fan beam


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fan beam

a geometric pattern produced by collimating a spatially extended x-ray beam with a long, narrow slit. Also called fan x-ray beam.
References in periodicals archive ?
As the tungsten blades of a collimator, located just beneath the X-ray tube, move from side to side, so the X-ray fan beam sweeps back and forth.
As the product is transported along the conveyor, it passes through the X-ray fan beam and absorbs some of the x-rays.
Engineered for shallow water coastal, lake and river fishing, the unique Fan Beam transducer delivers an extra wide view of the bottom.
An analysis of the integral kernels for two well-known fan beam CT reconstruction algorithms has been performed.
The gantry houses a linear accelerator, which delivers photon radiation in the shape of a fan beam as the ring is turning.
This is due to the fact that daily fan beam CTs have the same consistent CT numbers as any diagnostic CT scanner, and are just as suitable for highly accurate dose calculation.
The equipment provided under the joint program is Hologic's new ACCLAIM fan beam x-ray scanner.
True fan beam design used only by Hologic gives DELPHI the ability to image the entire lateral spine in just 10 seconds to assess a patient vertebral fracture status.
The thickness of the fan beam may be as small as 1 millimeter or as large as 10 millimeters.
With synchrotron radiation, the DEI method employs a single-energy fan beam of X-rays instead of the broad-energy beam of conventional radiography.
In rating TomoTherapy, MD Buyline wrote, "TomoTherapy is the only vendor for the CT-based linear accelerator which delivers radiation dose in a helical or fan beam fashion.
March 9 /PRNewswire/ -- Imaging Sciences International introduced today a new compact cone beam computed tomography (CBCT) system that provides unprecedented 3-D, digital imaging at half the cost of medical CT units and with less radiation to patients than traditional fan beam computed tomography systems.