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A directed approach to MRI of the athletic knee.

Surface coil MRI is now frequently utilized to assess acutely injured knees. In dedicated athletes, unique considerations exist which modify standard diagnosis and therapy. Concrete clinical findings must justify the potential loss of livelihood from even a "negative" arthroscopy. Seventeen injured athletes were evaluated by an orthopedic surgeon experienced in sports injuries and a preliminary localizing diagnosis was rendered, followed by knee MRI. Of 17 patients with significant injuries, MRI agreed with operative findings or clinical follow-up in 15 cases. Knee MRI prompted early intervention in those patients with conflicting subjective and/or objective findings. Furthermore, it helped direct the arthroscopist's surgical approach and encouraged close examination of areas less optimally visualized arthroscopically. MR and arthroscopy were complementary modalities in diagnosing certain ligamentous and cartilaginous lesions. MR effectively evaluated the cruciate ligaments often difficult to visualize by arthroscopy; arthroscopy better assessed articular surfaces. A cooperative effort existed between orthopedic surgeon and radiologist in directing both the MR study and arthroscopy. This was of particular benefit in maximizing scan efficiency in these large individuals who often filled the gantry. The team directed approach between orthopedic surgeon and radiologist affords deliberate and efficient diagnosis and therapy in this select population.