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KMID : 1103720200810010176
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Journal of the Korean Society of Radiology
2020 Volume.81 No. 1 p.176 ~ p.189
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Clinical Efficacy of Real-Time Sonoelastography for the Follow-Up of Congenital Sternocleidomastoid Muscle Torticollis
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Jeong Mi-Ri
Lee In-Sook
Shin Yong-Beom
Song You-Seon
Park Se-Kyoung
Song Jong-Woon
Moon Jin-Il
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Abstract
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Purpose: To evaluate the clinical efficacy of real-time sonoelastography (RTS) for the follow-up of congenital muscular torticollis, based on measurements of muscle elasticity.
Materials and Methods: Thirty-four infants (23 male, 11 female) with congenital sternocleidomastoid (SCM) muscle torticollis underwent ultrasonography and elastography between November 2012 and December 2014. We evaluated the thickness, morphology (mass-like, fusiform, or overall thickened shape), and echogenicity of the SCM muscle on grayscale images and color patterns (homogeneous blue, mixed green < 50% and ≥ 50%, and green to red) on elastography. Strain ratios were measured using Q-lab software. A clinician classified the degree of neck rotation and side flexion deficits using a 5-point grade system based on angles of neck rotation and side flexion. Correlations between the ultrasonography and clinical findings were evaluated by statistical analysis.
Results: Twenty-two infants had right and 12 had left SCM torticollis, respectively. Linear regression analysis showed that involved/contralateral SCM thickness differences, morphology, elasticity color scores, and strain ratios of the affected SCM muscles were significantly correlated with neck rotation and side flexion deficit scores (p < 0.05). The elasticity color score of the affected SCM muscle was the most significant factor.
Conclusion: RTS might provide a reliable means for evaluating and monitoring congenital muscular torticollis.
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KEYWORD
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Index terms Ultrasound, Sonoelastography, Muscles, Torticollis, Infant
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