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Insights into Imaging
Fig. 30 | Insights into Imaging

Fig. 30

From: Subchondral insufficiency fractures, subchondral insufficiency fractures with osteonecrosis, and other apparently spontaneous subchondral bone lesions of the knee—pathogenesis and diagnosis at imaging

Fig. 30

Distribution of osteonecrosis from systemic origin. T1-weighted MR image shows lesions characterized by bone marrow areas surrounded by a peripheral rim (asterisks). These lesions are often bilateral, epiphyseal, and diaphyseal-metaphyseal. The areas within the peripheral rims may show a normal marrow signal, corresponding to mummified but not degraded fat

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