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Five radial reformats around the acetabular opening are generated from three-dimensional MRI: Anterior (1), AS (2), SA (3), S (4), SP (5) planes around the acetabulum are generated by first identifying the transverse acetabular ligament, which is used as the reference landmark. The superior plane goes through the middle of the transverse ligament and the remaining planes rotate in 30º steps around the acetabular opening axis.
