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Background: Aims & Objectives of this study is to evaluate meniscal injuries using volumetric MRI(VISTA) and to compare volumetric protocol with 2D protocol considering arthroscopy as reference standard. The purpose of this study is also to determine whether volumetric MRI is superior to 2D MRI in diagnosis of injuries AND/OR can allow reduction in total imaging time without loss of diagnostic efficiency. Methods: Total 51 subjects were studied.Adult patients referred for MR evaluation of knee trauma and subsequently underwent arthroscopy included.Patients with previous knee surgery and non-traumatic pathologies excluded. Imaging performed on 1.5T Philips Achieva MRI machine. Conventional MRI images were acquired, followed by 3D VISTA data-sets in sagittal plane which were then reconstructed. Results: Regarding detection of medial meniscus tears, overall sensitivity was similar for two techniques (88.2%), specificity of 2D & 3D protocol was 88.2% and 94.1% respectively. Regarding detection of lateral meniscal tears, specificity was similar for two techniques (84.9%) while sensitivity of 2D & 3D protocol was 72.2% & 83.3% respectively. Conclusions: 3D TSE is a reliable technique and has diagnostic performance similar to that of routine 2D TSE MR for detecting meniscal tears at 1.5T. 3D TSE MRI protocol has advantage of faster acquisition time which potentially reduces patient discomfort and improves efficiency by reducing patient non-compliance. Results of this study represent an important step toward implementing this technique in routine clinical practice.
Rosane Cavalcante Fragoso, Brasil
Chief Scientific Officer and Head of a Research Group
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