The power frequency X-ray machine uses 50Hz or 60Hz power frequency alternating current as the driving source of high voltage power supply. This X-ray machine has relatively simple structure, stable operation, low cost and convenient maintenance. In medical diagnosis, power frequency X-ray machine is mainly used to shoot static images, such as routine X-ray examination. However, the exposure time of power frequency X-ray machine is long, and the imaging effect of dynamic organs or structures is poor.
In contrast, high-frequency X-ray machines use thousands to tens of thousands of hertz of high-frequency alternating current as the driving source of high-voltage power supply. This X-ray machine can greatly shorten the exposure time, thus obtaining clearer dynamic images. High-frequency X-ray machine is mainly used for the examination of cardiovascular system, digestive tract and other dynamic organs, such as angiography and gastrointestinal angiography. At the same time, because of its short exposure time, the high-frequency X-ray machine can also reduce the radiation dose received by patients, which is conducive to improving medical safety.
Generally speaking, the selection of high-voltage power supply frequency of diagnostic X-ray machine mainly depends on the specific medical needs. When doctors choose to use power frequency X-ray machine or high frequency X-ray machine, they need to comprehensively consider the patient's specific situation, examination site, desired image quality and other factors. At the same time, when purchasing X-ray machines, medical institutions also need to consider performance, price, maintenance costs and patient needs.