Abstract: A method of tracking position and velocity of objects' borders in two or three dimensional digital images, particularly in echographic images. A sequence is acquired of at least two consecutive ultrasound image frames of a moving tissue or a moving object. The frames are separated by a certain time interval. Reference points define a border of the moving tissue or object and the border is automatically tracked by estimating the position of the reference points in following image frames on the basis of the ultrasound image data of the acquired sequence of image frames.

Abstract: A method is disclosed for estimating tissue velocity vectors and oriented strain from ultrasonic diagnostic imaging data. Reference points are defined from evaluation of image data derived from reflected ultrasonic beams in order to determine the direction of motion and the velocity vector of the reference points. The velocity of motion for corresponding reference points between two successive image frames is determined by applying a particle image velocimetry technique. Components of the tissue strain is then obtained from time integration of the strain-rate that is determined from the gradient of velocity estimated from the velocity data in two or more reference points.

Abstract: A method for fetal weight estimation wherein fetal biometric parameters are ultrasonically measured and further physiological and phenomenological pregnancy parameters are determined for a plurality of sample cases. The fetal weight for each of the sample cases is then determined by precision weighing at birth. A database is then created based on the known sample cases and mathematical prediction models are generated from the database. For the case under examination for which fetal weight is to be predicted, the fetal biometric parameters are ultrasonically measured and further physiological and phenomenological pregnancy parameters are determined. The fetal weight of the case under examination is predicted by using a mathematical prediction model and a multinormal probabilistic model is used as a mathematical model.

Abstract: A method for correcting and/or calibrating magnetic fields, particularly intended for magnets in nuclear magnetic resonance imaging equipment, involves the mathematical description of the field generated by a magnet structure with a harmonic polynomial expansion and the determination of the number, position and magnetization distribution parameters on a predefined distribution grid, related to the magnetic structure, by comparing the polynomial expansion coefficients obtained from a sampling measurement of the actual field with the coefficients of the field having the desired characteristics.