Measurement: Line along the inferior border of the superior pubic ramus and inferomedial border of the femural neck.Indication: Evaluation of femoral neck integrity and alignment.Thickening of this line is associated with Paget disease, Measurement: A linear bony ridge extending from the medial border of the iliac wing,Īlong the superior border of the superior pubic ramus,ĭefining the anterior column of the pelvis.Ĭonsider anterior column fracture of the acetabulum.Indication: Evaluation of anterior column.20: Ilioischial line (yellow) and iliopectineal line (green) lower sacroiliac joint is well seen on a pelvic outlet view.2 A normal sacroiliac joint will have a thin white line without erosionsorsclerosis(Fig.4).1,2 Earlysacroiliitismaydemon-strate erosions and apparent widening of the sacroiliac joint space.10 Subchondral sclerosis develops due to reactive changes in the bone. The axial space is commonly narrowed by inflammatory arthritis.įig. The superior joint space is usually reduced by degenerative diseases. Wider distance is associated with hip joint effusion. Criteria: Distance should not exceed 6 mm superiorly (s),.Measurement: Distance between the cortex of the femoral head and the acetabulum,.Indication: Evaluation of hip joint space.Criteria: Normal angle if intersection about 125 degrees.Ĭoxa valga - angle more than 130 degrees.Measurement: Angle formed between the lines along the axis of femoral neck (C) and shaft (D).17: Center-edge angle of Wiberg (yellow) and Femoral angle (blue)įemoral neck angle (or Caput-collum-diaphyseal angle (CCD angle)) Shallow angle is seen in Down syndrome and achondroplasia.įig. Criteria: Angle of intersection should not exceed standards based on age.Īngle above 47º suggests acetabular dysplasia and neuromuscular disorders.Measurement: Angle formed between an horizontal line at the inferior aspect of both pelvic teardrops (A) and a line from the inferior margin of the teardrop to the lateral margin of acetabular roof (B).Projection: Anteroposterior pelvic view.Indication: Measures acetabular inclination or opening and evaluates acetabular depth in potential developmental dysplasia of the hip.The pain can be worse at night, at rest or with strenuous activity, reducing the range of motion and limiting walking distance. Lines and Angles for Radiographic Evaluation of Hip JointĪcetabular index (or Acetabular angle of Sharp) Clinical presentation Patients usually experience slowly progressive hip pain, or hip-related groin pain radiating into the thigh, buttocks or knee. There are multiple lines and angles described in hip radiographic evaluation which provide diagnostic clues for several disorders (congenital,

Normal hip joint space xray