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按常规投照技术要求摄取的髌骨轴位片，常因中心线入射角度或入射点选择不准确而导致摄影失败。这与膝关节和髌股关节解剖特征和活动规律有关。根据关节的上述特征设计的“仰卧位髌骨轴位投照技术”改变摄影体位和中心线调整方法，使髌骨轴位摄影操作简单化，中心线调整方式的可操作性增强．经过67例的摄影实践，证明使用这种技术，单侧和双侧髌骨轴位摄影照片优质率分别为80％和90％，照片优质串明显提高。采用这种技术患者体位舒适，容易配合，在屈膝30～70度之间均可获得满意的髌骨轴位影像。
According to the technical requirements of conventional projection of the patellar axial slice, often due to the centerline angle or point of entry is not accurate and lead to failure of photography. This knee and patellofemoral joint anatomy and activity of the law. According to the above characteristics of the joint design “supine patellar axial projection technology” to change the photography position and centerline adjustment method, the patellar axis photography simplifies operation, the centerline adjustment method of operability enhancement. After 67 cases of photographic practice, the use of this technology to prove that high-quality unilateral and bilateral patellar axial photography photos were 80% and 90%, photo quality string significantly improved. With this technique, the patient is comfortable and easy to fit, and a satisfactory patellar axial image can be obtained between 30 and 70 degrees of flexion.