Radiation Shielding Material for Medical Treatment
I. X-ray pipe side collimator also called front collimator is mounted in front of a CT bulb pipe, and is the first part through which X rays pass. X rays emitting out of bulb pipes are conical, and can obtain a thin light beam  after passing through a tungsten device with narrow seams. Its main function is layer thickness selection of X rays. It can control the width of X ray beams in the parallel direction of long axis of a human body, thus controlling the thickness of scanning layers.