Fig. 8From: Standard radiographic values for the acetabulum in Japanese adolescents: a cross-sectional studyVertical subluxation. Vertical subluxation is defined as the vertical distance (indicated by the up/down arrow) from the most inferior point of the acetabulum to the most inferior point of the femoral head. In cases in which the most inferior point of the femoral head is above the most inferior point of the acetabulum, the measured value is defined as negativeBack to article page