What principles should be followed in the adjustment of tube voltage and tube current photography time of X-ray machine?

The principle of choosing large and small focus. According to Baidu Encyclopedia, the adjustment of X-ray tube voltage tube current photography time needs to conform to the principle of size focus selection. On the premise that the X-ray tube capacity specification allows the load, try to choose a small focus to improve the clarity of the photo image and reduce the geometric blur, so it is necessary to conform to the principle of selecting large and small focus.