Linear accelerators are several kinds of ray devices.

Level 2 radiation device. Linear accelerator is a machine that uses high-frequency electromagnetic field to accelerate particles. It belongs to the second-class radiation device and is the main equipment of radiotherapy department. Mainly used for the treatment of systemic tumors, widely used. It can be used as the first choice for some tumors, such as nasopharyngeal carcinoma and laryngeal carcinoma.