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颧弓的投照常采用：（l）颧弓顶颌斜位；（2）颧弓轴位（颌下顶位）；（3）颧弓侧位；（4）面骨后前位。通过大量实践我们感到按第3种方法投照时，颧弓影象因和其他面骨重叠，常显示不清，按第1、2、4种方法投照时，颧弓因物片距离大而有失真。我们设计了颧弓40°斜位投照法，无面骨及颅底骨干扰，且因物片距离近而清晰，近于后前位的全颧弓影象。经大量实践．取得了良好的摄影效果，现将具体方法介绍如下；
The zygomatic arch cast often used: (l) zygomatic arch apex oblique; (2) zygomatic arch axis (submaxillary top); (3) zygomatic arch lateral position; Through a large number of practices we feel that the third method of exposure, the zygomatic bow image due to overlap with other facial bones, often show unclear, according to the first 1,2,4 kinds of methods when the vote, And there is distortion. We designed a zygomatic arch 40 ° oblique projection method, no bones and skull base bone interference, and because of the distance between the object film and clear, near the anterior whole zygomatic arch image. After a lot of practice. Made a good photographic effect, the specific methods are introduced below;