CT is the name of the machine, and low-dose scanning is a scanning method. They are not a concept. Low-dose scanning is characterized by low radiation dose when using this scanning method, but at the same time the imaging quality will be worse than that of ordinary CT scanning. Mainly used for lung scanning. Generally speaking, low-dose scanning is used for physical examination screening. Because the condition is uncertain, low-dose scanning can reduce the probability of radiation hazard. This is for the sake of patients' health. There is nothing to say about a normal CT scan, just a normal scan. Comparatively speaking, the radiation dose is higher than that of low-dose scanning. Ask questions again,