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. 2021 Apr 14;16:256. doi: 10.1186/s13018-021-02400-x

Fig. 2.

Fig. 2

3D-FNA. a CT-reconstruction image of the pelvis and the distal and proximal femur. b 3D-FNA: the lowest point of the greater trochanter and the medial and lateral femoral condyles are located on a horizontal line by rotating the image. The angle between this horizontal line and the femoral neck axis is the 3D-FNA