Beam Stop Phantom

For the determination of the scatter distribution of X-ray cone-beam CT and to develop scatter correction techniques

  •  Convenient performance of scatter measurements in radiological setups
  •  Array of lead cylinders embedded in a PMMA plate

 

The Beam Stop Phantom consists of a regular array of lead cylinders embedded in a PMMA plate. Lead blockers offer an attenuation sufficient to prevent primary radiation reaching the detector. The Beam Stop Phantom is a convenient tool to experimentally determine the X-ray scatter-to-primary-ratio for a given measurement setup for analog and digital radiography.

 

The Beam Stop array is placed between the object and the X-ray source or between the object and detector.

A measurement of the signal level behind each blocker gives the scatter intensity, whereas a measurement without the phantom represents the total intensity (scatter and primary signal). Dividing both values results in the scatter fraction.

Beam Stop Phantom, QRM-10115

Phantom dimension: 240 mm x 240 mm  
Phantom height 5.5 - 6 mm  
Body material: PMMA  
Height: 5-6 mm
Diameter: 3 mm
Spacing: 20 mm

Related Downloads

Spec
Beam Stop Phantom ( 1 MB )
Catalog
QRM Phantoms for X-ray Imaging ( 5 MB )
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