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. 2011 Jul 15;469(11):3229–3240. doi: 10.1007/s11999-011-1945-4

Fig. 1A–B.

Fig. 1A–B

(A) The radial MRI planes, which are perpendicular to the femoral head-neck axis, are defined on a sagittal oblique localizer. (B) The radial cuts rotate clockwise in 30°-intervals around the femoral head-neck axis. The alpha angle measurements were performed throughout the cranial hemisphere from 9 o’clock to 3 o’clock.