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Official Journal of the Italian Society of Orthopaedics and Traumatology

Fig. 3 | Journal of Orthopaedics and Traumatology

Fig. 3

From: Cam morphology and inguinal pathologies: is there a possible connection?

Fig. 3

Alpha angle (α) measurement on a Dunn view X-ray. α is defined by drawing the best-fit circle around the femoral head and identifying the point at which the femoral head profile leaves the circle. A line is drawn between the centre of this circle (a) and the identified point (b). A second line is drawn between point A and the axis of the femoral neck, which is defined by connecting the centre of the femoral head with the centre of the femoral neck (c). The angle between these two lines is the α. An α ≥55° is considered to provide radiographic evidence of a cam morphology

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