Radiographic pelvimetry is of limited value in managing most cephalic presentations.

大多数头先露时放射骨盆测量价值有限。

In this paper,one X-ray image autotrack system for weld radiographic inspection is introduced, and itsworking principle is described from the hardware and software.

介绍了一种焊缝X光图象自动识别跟踪系统。该系统用于焊缝的射线检测。从硬件和软件两个方面描述了系统的工作原理。