Patent ID: 6306091
Filing Date: 2001-10-23
Classification: A61B,G01S,Y10S

Abstract:
In a medical diagnostic ultrasound system which acquires a plurality of ultrasonic data sets of a human or animal, a method for estimating a transformation between: a first data set of said plurality of ultrasonic data sets, said first data set comprising a first plurality of data points, said first plurality of data points having a first arrangement characteristic in a first coordinate system, said first arrangement characteristic comprising distances, lengths and angles between two or more of said first plurality of data points; and a second data set of said plurality of ultrasonic data sets, said second data set comprising a second plurality of data points, said second plurality of data points having a second arrangement characteristic in a second coordinate system, said second arrangement characteristic comprising distances, lengths and angles between two or more of said second plurality of data points, said method comprising:(a) calculating a transformation between said first and second data sets wherein said transformation is a rotation group, special orthogonal group of order 3 transformation selected from the group consisting of quaternion and orthonormal matrix;(b) preserving said first arrangement characteristic in said second coordinate system using said transformation; and(c) approximating said second arrangement characteristic using said transformation.