What kind of collimator is used for the x ray machine?

What kind of beam limiter is used for the U-arm manual x ray collimator? What is the manual x ray collimator model for the U-arm?

The U-arm structure is designed as a vertical X–ray machine. It is the same as a normal X–ray machine. It requires a tube, a high-voltage generator, a manual x ray collimator for the U-arm, a high-voltage cable, and a U-arm is a device that uses a flat-panel detector. It is also possible to use IP boards and cassettes, but it is not convenient. The structural design of the U-arm makes it occupy a small space, but it can realize the conversion of the photographic part as quickly as possible, saving the shooting time, simple design, not simple function, reducing the failure rate of the whole machine, modular design, convenient maintenance . Its advanced flat panel detectors make the image clear.