INTRODUCTION:In a recent American study, the epidemiology of acute knee injuries was evaluated in a local community population. Knee injuries associated with sports activities were the most common (36.3%), followed by nonsports related twisting bending and step related injuries (26.5%), falls (21.1%) and other trauma 8.6% (1).Knee pain is common throughout the world.  In one population based survey of Chinese subjects aged 70 and over, the knee was the most commonly reported site of pain complaints (2).

MRI is an excellent diagnostic tool for identifying problems such as sprained ligaments, meniscal injuries, bone bruises and osteochondral lesions at the knee.  MRI is so sensitive that it identifies minor problems which may not be relevant to the patients complaints, other times it identifies a truly painful problem which the physical examination did not detect (3).   Intra-articular loose bodies are an example of a problem that may be more identifiable utilizing CT scan or arthroscopic examination

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