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Rotator cuff lesions: signal patterns at MR imaging
M Rafii1, H Firooznia, O Sherman
1Department of Radiology, New York University School of Medicine, NY 10016.
Radiology
|December 1, 1990
Summary
Magnetic resonance (MR) imaging accurately detects rotator cuff tears. Intense signal patterns on T2-weighted images are key indicators for diagnosing full-thickness and partial-thickness tears.
Area of Science:
- Musculoskeletal Imaging
- Radiology
- Orthopedic Surgery
Background:
- Rotator cuff tears are common injuries affecting shoulder function.
- Accurate diagnosis of rotator cuff tears is crucial for effective treatment planning.
Purpose of the Study:
- To evaluate the signal intensity patterns of rotator cuff lesions using magnetic resonance (MR) imaging.
- To correlate MR findings with surgical and histological outcomes.
Main Methods:
- MR imaging was performed at 1.5 T using a flexible circular surface coil.
- Studies included 80 patients with surgical correlation and 13 asymptomatic individuals.
- Histologic correlation was obtained in six cadaver shoulders.
Main Results:
- MR imaging demonstrated high accuracy for full-thickness tears (0.95) and partial-thickness tears (0.84).
- Intense signal on T2-weighted images was the most common and accurate pattern for full-thickness tears.
- Similar intense signal patterns on T2-weighted images were accurate for partial tears, though less common.
Conclusions:
- MR imaging is a reliable tool for diagnosing rotator cuff tears.
- Specific signal intensity patterns, particularly intense signals on T2-weighted images, aid in differentiating tear types.
- Overlap in signal patterns necessitates careful interpretation to distinguish tears from tendinitis and degeneration.