Radiography is one of the oldest and most widely used methods of Non-Destructive Testing. Today, 2D digital X-ray imaging is used in many applications and industries. The technology is slowly replacing conventional film radiography usage. 2D digital radiography produces real-time 2D grayscale images that allows us to identify an objects:
X-ray radiation is generated by an X-ray source and after passing through the object, is captured by a digital detector that translates it into electronic signal and grayscale values. The variation in grayscale values inside the 2D Image illustrates the variations in density (or thickness) of a specimen.
The limitation of 2D X-ray imaging is its inability to provide precise information such as the depth and location of the inside features of an object. The solution to this is the use of 3D X-ray imaging or Computed Tomography (CT).
3D X-ray Computed Tomography (CT) is one of the most advanced X-ray inspection technique available in the imaging world and is one of the most widely used in Engineering and R&D environments in Industry, Material Science, Geoscience and Life Science. For research, CT is an excellent tool to support:
CT X-ray imaging is a non-destructive and non-contact technology for obtaining internal and external information of a specimen, while keeping the integrity of a specimen, part or material fully intact. CT scanners acquire 2D X-ray images of an object at different rotation steps throughout a single 360-degree scan rotation, the computer then synthesizes a stack of virtual cross section slices through the object using a reconstruction algorithm. Scrolling through cross sections and visualizing internal structures is now possible. 3D CT X-ray imaging is used in different industry / R&D sectors.