a circle comparison. position of radius (shown in red). radius, styloid process - anterior view radius, ulnar notch - posterior view radius, radial head – posterior view radius, radial head – anterior view radius l. dx. – ant. view radius l. dx. – post. view anterior surface of radius (at right) posterior surface of radius (at left) posterior view of right proximal radius posterior view of right distal radius medial view of right proximal radius medial view of right distal radius lateral view of right distal radius anterior view of right distal radius anterior view of right proximal radius