Abstract
Article: Influence of Load and Transducer Bandwidth on the Repeatability of In Vivo Tendon Stiffness Evaluation Using Shear Wave Elastography
Authors: Rafał Obuchowicz, Lukasz Ambrozinski, and Piotr Kohut
Category: Musculoskeletal [MSK]
Credit: 1.0 SDMS CME Credit
Objectives: After studying the article entitled “Influence of Load and Transducer Bandwidth on the Repeatability of In Vivo Tendon Stiffness Evaluation Using Shear Wave Elastography,” you will be able to:
Understand the application of shear wave elastography (SWE)
Describe how SWE is performed on tendons
Knowledge of transducer selection and patient positioning for tendon evaluation using SWE
Which tendon characteristic reflects its degeneration on SWE? Size Thickness Vascularity Stiffness
Which feature of SWE changes with imaging depth? Elastic nonlinearity Speed variability Strain ratio Fibrosis index
Which of the following tendons is most easily accessible for elastography? Subscapularis Iliopsoas Achilles Semimembranosus
Why were three different patient positions used while scanning during this study? Vary the tendon tensile load Change the tendon length Position the tendon more superficially Decrease anisotropy
How do shear waves propagate in tissues? Parallel to the transverse wave Perpendicular to the longitudinal wave Parallel to the longitudinal wave Perpendicular to the transverse wave
At which time of day were the test subjects scanned for this study? Morning, after overnight rest Morning, after brisk walk Middle of the day Evening, after working
Which location was used as the region of interest in the Achilles tendon? 5 mm below the myotendinous junction Directly at the calcaneal insertion At the myotendinous junction 10 mm above the calcaneal tuberosity
In which state did the transducer provide 100% coverage of the tendon while acquiring the image? Relaxed while lying prone Relaxed while lying in decubitus Tensed while standing Fully tensed on flexed toes
Which transducer resulted in better performance in terms of elasticity map coverage? SL 10-2 SL 12-3 SL 15-4 SL 18-7
Which situation resulted in the best color map coverage? Highest frequency transducer, independent of tendon tension Highest frequency transducer, relaxed tendon tension Lowest frequency transducer, tensed tendon Lowest frequency transducer, independent of tendon tension
Footnotes