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髁突经咽侧位片可以清晰显示髁突骨质的变化，但其投照难度较大。在诸多影响髁突显示的因素中区分出主次将对临床工作有较大指导意义。本文对３９０侧（１６９例）颗突经咽侧位片和薛氏位片进行了详细的测量统计。结果表明关节形态对于照片效果的影响较小，而投照技术是主要影响因素，其一最主要的是ｘ线角度。特别应注意使病人的头部矢状面与胶片平行，而不能仅为矢状线与胶片平行。同时注意ｘ线入射点准确无误，再用手指触摸被照髁突，以确保其稳定于关节前结节下方。最后，使ｘ线球管尽量贴近对侧皮肤。
Condylar pharyngeal lateral radiographs can clearly show changes in the condylar bone, but its projection is more difficult. In many factors that affect the condyle to distinguish between primary and secondary clinical work will have greater guiding significance. In this paper, 390 sides (169 cases) of the pelvic pharynx and Xue tablets were measured in detail. The results showed that the effect of joint morphology on the photographic effect is small, and projection technology is the main influencing factor. One of the most important is the x-ray angle. In particular, care should be taken that the sagittal plane of the patient's head is parallel to the film, not just the sagittal line parallel to the film. At the same time pay attention to the x-ray point of entry is correct, and then touch the condyle by finger touch to ensure that it is stable below the anterior nodules. Finally, the x-ray tube as close to the contralateral skin as possible.