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Updated: Apr 25, 2026
Image-based Lagrangian Particle Tracking in Bed-load Experiments
Published on: July 20, 2017
Improved tracking performance of Lagrangian block-matching methodologies using block expansion in the time domain: in
John Albinsson1, Sofia Brorsson2, Asa Rydén Ahlgren3
1Department of Biomedical Engineering, Lund University, Lund, Sweden.
Abstract:
The aim of this study was to evaluate tracking performance when an extra reference block is added to a basic block-matching method, where the two reference blocks originate from two consecutive ultrasound frames. The use of an extra reference block was evaluated for two putative benefits: (i) an increase in tracking performance while maintaining the size of the reference blocks, evaluated using in silico and phantom cine loops; (ii) a reduction in the size of the reference blocks while maintaining the tracking performance, evaluated using in vivo cine loops of the common carotid artery where the longitudinal movement of the wall was estimated. The results indicated that tracking accuracy improved (mean = 48%, p < 0.005 [in silico]; mean = 43%, p < 0.01 [phantom]), and there was a reduction in size of the reference blocks while maintaining tracking performance (mean = 19%, p < 0.01 [in vivo]). This novel method will facilitate further exploration of the longitudinal movement of the arterial wall.
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