MRI risk factors for development of avascular necrosis after closed reduction of developmental dysplasia of the hip: Predictive value of contrast-enhanced MRI
Fig 4
Abduction angle measurement on MRI.
Abduction angle is measured on the MEDIC image. Hip abduction angle is defined as the angle between the line along the mid-femoral shaft and the line connecting the posterior end of the ischial tuberosities (α angle).