[通过三维CT上的扭转角度辨别股骨颈前倾角（FNA）]
[Discerning the femoral neck anteversion (FNA) from the torsion angle on 3D CT].
作者信息
Zhu Qiu-Liang, Yuan Jian-Feng, Zhao Li-Lai, Wang Xin-Feng
机构信息
Department of Orthopaedics, the People's Hospital of Anji, Huzhou 313300, Zhejiang, China.
出版信息
Zhongguo Gu Shang. 2012 Oct;25(10):831-3.
OBJECTIVE
To discern the differences between femoral neck anteversion (FNA) and torsion angle through 3D CT reconstruction.
METHODS
From March 2010 to October 2010,30 healthy adult volunteers' femur were reconstructed by 3D CT, included 15 males and 15 females with an average age of (43.66 +/- 7.57) years old ranging from 25 to 65 years. Display the FNA and the torsion angle by image post-processing, measuring torsion angle by "Center way" and direct measurement of FNA.
RESULTS
FNA was the angle between the axle wire of femoral neck and the shape face of femoral,the angle were (13.326 +/- 6.085) degrees. Torsion angle was the angle between the macropinacoid of cross section of femoral neck and the shape face of femoral, the angle were(31.335 +/- 2.079) degrees. There was no significant difference in left and right femur.
CONCLUSION
FNA is different from torsion angle. FNA is the angle between the line and the surface with the sharp angle towards the lower outside. The torsion angle is the angle between the two surfaces with the sharp angle towards the lower back.
目的
通过三维CT重建辨别股骨颈前倾角（FNA）与扭转角之间的差异。
方法
2010年3月至2010年10月，对30名健康成年志愿者的股骨进行三维CT重建，其中男性15名，女性15名，平均年龄（43.66±7.57）岁，年龄范围为25至65岁。通过图像后处理显示FNA和扭转角，采用“中心法”测量扭转角并直接测量FNA。
结果
FNA为股骨颈轴线与股骨形态面之间的夹角，角度为（13.326±6.085）度。扭转角为股骨颈横截面大转子平面与股骨形态面之间的夹角，角度为（31.335±2.079）度。左右股骨之间无显著差异。
结论
FNA与扭转角不同。FNA是线与面之间的夹角，锐角朝向外下。扭转角是两个面之间的夹角，锐角朝向后下。
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