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Non-Destructive Inspection
Radiography by selective detection (RSD) allows for preferential detection of backscatter components that are responsible for improving image contrast. This is accomplished through a set of specially designed detectors and both fixed and movable detector collimators. An example of RSD is lateral migration radiography (LMR). The LMR approach is based on image contrast generated by the lateral migration of scattered x-rays in directions perpendicular to the radiation illumination beam. This technique has been used successfully to detect buried landmines and flaws and defects in aluminum, plastics, honeycomb laminates, reinforced carbon composites, steel, and titanium. LMR has been used to detect variations in composition, including corrosion, and to detect flaws as small as 50 microns in height, 1 mm in width and 1 cm long in samples of actual aircraft components.

  • Single-sided image
  • Easy to read and interpret
  • Industrial proven technology
  • Patented radiography by
  • selective detection
  • Improved subsurface resolution
  • Improved subsurface contrast
  • Depth information
  • Land mine detection
  • Flaw detection
  • Cracks and voids
  • Delaminations
  • Corrosion
  • Deposits
  • Adhesive thickness
  • Materials
  • Boric acid residue
  • Plastics
  • Reinforced carbon-carbon composites
  • Space shuttle external tank foam
  • Honeycomb structures (Aircraft wings)
  • Laminates
  • Aluminum & titanium alloy
  • FOD inspections
  • Security applications


Backscatter X-Ray RSD is a proven technology that has been tested on a wide
variety of materials and applications. The focus of RSD has been one-sided
detection for applications where conventional non-destructive examination
methods either will not work or give poor results. Acquired images have clearly
shown, for a variety of conditions, that proper selection of x-ray field scatter
 components leads to a significant improvement in image quality and contrast.
Improvements are significant enough in some cases that objects not visible to
conventional CBI or transmission radiography become readily discernable with
 LMR or RSD.
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