Magnetic Resonance Diagnosis of the Anterior Labrum and Capsule
| Autor: | Olaf Walter, Markus Uhl, J. Laubenberger, K.-H. Allmann, Mathias Langer, Carlos-hernando Buitrago-tellez, Norman Biebow |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Adult
Joint Instability Male Adolescent Field strength Sensitivity and Specificity medicine Humans Radiology Nuclear Medicine and imaging Prospective Studies Labrum medicine.diagnostic_test Shoulder Joint business.industry Shoulder Dislocation Arthroscopy Capsule Magnetic resonance imaging General Medicine Gold standard (test) Magnetic Resonance Imaging Shoulder instability Female Mr images Nuclear medicine business |
| Zdroj: | Investigative Radiology. 33:415-420 |
| ISSN: | 0020-9996 |
| DOI: | 10.1097/00004424-199807000-00007 |
| Popis: | RATIONALE AND OBJECTIVES. The authors compare the performance of high-field and low-field magnetic resonance (MR) systems in the evaluation of shoulder instability, 35 patients were examined at field strengths of 1.0 T and of 0.2 T. METHODS. Surface coils were used in both systems. Because arthroscopy was used as gold standard, a preselected patient-population was obtained for the study. RESULTS. The sensitivity/specificity/accuracy of MR images acquired at 1.0 T for labrum pathology were 91%/67%/91% and 70%/80%/71% for the capsular complex. Compared with the above, the sensitivity/specificity/accuracy for 0.2 T MR images revealed 91%/67%/91% for the labrum pathology and 63%/80%/66% for the capsular complex respectively. In the evaluation of capsular lesions a comparison between the 0.2 T MR system and the 1.0 T system indicated a higher sensitivity and accuracy for the high-field images. Concerning labral lesions, the sensitivity and accuracy of the 0.2 T MR imager and the 1.0 T imager were comparable. CONCLUSIONS. Given differences in imaging protocols, imaging at 0.2 T does not adversely affect the assessment of shoulder instability when compared with imaging at 1.0 T. These preliminary results warrant more extensive clinical comparison of results obtained at different magnetic field strengths. |
| Databáze: | OpenAIRE |
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