Since the first of the nineteenth centuryCT tubeSince its birth, the tube family has also grown rapidly. According to its medical use, we divide them into two categories: diagnostic X-ray tubes and therapeutic X-ray tubes.

1. Diagnostic X-raysCT tube

The X-ray tube for diagnosis is used for fluoroscopy and photography. Although the power of the two working states is very different, the exposure time during photography is extremely small, so the total energy of the anode of the tube in the two working states is similar. Therefore, , Modern diagnostic X-ray tubes are cooled by radiators.

In order to obtain a clear X-ray image, the fundamental requirement for a diagnostic X-ray tube is: it should have a small focus and a large power focus, which can reduce geometric ambiguity, and the output power is large, and the exposure time can be shortened. Reduced movement ambiguity.

Of course, due to the limitation of the maximum allowable heat that the anode target surface can accept, it is difficult to meet the requirements of small focus and high power at the same time. The rotating anode X-ray tube can better handle this contradiction, so it is widely used. use.

(1) Diagnostic X-raysCT tubetype

1. Fixed anode X-ray The anode of this X-ray is fixed. Its power is small and the focus is large, and it is generally used for small-break X-ray machines.