Anteroposterior radiograph showing maximal radial bow and the location of maximal radial bow (calculated as a ratio of the distance from maximal radial bow to bicipital tuberosity to the distance from the bicipital tuberosity to the most ulnar aspect of the radius at the wrist). BB’: the distance from the bicipital tuberosity to the most ulnar aspect of the radius at the wrist, CC’: the maximal distance between the radius and ulna.