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Fig. 2 | Journal of Orthopaedic Surgery and Research

Fig. 2

From: Proper detailed parameters for S1 sacral alar iliac screw placement in the Chinese population, a 3D imaging study

Fig. 2

Case 2, 55-year-old female. 1 Posterior view of CT 3D imagine. A The entry point of S1AI trajectory. 2 Lateral view of CT 3D imagine. B The direction of S1AI trajectory. 4 Sagittal reconstructed plane of S1AI trajectory. C Sag. A: 62.0°; D Skin D.: 59.1 mm. 4 Transverse plane of S1AI trajectory. E Tsv. A.: 37.4°; F Max. L.: 121.1 mm; G Sac. L.: 43.1 mm. H Iliac W.: 14.5 mm; I Cortex D.: 2.0 mm; J Mid. D.: 24.7 mm; K PSIS D.: 19.8 mm

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