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Localization of MTrPs using vibration elastography. (a) An external massager generates shear waves that propagate through the muscle. (b) Hypoechoic areas (MTrPs) in B-mode image are observed to be vibrating less than the surrounding muscle in color variance image.
MTrPs = myofascial trigger points.
Note: Figure is available in full color in the online version at uix.sagepub.com
