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Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Fig. 2 | Journal of Orthopaedics and Traumatology

Fig. 2

From: Investigation of bone quality of the first and second sacral segments amongst trauma patients: concerns about iliosacral screw fixation

Fig. 2

Axial CT sections demonstrating the technique for ROI placement as described in the methods section. a Horizontal reference lines at S1 (blue). b Vertical midline reference line at S1 (green dashed). c Vertical reference line tangential to the medial border of the sacral foramina at S1 (red dashed). d Placement of ROIs at 25 and 75 % of the vertical midline distance and 50 % of the vertical lateral distance at S1 (white). e–h The same technique at S2 (color figure online)

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