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Update on MR Imaging of the Acetabular Labrum.

Zachary E Stewart1, Donna G Blankenbaker2

  • 1Department of Radiology, Musculoskeletal Imaging & Intervention, Massachussets General Hospital, 55 Fruit Street, Yawkey Building, Room 6033, Boston, MA 02114, USA.

Magnetic Resonance Imaging Clinics of North America
|November 8, 2024
PubMed
Summary

Acetabular labral tears cause hip pain. High-resolution 3T MRI or MR arthrography is recommended for accurate diagnosis, focusing on labral morphology and signal abnormalities to avoid misinterpretation.

Keywords:
HipLabrumMRMR arthrographySublabral sulcus

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Medical Imaging

Background:

  • Acetabular labral tears are a common mechanical cause of hip pain.
  • Accurate diagnosis is crucial for effective hip preservation surgery.

Purpose of the Study:

  • To outline optimal magnetic resonance (MR) imaging techniques for diagnosing acetabular labral tears.
  • To highlight key imaging findings and potential pitfalls in assessing the acetabular labral complex.

Main Methods:

  • Recommend 3T MR imaging with a small field of view and high-resolution sequences.
  • Suggest direct MR arthrography for lower strength magnets.
  • Emphasize evaluation of labral morphology and abnormal T2 signal or contrast enhancement.

Main Results:

  • Specific imaging parameters (3T, high-resolution, small FOV) improve acetabular labral tear detection.
  • Abnormalities in labral morphology and signal/contrast extension are key diagnostic indicators.
  • Understanding imaging pitfalls prevents misinterpretation of labral abnormalities.

Conclusions:

  • Optimal MR imaging protocols are essential for accurate acetabular labral tear diagnosis.
  • Detailed description of tear extent aids hip preservation surgeons.
  • Awareness of potential pitfalls enhances diagnostic confidence and patient care.