CT三维成像技术测量下肢扭转畸形

Measurement the torsion deformity of lower limbs with CT three - dimensional imaging

目的:探讨下肢扭转畸形的影像学测量方法,为临床精确测量及治疗提供依据。方法:本研究利用CT三维立体成像技术对19例膝骨关节炎的病人进行下肢扭转畸形测量,主要测量股骨前倾角、膝扭转角、胫骨扭转角、肢体扭转角,并与正常人及股骨干燥标本前倾角数值进行对比。结果:CT三维立体成像技术测量的前倾角与干燥标本的前倾角之间无明显差异。骨关节炎病人的前倾角、膝扭转角较对照组明显增大。结论:①CT三维立体成像技术可以对下肢扭转畸形进行较为精确的测量。②扭转畸形是膝骨关节炎的一种重要的致病因素,应引起高度重视。

Objective:To investigate the radiological measurement of the torsion deformities of lower limbs and provide data for clinic accurate measure and treatment. Methods: CT 3D imaging of the torsion of the lower limb in 32 os-teoarthritic knee ( nineteen patients) was compared with that of 24 asymptomatic knees to identify the cause of os-teoarthritis. And the femoral torsion, rotation of knee joint, tibial torsion and limb torsion were measured by CT 3D. The anteversion of the femur measured by CT was compared with that of 18 cadavers by anatomic methods. Results: Antever-sion of the femur and torsion of the knee joint were significantly greater in the arthritic knees than in the control group( P < 0.05). The knee joint torsion increased, which resulted in disorder of the knee joint and transform of the stress on local of the articular surface and was responsible for osteoarthritis finally. Conclusion: The torsion of knee joint is the main cause of osteoarthritis. The CT 3D imaging is the accurate way to measure lower limbs torsion.