| 摘要 |
Disclosed are computer-implemented methods, systems, and computer program products for displaying superimposed image contours. A first centroid or center-of-mass of a contour extracted from a first image that depicts a moving object as the object appeared at a first time is calculated. A second centroid or center-of-mass of a second contour extracted from a second image that depicts the object as the object appeared at a second time is also calculated. The second image depicts the object in substantially the same plane as the first image. The first and second contours are displayed with the respective first and second centroids or centers-of-mass positioned at a common location. In some implementations, the images are ultrasound images depicting, for example, a human heart. The images can be transgastric short axis views of the human heart. |
| 主权项 |
1. A computer-implemented method comprising:
calculating a first centroid or center-of-mass of a first contour extracted from a first image depicting a moving object as the object appeared at a first time; calculating a second centroid or center-of-mass of a second contour extracted from a second image depicting the object as the object appeared at a second time, the second image depicting the object in substantially the same plane as the first image; and displaying the first and second contours superimposed on a single display, with the respective first and second centroids or centers-of-mass positioned at a common location, wherein the displaying step includes displaying at least one identifying characteristic or feature for visually distinguishing the first contour from the second contour, wherein the step of calculating a first centroid or center-of-mass of the first contour and the step of calculating a second centroid or center-of-mass of the second contour each comprise the steps of: partitioned a polygon into a plurality of triangles each having three vertices: (x1, y1), (x2, y2), and (x3, y3); computing a centroid (xc, yc) of each triangle based on the equation(xc,yc)=((x1+x2+x33),(y1+y2+y33));and
summing the coordinates of each of the centroids, weighted by the area of each triangle. |
