| 摘要 |
A radiation field control device and a radiotherapy device. Light limiting barrels (31) having more than two sizes are directly machined on a light limiting barrel support (3), or more than two light limiting barrel mounting portions are disposed on the light limiting barrel support (3), and the more than two light limiting barrels (31) are respectively disposed in the light limiting barrel mounting portions in a one-to-one corresponding manner. A light limiting barrel switching device (4) can move any light limiting barrel (31) to a working position. In this way, when the size of the light limiting barrel (31) needs to be changed, the light limiting barrel (31) can be replaced by directly controlling the light limiting barrel switching device (4) that does not need to be detached, thereby improving the work efficiency. |
