Diagnostic performance of 3D SPACE for comprehensive knee joint assessment at 3 T
Faculty of Medicine and Health Sciences
Insights into imaging / European Society of Radiology. - Berlin, 2010, currens
, 8 p.
University of Antwerp
Objective To assess the diagnostic performance of 3D sampling perfection with application-optimised contrasts using variable flip-angle evolution (SPACE) turbo spin-echo(TSE) sequences compared to 2D TSE for comprehensive knee assessment at 3 T. Methods From January to July 2011, isotropic 3D SPACE was added to a 2D knee protocol at 3 T. Forty patients underwent subsequent arthroscopy. Three readers independently assessed MR images for meniscus, anterior cruciate ligament (ACL) and cartilage lesions. Readers 1 and 2 evaluated 3D and 2D data at separate sittings; reader 3 interpreted the complete exam including 3D and 2D sequences. Accuracies were calculated using arthroscopy as reference standard. McNemars test (p<0.05) was used to compare 3D and 2D techniques. Results The highest diagnostic yield was obtained by reader 3 (accuracies ≥88 %). For the medial meniscus, readers performed better with the 2D technique than with 3DSPACE (accuracies 8588 % vs. 7880 %, respectively) (p>0.05). For the lateral meniscus and ACL, 3D and 2D techniques had similar performance (accuracies ≥93 %). For cartilage lesions, 3D SPACE had significantly lower specificity (p00.0156) than the 2D protocol for one reader. Conclusion The conventional 2D TSE acquisition is more reliable than 3D SPACE for comprehensive assessment of the knee at 3.0 T.