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Proceedings Paper

Dedicated ultrasound speckle tracking to study tendon displacement
Author(s): Jan-Wiebe H. Korstanje; Ruud W. Selles; Henk J. Stam; Steven E. R. Hovius; Johan G. Bosch
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Paper Abstract

Ultrasound can be used to study tendon and muscle movement. However, quantization is mostly based on manual tracking of anatomical landmarks such as the musculotendinous junction, limiting the applicability to a small number of muscle-tendon units. The aim of this study is to quantify tendon displacement without employing anatomical landmarks, using dedicated speckle tracking in long B-mode image sequences. We devised a dedicated two-dimensional multikernel block-matching scheme with subpixel accuracy to handle large displacements over long sequences. Images were acquired with a Philips iE33 with a 7 MHz linear array and a VisualSonics Vevo 770 using a 40 MHz mechanical probe. We displaced the flexor digitorum superficialis of two pig cadaver forelegs with three different velocities (4,10 and 16 mm/s) over 3 distances (5, 10, 15 mm). As a reference, we manually determined the total displacement of an injected hyperechogenic bullet in the tendons. We automatically tracked tendon parts with and without markers and compared results to the true displacement. Using the iE33, mean tissue displacement underestimations for the three different velocities were 2.5 ± 1.0%, 1.7 ± 1.1% and 0.7 ± 0.4%. Using the Vevo770, mean tissue displacement underestimations were 0.8 ± 1.3%, 0.6 ± 0.3% and 0.6 ± 0.3%. Marker tracking displacement underestimations were only slightly smaller, showing limited tracking drift for non-marker tendon tissue as well as for markers. This study showed that our dedicated speckle tracking can quantify extensive tendon displacement with physiological velocities without anatomical landmarks with good accuracy for different types of ultrasound configurations. This technique allows tracking of a much larger range of muscle-tendon units than by using anatomical landmarks.

Paper Details

Date Published: 13 March 2009
PDF: 11 pages
Proc. SPIE 7265, Medical Imaging 2009: Ultrasonic Imaging and Signal Processing, 726505 (13 March 2009); doi: 10.1117/12.811156
Show Author Affiliations
Jan-Wiebe H. Korstanje, Erasmus MC (Netherlands)
Ruud W. Selles, Erasmus MC (Netherlands)
Henk J. Stam, Erasmus MC (Netherlands)
Steven E. R. Hovius, Erasmus MC (Netherlands)
Johan G. Bosch, Erasmus MC (Netherlands)

Published in SPIE Proceedings Vol. 7265:
Medical Imaging 2009: Ultrasonic Imaging and Signal Processing
Stephen A. McAleavey; Jan D'hooge, Editor(s)

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