Waters法,在颌面骨骨折的诊断上是不可缺少的X线摄影法,但因交通事故所致的严重的头面部外伤,多数伴有头部、胸部、腹部、四肢等复杂的合并伤,在这种情况下,患者不能俯卧,以往采用常规的Reverse-Waters方法进行摄影。但因被照体离胶片远,骨折线不明显,往往不能正确的诊断,本文介绍一种X线从摄影台下投照的仰卧位Waters摄影法。使用机器和方法1、利用Under-tube型X线摄影机的方法:Under-tube型(线源在台下的装置)X线TV机,主要用于消化道的透视和血管造影等。因X线 Waters method, in the diagnosis of maxillofacial fractures is indispensable X-ray photography, but due to traffic accidents caused by severe head and face trauma, most associated with head, chest, abdomen, limbs and other complex injuries, In this case, the patient can not be prone and the conventional Reverse-Waters method was used for photography. However, because the subject is far from the film, the fracture line is not obvious, often can not be correctly diagnosed, this article describes a X-ray projection from the stage under the supine position Waters photography. The use of machines and methods 1, the use of Under-tube X-ray camera method: Under-tube type (line source at the device) X-ray TV machine, mainly for digestive fluoroscopy and angiography. Due to X-ray