Magnetic resonance imaging (MRI) is a well-established technique for detecting internal derangements of the knee joint with high diagnostic accuracy. It is an effective tool to select patients for targeted therapeutic arthroscopy. In this article, indications for knee MRI and most commonly used MRI techniques are outlined, followed by an overview of the most frequently encountered traumatic knee derangements in daily practice and their appearance and grading system on MRI. Lesions discussed include fractures, osteochondral lesions, bone bruise, cruciate and collateral ligament lesions, and meniscal tears. Finally, common pitfalls and recent developments in knee MRI are addressed.

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Journal Seminars in Ultrasound, CT and MRI
Oei, E.H.G, Ginai, A.Z, & Hunink, M.G.M. (2007). MRI for Traumatic Knee Injury: A Review. Seminars in Ultrasound, CT and MRI, 28(2), 141–157. doi:10.1053/j.sult.2007.01.003