Abstract
Objective
To determine whether there is an association between T2/T2* mapping and supraspinatus tendon mechanical properties as assessed by shear-wave ultrasound elastography (SWE).
Materials and methods
This HIPAA-compliant prospective pilot study received approval from our hospital’s institutional review board. Eight patients (3 males/5 females; age range 44–72 years) and nine shoulders underwent conventional shoulder MRI, T2/T2* mapping on a 3-T scanner, and SWE. Two musculoskeletal radiologists reviewed the MRI examinations in consensus for evidence of supraspinatus tendon pathology, with tear size measured for full-thickness tears. T2/T2* values and ultrasound shear-wave velocities (SWV) were calculated in three corresponding equidistant regions of interest (ROIs) within the insertional 1–2 cm of the supraspinatus tendon (medial, middle, lateral). Pearson correlation coefficients between T2/T2* values and SWV, as well as among T2, T2*, SWV and tear size, were calculated.
Results
There was a significant negative correlation between T2* and SWV in the lateral ROI (r = −0.86, p = 0.013) and overall mean ROI (r = −0.90, p = 0.006). There was significant positive correlation between T2 and measures of tear size in the lateral and mean ROIs (r range 0.71–0.77, p range 0.016–0.034). There was significant negative correlation between SWV and tear size in the middle and mean ROIs (r range −0.79–-0.68, p range 0.011–0.046).
Conclusion
Our pilot study demonstrated a potential relationship between T2* values and shear wave velocity values in the supraspinatus tendon, a finding that could lead to an improved, more quantitative evaluation of the rotator cuff tendons.
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Konstantin Krepkin: None
Mary Bruno: None
José Raya: None
Soterios Gyftopoulos: Funding from Toshiba America Medical Systems/RSNA Research Seed Grant, Career Development, #RSD1311
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This HIPAA-compliant study received approval from our hospital’s institutional review board and waiver of consent.
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Krepkin, K., Bruno, M., Raya, J.G. et al. Quantitative assessment of the supraspinatus tendon on MRI using T2/T2* mapping and shear-wave ultrasound elastography: a pilot study. Skeletal Radiol 46, 191–199 (2017). https://doi.org/10.1007/s00256-016-2534-0
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DOI: https://doi.org/10.1007/s00256-016-2534-0