We aimed to evaluate the diagnostic performance of a three-dimensional fast-spin echo(3D MATRIX) accelerated with compressed sensing(CS) for internal injury of the knee joint.Sixty-two knee joints with trauma were examined at 3T MRI system including conventional 2D FSE protocol and 3D MATRIX before arthroscopic operations. Signal-to-noise ratio(SNR), contrast signal-to-noise ratio(CNR) and diagnostic performance were compared between two sequences. We found that 3D MATRIX had significantly higher SNR and CNR, and provided higher sensitivity but lower specificity for diagnosing cartilage injury compared to conventional 2D FSE. And the two sequences had similar diagnostic performance for ACL and meniscus tear.
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