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*Pelvic volar/dorsal tilt can be evaluated by lines drawn from the highest point of the ischium to the most prominent point of the symphysis, joining at the inside of the pelvis. The range of normal values is from 90 to 135° and is related to the infant’s age.<ref name="Ruiz SantiagoSantiago Chinchilla2016"/>

The most useful lines and angles that can be drawn in the pediatric pelvis assessing DDH are as follows:<ref name="Ruiz SantiagoSantiago Chinchilla2016"/>

*(E) The '''medial articular joint space''' is measured between the medial border of the femoral head or neck (when epiphysis is not ossified) and the acetabular platform. Normal values range between 5 and 12 mm. Differences greater than 1.5 mm between the two sides are considered abnormal.

[[File:X-ray of hip dysplasia in adult.jpg|thumb|X-ray of the hips of a 40-year-old female, with dysplasia of her right hip.]]