1·Hospital X-ray machines work by passing an X-ray pulse through a body onto radiographic film.
医院的X光机工作原理是X光射线脉冲穿过人体在射线胶片上感光成像。
2·Methods Compare the radiographic operation method, the image and the film success ratio of the original P-A Merchant view with those of the standing weight-bearing Merchant view.
方法通过对常规俯卧后前髌骨轴位和站立负重髌骨轴位的投照方法得出的影像及照片成功率加以对比。