Patents by Inventor W. Clem Karl

W. Clem Karl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for estimating diameter of an artery using B-mode ultrasonic images
    Patent number: 5495852
    Abstract: An improved apparatus and method for measuring the diameter of an artery utilizes an ultrasonic imaging plane that is rotated slightly from the centerline of an artery to produce a "skew" image of the artery. The invention detects edge points on the image of near and far walls of the artery. It fits curves to the near and far end edge points and measures distances between the curves. Alternatively, it fits one curve to all the edge points and measures a parameter (such as minor diameter of an ellipse) of the curve. Finally, it estimates arterial diameter from the measurement.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: March 5, 1996
    Assignee: Boston Heart Foundation
    Inventors: Robert W. Stadler, W. Clem Karl, Robert S. Lees