Table 1. Standardized interpretation of radiographs in the evaluation of natural hips. The analyzed parameters are shown according to the radiographic view.

Pelvic anteroposterior radiograph

1. Test quality: proper pelvic inclination and rotation

2. Lateral center-edge angle

3. Angle of inclination of the acetabular roof

4. Extrusion of the femoral head

5. Lateralization of the femoral head

6. Femoral neck-shaft angle

7. Medial and lateral joint space at the acetabular roof

8. Orientation of the acetabular walls

9. Orientation of the ischial spines

10. Sphericity of the femoral head

11. Positive findings: cysts, osteophytes, implants, stress fracture, periosteal reaction, medullary bone alterations, proximity of the trochanter to the ischium/acetabulum, prominent anterosuperior iliac spine

Dunn 45° and lateral frog views

1. Shape of the acetabulum shape

2. Sphericity of the femoral head

3. Alpha angle

4. Positive findings

False Lateral Lequesne View

1. Shape of the acetabulum

2. Sphericity of the femoral head

3. Variation from posterior to anterior of the thickness of the joint cartilage

4. Center-anterior border angle

5. Positive findings, especially anterosuperior or posteroinferior arthrosis