Fig. 2A–B.

ROC curves of fluoroscopy in the pronation (A) and supination (B) positions are shown. Both curves showed good detectability of scapholunate injury with the area under the curve being at least 0.79. The cutoff point of the scapholunate gap at the left upper corner of each curve was approximately 2 mm in all the wrist positions, which was chosen as a diagnostic criterion of high-grade SLIL injury. PN = pronation neutral; PR = pronation radial deviation; PU = pronation ulnar deviation; SN = supination neutral; SR = supination radial deviation; SU = supination ulnar deviation.