Method and apparatus for determining the position of a tangential plane to three extreme points of a body

摘要

In a method for determining the position of a tangential plane, which is not tangentially to three collinear extreme points of structures of a body abuts, in which the position of the three extreme points approximately by three in the region of the structures and the starting points lying determined as a tangential plane a plane passing through these three the starting point is calculated, the calculation of the position of the tangential plane of the invention is to improve that, by means of a navigating ultrasonic radiation emitting ultrasound head in a marked by the structure of the body in the region of the three extreme points is examined, and the ultrasound image of each examined structure on an image display in a manner that, in the ultrasound image of the image display, a line of intersection of the examination plane and the tangential plane that, during each structure, as an improved extreme point the point lying in the examination plane selects the structure from the line of intersection of the largest or has the smallest spacing, and that there is used as the improved tangential plane a result of these three improved extreme points is calculated passing. In the patent, a device for carrying out this method.