Musculoskeletal motion flow fields using hierarchical variable-sized block matching in ultrasonographic video sequencesJames Revell, Majid Mirmehdi, Donal McNally, Musculoskeletal motion flow fields using hierarchical variable-sized block matching in ultrasonographic video sequences. Journal of Biomechanics , 37(4). ISSN 0021-9290, pp. 511–522. April 2004. PDF, 1283 Kbytes.
We examine tissue deformations using non-invasive dynamic musculoskeletal ultrasonograhy, and quantify its performance on controlled in vitro gold standard (groundtruth) sequences followed by clinical in vivo data. The proposed approach employs a two-dimensional variable-sized block matching algorithm with a hierarchical full search. We extend this process by refining displacements to sub-pixel accuracy. We show by application that this technique yields quantitatively reliable results.