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Diagnostic imaging of the diabetic foot.

Diagnostic imaging plays a major role in the osteoarticular disease of the foot in diabetics, allowing the diagnosis and evaluation of alterations for therapy planning. To-date conventional radiology is still of first choice in the study of the diabetic foot with the evaluation of osteoarticular damage caused by neuropathy and vascular disease. Major radiographic patterns are neuroarthropathy and osteomyelitis. Main locations are at the level of forefoot and less frequently of tarsus and tibiotarsal joint. Second choice procedures as US, CT and MRI are useful for a more accurate evaluation of soft tissue lesions and articular structures. US is the first choice procedure in soft tissue evaluation to rule out the presence of abscesses which require surgery. MRI with some limitations represents the gold standard for the study of joints and medullary disease. Spiral CT though less specific and sensitive than MRI for soft tissue and bone marrow study is still the exam of reference for the study of bone structures with three-dimensional reconstructions useful to plan orthopedic surgery.