Digital Radiography (DR)

Digital Radiography: A Brief History

Radiography has passed through three major stages of development: Film-Based, Computed Radiography (CR) and Digital Radiography (DR).

Radiography originally used film as the medium for the X-ray image. The film had to be developed and read on a light box. Later, Computed Radiography used image plates that were first scanned to a computer and then analyzed. Digital Radiography bypasses all these techniques. The digital detector (typically a flat panel detector [FPD] or linear diode array [LDA]) is connected to a computer where the image is displayed without the need for peripheral devices.

Digital Radiography: Multiple Advantages

Digital Radiography brings with it numerous advantages. It provides instant image preview with real-time image processing and enhancement, wider dynamic range with greater tolerance for over or under exposure, and does not require scanning or expensive film. DR also:

  • Operates several times faster than film by providing lower exposure lengths
  • Reduces the number of shots required due to sensitivity of the device by capturing a much greater range of thicknesses on a single shot
  • See more detail through higher contrast resolutions. VJT uses 16 bit image acquisition to provide 65,000 gray levels, as opposed to 256 with traditional film
  • Reduces staffing needs by automating and simplifying processes and defect recognition

Image Stitching with overlap for wide and large parts

Pioneers in Digital Radiography

DR shows wider latitude in a single image

VJT has provided DR solutions longer and has more digital integrations than any other company in the world. But we see our leadership as only a beginning.

Our X-ray 2.0 offering, built around our innovative and proprietary Vi3 software, reduces typical inspection times by up to 50-percent. Built with powerful image processing features such as ADR (Automatic Defect Recognition), our inspection software allows our customers to evaluate analog and digital radiographic data without operator intervention and require fewer human capital hours.

Calculate the ROI of DR

Even as DR becomes more prevalent, the misconception that it has higher upfront costs remains. In reality, DR is a much more economical technology. The following represents a return-on-investment (ROI) calculation for an actual customer (numbers have been rounded, calculated over a three year period for GAP depreciation):

Film Cost/Month
(includes processing)
$9,000DR Upgrade Cost
(includes annual service maintenance)
$102,400
Inspection Labor Cost/Month$21,000Inspection Labor Cost/Month$500
Total Inspection Annual Cost$360,000Total Inspection Annual Cost$40,133
Three Year Cost$1,080,000Three Year Cost$120,400

Annual Savings: $319,867
Entire Upgrade Paid Off in Less Than 3.9 months
ROI for One Year: 312%

The more you learn about DR, the more of its advantages you’ll discover. When you’re ready to harness its power for your company, contact VJ Technologies.

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