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Shear Wave Ultrasound Elastographic Evaluation of the Rotator Cuff Tendon
Author(s) -
Hou Stephanie W.,
Merkle Alexander N.,
Babb James S.,
McCabe Robert,
Gyftopoulos Soterios,
Adler Ronald S.
Publication year - 2017
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/ultra.15.07041
Subject(s) - medicine , rotator cuff , asymptomatic , tendon , shoulders , elastography , deltoid muscle , ultrasound , radiology , nuclear medicine , surgery
Objectives (1) Assess the association between the B‐mode morphologic appearance and elasticity in the rotator cuff tendon using shear wave elastography (SWE). (2) Assess the association between SWE and symptoms. Methods Institutional Review Board approval and informed consent were obtained. A retrospective review identified 21 studies in 19 eligible patients for whom SWE was performed during routine sonographic evaluations for shoulder pain. Evaluations were compared with 55 studies from 16 asymptomatic volunteers and 6 patients with asymptomatic contralateral shoulders. Repeated studies were accounted for by resampling. Proximal and distal tendon morphologic characteristics were graded from 1 to 4 (normal to full‐thickness tear), and average shear wave velocity (SWV) measurements were obtained at both locations. In 68 examinations, deltoid muscle SWV measurements were available for post hoc analysis. Results The morphologic grade and SWV showed weak‐to‐moderate negative correlations in the proximal ( P < .001) and distal ( P = .002) rotator cuff tendon. A weakly significant SWV decrease was found in the proximal tendon in symptomatic patients ( P = .049); no significant difference was seen in the distal tendon. The deltoid muscle SWV showed weak‐to‐moderate negative correlations with the morphologic grade in the proximal ( P = .004) and distal ( P = .007) tendon; the deltoid SWV was also significantly lower in symptomatic shoulders ( P = .001). Conclusions Shear wave elastography shows tendon softening in rotator cuff disease. It captures information not obtained by a morphologic evaluation alone; however, a poor correlation with symptoms suggests that SWE will be less useful in workups for shoulder pain than for preoperative assessments of tendon quality. Deltoid muscle softening seen in morphologically abnormal and symptomatic patients requires further exploration.