笔者就膝关节常规正、侧位进行三组曝光，并与铝梯做对应测试研究。
We have carried out three sets of knee joint exposure:normal front position and two side positions, and studied in comparison with respective aluminum wedge exposure tests.
实验用兔44只，每兔术后均将一侧膝关节固定于自然屈曲位6周。
One knee joint of each of 44 rabbits was immobilized with the splint in natural flexion position for 6 weeks.
常规行膝关节正侧位X线片、CT扫描及三维重建。
The X-ray films, CT scanning, and three-dimensional reconstruction were performed.
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