How much rotation of the body is required for posterior axial oblique projection for acetabulum (Teufel method)?

Question

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For the posterior axial oblique projection for acetabulum (Teufel method), the body is rotated about 35° to 40° posteriorly to the affected side, with the unaffected leg flexed and abducted. This angle of rotation is required to project the acetabulum onto the radiographic plate without superimposition of the femoral head and neck.

How Much Rotation of the Body Is Required for Posterior