Hip dysplasia: the Norberg angle
Findings are Pro only. Every normal study is free; Pro opens each finding beside its normal.
See ProWhat to look for
- A line joins the centres of the two femoral heads; a second runs from each centre to the cranial rim of its acetabulum
- The angle between them is the Norberg angle: 105° or more is normal
- Here 97° and 95°, so the femoral heads sit too far out of their sockets
Against the normal
Read every bone's outline and density, then every joint: the space, the margins and the bone under the cartilage. Compare with the other limb, and always take at least two views at right angles.
Source: Kalumet, “Hüftgelenksdysplasie Norberg”, Wikimedia Commons. CC BY-SA 3.0. For learning: not a diagnostic service.
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Read the film, then see the anatomy in 3D.
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