"Beam collimators are 'beam direction' devices used in the x-ray tube housing, along with an arrangement of mirrors and lights, in such a way that the light and X-ray fields match each other. They are made of lead shutters, which completely absorb the photons, and thus reduce the patient dose as well as focus the radiation accordingly to the area of interest. They allow different projections of X-ray fields."
"Beam collimators are 'beam direction' devices used in the x-ray tube housing, along with an arrangement of mirrors and lights, in such a way that the light and X-ray fields match each other. They are made of lead shutters, which completely absorb the photons, and thus reduce the patient dose as well as focus the radiation accordingly to the area of interest. They allow different projections of X-ray fields."
Expected headings
"Linear accelerator collimation"