Hi-Tech Testing utilizes the indirect capture method using phosphor imaging plates in the place of conventional film.
The image capturing process is similar to conventional radiography in most ways with a few key differences. A source
of radiation such as X-Ray, Selenium, Iridium or Cobalt is required. You still have to position the plate like you would
film, and expose it; however, the energy required to capture an image on the phosphor plate is much less than that
required for film. Exposure times can be 30-70% shorter depending upon the variables. This allows the use of
smaller, lower intensity sources thereby reducing the radiation area and the impact upon adjacent work. After the
required exposure, the plate is placed on the scanner and the image captured, digitized and displayed on the high
bit depth, high resolution monitor designed for the purpose. The monitor is the key for weld quality viewing since
the true sharpness of the image is dependent upon the monitor’s resolution and bit depth. Scanning takes
approximately one minute and the image is ready to evaluate. The digital image presents a dynamic range not possible
with conventional film as well as several other filters and tools that enable enhanced measurement and image
Computed Radiography is excellent for corrosion investigation using profile techniques due to the accurate
measurement capabilities and broad dynamic range. Advancements in image quality have made weld quality
examinations commonplace. Images can be saved and transferred via CD or disc drive for later viewing using the
Starrlite® viewer program. They can also be saved as a .jpeg for frozen image information and emailed.