, configured to acquire a plurality of three-dimensional medical images of a target object in at least one cardiac cycle; a myocardial wall thickness acquisition module, configured to acquire the thickness of a left ventricular myocardial wall in each frame of the three-dimensional medical images; and a cardiac phase judgment module, configured to acquire the cardiac phase of the target object according to the thickness of the left ventricular myocardial wall in each frame of the three-dimensional medical images. The cardiac phase judgment device only needs to acquire the cardiac phase of the target object according to the three-dimensional medical images of the target object, and is simpler to implement.

The application discloses a left ventricular myocardium curved surface registration method based on two-dimensional parameter domain mapping. The method comprises the following steps: segmenting and reconstructing a dynamic three-dimensional curved surface sequence of left ventricular myocardium from a cardiac magnetic resonance short-axis image sequence, and then performing standardization processing on the dynamic three-dimensional curved surface sequence to obtain a target curved surface model; mapping a key frame curved surface in the target curved surface model to a pre-defined two-dimensional parameter domain to obtain global deformation parameters; and mapping the remaining frames of the target curved surface model in the whole cardiac cycle to the two-dimensional parameter domain according to the global deformation parameters. The method drives the mapping process of the whole sequence by using the global deformation parameters of a key frame curved surface, can establish stable space-time vertex corresponding relationships for the curved surfaces of all time frames on the two-dimensional parameter domain, realizes time sequence alignment of the curved surface sequence in the whole cardiac cycle and normalized registration of myocardium shapes among different cases, can effectively solve problems such as large shape difference among individuals and unclear characteristics, and realizes accurate registration of left ventricular myocardium curved surfaces.

The application discloses an evaluation and diagnosis system for myocardial fibrosis based on photon CT energy scanning and belongs to the technical field of myocardial fibrosis evaluation. The evaluation and diagnosis system for myocardial fibrosis based on photon CT energy scanning comprises a scanning data acquisition module, a full-automatic heart segmentation module, a biological feature recognition module, a fibrosis region recognition module and a multi-parameter quantitative analysis module. The application solves the problem that the prior art has weak boundary distinguishing ability for myocardium, blood vessels and valves, and is prone to cause segment division deviation. The application realizes automatic and accurate segmentation of left ventricular myocardium, ensures the accuracy of standard 17-segment model division, greatly improves the speed and efficiency of fibrosis region recognition, effectively reduces manual operation intervention, reduces human error, improves the efficiency and accuracy of diagnosis, can comprehensively quantitatively analyze each myocardial segment and output rich key indicators.

This application discloses a method and apparatus for determining myocardial strain parameters based on 4DCTA images. The method includes: using a Mamba-based neural network to separate a first myocardial region image sequence from an original image sequence; performing motion correction on the myocardial region images in the first myocardial region image sequence to eliminate motion artifacts, resulting in a second myocardial region image sequence; obtaining the deformation field of the left ventricular myocardium region between consecutive myocardial region image frames in the second myocardial region image sequence through motion tracking; performing layering and block segmentation on the myocardial region images in the second myocardial region image sequence; and determining myocardial strain parameters using the deformation field of the left ventricular myocardium region between consecutive myocardial region image frames in the second myocardial region image sequence and the layering and block segmentation results of the myocardial region images in the second myocardial region image sequence. This application solves the technical problem of low efficiency in myocardial strain processing in related technologies.

According to the cardiac myocardial strain presentation method and the ultrasonic imaging equipment, the image data of at least one myocardial segment of the left ventricle and the right ventricle of the heart are obtained, and then the image data are processed to obtain the motion parameters of the myocardial segments of the left ventricle and the right ventricle. Displaying a composite bullseye diagram comprising a left ventricle bullseye sub-diagram and a right ventricle bullseye sub-diagram; wherein the left ventricle bull eye sub-graph comprises a plurality of left ventricle myocardial areas corresponding to a plurality of myocardial segments of the left ventricle, and motion parameters of the left ventricle myocardial segments are presented in the corresponding left ventricle myocardial areas; the right ventricle bull eye sub-graph comprises a right ventricle myocardial region corresponding to the myocardial segment of the right ventricle except for the myocardial segment which is partially or completely shared with the left ventricle, and the motion parameters of the right ventricle myocardial segment are presented in the right ventricle myocardial region corresponding to the right ventricle myocardial segment. A user can see motion parameters of left and right ventricular myocardium, so that the myocardial strain condition of the heart can be more comprehensively known, and the working efficiency of a doctor is improved.

The invention discloses a left ventricular myocardium deformation quantification method and system. The method comprises the following steps: obtaining a dynamic three-dimensional curved surface sequence of left ventricular myocardium in a complete heartbeat cycle; obtaining a Beltrami coefficient corresponding to each fixed anatomical point in each time frame according to a mapping relation between each frame in the three-dimensional curved surface sequence and a unified parameter domain, and obtaining a local deformation scalar of each frame in the three-dimensional curved surface sequence based on the coefficient; and constructing an intrinsic deformation trajectory curve of each fixed anatomical point on the unified parameter domain in the cardiac cycle, and determining a deformation feature vector according to the curve. According to the method, homeomorphic mapping from a myocardial curved surface at each time point to a unified parameter domain is established, three-dimensional motion is coded into sequential evolution of a Beltrami coefficient on a two-dimensional parameter point, the certainty of mapping is utilized to replace the estimability of frame-by-frame registration in a traditional three-dimensional space, drift and accumulative errors of corresponding points are fundamentally and effectively avoided, and the accuracy of the method is improved. And accurate quantification with high time-space consistency on myocardial deformation can be realized.