J Korean Radiol Soc.  2007 Jun;56(6):569-573. 10.3348/jkrs.2007.56.6.569.

Evaluation of the SLAP Lesion Using a Low-field (0.2T) Magnetic Resonance System

• Cho YS
• Back CH
• Lee KR
• Shin YH

• KMID: 1834439
• DOI: http://doi.org/10.3348/jkrs.2007.56.6.569

Abstract

PURPOSE
To evaluate the diagnostic capabilities of the low-field (0.2T) magnetic resonance (MR) system in the detection of the superior labrum anterior to posterior (SLAP) lesion.
MATERIALS AND METHODS
One hundred fifty patients underwent magnetic resonance imaging of the shoulder over a 7-month period. Forty-six patients underwent arthroscopic surgery, and the surgical results were correlated with the findings of the MR imaging. Arthroscopic procedures were performed within a mean of 8 days after MR imaging. MR imaging of the shoulder was conducted as follows: shoulder coil; T1-weighted spin echo, coronal-oblique images; T2-weighted gradient echo, coronal-oblique and axial images; and T2-weighted spin echo, coronal-oblique and sagittal-oblique images. Prospectively, one radiologist interpreted the MR images.
RESULTS
The results of surgery were as follows: SLAP II in 26 shoulders, SLAP III in 1 shoulder, SLAP IV in 1 shoulder, normal labrum in 6 shoulders. For SLAP lesions with a higher grade than type 2, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of the low-field MRI were 85.7%, 55.5%, 75%, 71%, and 74%, respectively.
CONCLUSION
There was relatively good agreement for the comparison of the MR results obtained using a low-field MR system with the surgical findings for identifying SLAP lesions.

Keyword

Shoulder, MR; Magnetic resonance (MR), low-field-strength imaging; Arthroscopy

MeSH Terms

Arthroscopy
Humans
Magnetic Resonance Imaging
Prospective Studies
Sensitivity and Specificity
Shoulder