Fig. 1From: Anatomical conditions and patient-specific locked navigation templates for transverse sacroiliac screw placement: a retrospective studyMeasurements of anatomical conditions: a. 3D model of the sacrum; b. 3D model of the sacrum in transparent view; c. Maximum inscribed circle in the secure corridor; d. Lines through the centre of the maximum inner circle in the cancellous corridor (grey line), the long axis of the corridor (A, red line) and the short axis of the corridor (B, red line); e. Total corridor length, marked with a white lineBack to article page