Background/Aim: Proper radiographic documentation of implant alignment is needed to analyse malrotation and malpositioning. We examined whether intraoperative fluoroscopic images can achieve more accurate image quality than postoperative radiographic X-ray images. Patients and Methods: We prospectively analysed 30 consecutive patients after total knee arthroplasty (TKA). We compared intraoperative fluoroscopic images with postoperative radiographic X-ray images. Radiation exposure was documented. Results: Fluoroscopic anterior-posterior images could achieve accurate image quality in 77% compared to 60% in radiographic images (p=0.016) and 54% compared to 34% on lateral view, respectively (p=0.008). Very good intra-observer correlation for fluoroscopic images could be achieved for femoral α angle with 0.84. Radiation exposure was 0.087+/-0.128 mGy. Conclusion: We observed significantly better image quality in fluoroscopic images than in radiographic X-ray images. The observed radiation exposure is lower than those expected for radiographic X-ray images. We conclude that fluoroscopic images can produce higher image quality and decreased radiation exposure.

中文翻译：

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与初次全膝关节置换术后患者的 X 射线 X 射线图像相比，透视术中图像产生更高的图像质量并减少总辐射暴露

背景/目的：需要适当的种植体对齐放射照相记录来分析旋转不良和错位。我们检查了术中透视图像是否可以获得比术后 X 射线图像更准确的图像质量。患者和方法：我们前瞻性地分析了全膝关节置换术（TKA）后的 30 名连续患者。我们将术中透视图像与术后 X 射线 X 射线图像进行了比较。记录了辐射暴露。结果：透视前后图像的准确图像质量分别为 77% 和 60%（p=0.016）和 54%，侧视图为 34%（p=0.008）。对于股骨 α 角，可以实现非常好的透视图像的观察者内相关性，为 0.84。辐射暴露为 0.087+/-0.128 mGy。结论：我们观察到透视图像的图像质量明显优于 X 射线图像。观察到的辐射暴露低于射线照相 X 射线图像的预期。我们得出结论，透视图像可以产生更高的图像质量并减少辐射暴露。