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Rotator cuff: evaluation with US and MR imaging.

C J Seibold1, T A Mallisee, S J Erickson

  • 1Department of Radiology, Froedtert Memorial Lutheran Hospital, Milwaukee, WI, USA.

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|May 21, 1999
PubMed
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Magnetic resonance (MR) and ultrasound (US) imaging effectively assess rotator cuff disease. While both methods accurately detect complete tears, their accuracy for partial tears varies, requiring careful interpretation to avoid imaging artifacts.

Area of Science:

  • Orthopedics
  • Radiology
  • Medical Imaging

Background:

  • Rotator cuff disease assessment commonly utilizes magnetic resonance (MR) and ultrasound (US) imaging.
  • Optimal diagnostic techniques require understanding normal anatomy and potential imaging pitfalls.

Purpose of the Study:

  • To outline optimal MR and US imaging techniques for rotator cuff disease evaluation.
  • To highlight potential artifacts that may mimic rotator cuff tears.

Main Methods:

  • Utilizing a 1.5-T MR imaging unit with specific sequences and coils for high-resolution imaging.
  • Employing state-of-the-art commercial US with high insonation frequencies for detailed resolution.
  • Familiarization with normal anatomy and imaging artifacts like sonographic tendon anisotropy and MR magic angle effects.

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Main Results:

  • MR imaging demonstrates complete tears as hyperintense defects or avulsions, and partial tears as focal hyperintense regions.
  • Ultrasound reveals a broad spectrum of findings for both complete and partial rotator cuff tears.
  • Both MR imaging and US show high accuracy for complete tear detection, but results for partial tears are more variable.

Conclusions:

  • MR imaging and US are valuable tools for evaluating rotator cuff injuries.
  • Accurate diagnosis depends on recognizing specific imaging features and avoiding artifact misinterpretation.
  • Further refinement in detecting partial tears using these modalities may be warranted.