Digital Detector Array Radiographic Testing – DDA RT

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  9. Digital Detector Array Radiographic Testing – DDA RT

IRISNDT applies DDA RT to obtain clear images of the cross-sections of components (many while in operation, and with insulation). Unlike Computed Radiography (CR), with DDA one can see an image immediately without processing through a computer. Different than traditional RT with film, an image develops without processing (and immediately). The digital image serves as a chronological record of the condition of the component; it can be stored, accessed, and compared as easily as any other digital data.


  • Monitoring pitting and overall losses of piping through profile images (shadow shots)
  • Examining insulated and non-insulated piping components
  • Examining for corrosion under insulation
  • Monitoring the erosion/corrosion losses of components within insulated piping
  • Allowing personnel from multiple remote locations to view the data on FTP sites
  • Monitoring the operating (open/close) condition of valves
  • Examining rubber components for fabrication flaws
  • Assessing geophysical core samples


  • Saves time and improves productivity over conventional film applications. The exposure time is usually much shorter than that needed for film
  • Views multiple components (valves, pipe, fittings and threaded parts) all in the same image
  • Reduces the number of shots (and radiation time) needed to assess piping conditions
  • Can adjust brightness and contrast
  • Can magnify and process images
  • Can measure dimensions and calculate remaining thickness values
  • Can improve image evaluation
  • Operates on 120 volt or on battery power
  • Works with Ir-192, Co-60, and X-Ray sources


  • Radiation safety considerations are the same for DDA RT as standard radiography
  • Physical space and on-site electrical power are required to set up the equipment
  • Requires access to both sides of the part

Safety is a fundamental consideration when using radiation. Clearance of large areas adjacent to the component from persons or items that may be affected by radiation is required. A significant radiation dose can cause physical changes in the human body. Strict regulations, coupled with highly trained and qualified personnel, ensure the safety of everyone.

Download the brochure

Learn more about how IRISNDT applies DDA