Radiographic optimization of the lateral position of the knee joint aided by CT images and the maximum intensity projection technique

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Abstract

Background: Standard lateral knee-joint X-ray images are crucial for the accurate diagnosis and treatment of many knee-joint-related conditions. However, it is difficult to obtain standard lateral knee-joint X-ray images in the current knee-joint lateral radiography position. Purpose: To optimize the lateral position of knee joint for radiography aided by computed tomography (CT) images and the maximum intensity projection technique. Materials and methods: One hundred cases of anteroposterior and lateral radiographs of knee joints were included. Of these, 50 cases were for lateral radiography in conventional position, and the other 50 cases were for lateral radiography in optimized position. The optimized position was acquired by a retrospective analysis of one hundred cases of knee-joint CT images. The quality of the X-ray images in optimized group was compared with those in conventional group. The data were statistically analyzed using the Mann–Whitney U test. Results: There were differences in the optimized position between males and females. The posterior condyles of the femoral epiphysis in optimized group were in perfect superimposition for most patients. However, the ones in conventional group were not. The average quality score of the lateral knee-joint X-ray images in optimized position was 3.76 ± 0.98, which is much higher than the 1.84 ± 1.15 score in conventional position. Moreover, the difference in the average quality score was statistically significant (P < 0.05). Conclusion: Optimization of the lateral position of knee joint for radiography is possible with the aid of CT images and the maximum intensity projection technique.

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Wang, S., Xiao, Z., Lu, Y., Zhang, Z., & Lv, F. (2021). Radiographic optimization of the lateral position of the knee joint aided by CT images and the maximum intensity projection technique. Journal of Orthopaedic Surgery and Research, 16(1). https://doi.org/10.1186/s13018-021-02740-8

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