beam collimation

beam collimation

the restriction of x-radiation to the area being examined or treated by confining the beam with metal diaphragms or shutters with high radiation-absorption power. In addition to protecting the patient and others from scatter radiation, beam collimation reduces radiographic density.
References in periodicals archive ?
The system enables the delivery of individual layers of pencil beam spots to precise locations, eliminating the need for beam collimation and compensators to adjust the target area.
Should the procedure be prolonged unexpectedly, the radiologist should consider enlarging the X-ray field size or altering the X-ray beam collimation.
Pitch is the distance the table travels per rotation divided by the beam collimation.
The advanced dose calculation solution from BrainLAB is based on the Monte Carlo method of modeling the transport of radiation through a beam collimation system (micro multi-leaf collimator, or MLC) and through human tissue.
Mechanical or optical x-ray beam collimation in conjunction with video camera alignment allows confirmation of specific analysis areas/ features.
At the heart of the system is the new ARIS(TM) Ion Source, which provides exceptional ion beam collimation necessary for within wafer uniformity.
It is based on a low-power laser with excellent beam collimation and intensity that can sustain path lengths up to 300 feet.