What is the Cobb angle in X ray?
The Cobb angle is used to quantify scoliosis. Visually identify the vertebrae at the top and bottom of the curvature on a frontal radiograph of the spine. Draw a line parallel to the superior endplate of the top vertebral body and a line parallel to the inferior endplate of the lower vertebral body. The angle at the intersection of these two lines is the Cobb angle. Scoliosis is generally considered to be present when the Cobb angle is ≥10°.
