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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Mapping of lumbar multifidus stiffness Quantification in ankylosing spondylitis with shear-wave elastography

Fig. 2

Representative images of elasticity measurement by shear-wave elastography (SWE) in one AS patient and one volunteer. a SWE US image of left LM muscle in AS patients. b SWE US image of right LM muscle in AS patients. c SWE US image of left LM muscle in controls. d SWE US image of right LM muscle in controls. The regions of interest (ROIs) were positioned at the level of the L4–5 zygapophyseal joints of the lumbar PSMs in the B-mode image. The lower and upper rows show changes in the ROIs by grayscale US and SWE, respectively. The color map shows the distribution of elasticity values scaled from 0 to 180 kPa and calculated from shear-wave velocity (SWV) values using YM

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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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