A generalized speckle tracking algorithm for ultrasonic strain imaging using dynamic programming.

ABSTRACT: This study developed an improved motion estimation algorithm for ultrasonic strain imaging that employs a dynamic programming technique. In this article, we model the motion estimation task as an optimization problem. Since tissue motion under external mechanical stimuli often should be reasonably continuous, a set of cost functions combining correlation and various levels of motion continuity constraint were used to regularize the motion estimation. To solve the optimization problem with a reasonable computational load, a dynamic programming technique that does not require iterations was used to obtain displacement vectors in integer precision. Then, a subsample estimation algorithm was used to calculate local displacements in fractional precision. Two implementation schemes were investig

SUBMITTER: Jiang J 

PROVIDER: S-EPMC2843521 | biostudies-literature | 2009 Nov

REPOSITORIES: biostudies-literature