Beam Hardening Effect

Since the X-ray CT scan we are using a continuous X-ray, and it will continue to harden the radiation quality when the X-ray pass through the object. Thus, the penetrating power of X-ray will continue to increase. It also the case of metal artifact.

Therefore, X-ray transmit thorough the long length of the sample (objects) more than the theoretical value. In the case of a cylindrical object, it will occur phenomenon that CT value of the central portion is increased.

As a countermeasure, use the correction data when performing the X-ray CT scans. Cupping effect phenomenon occurs when the correction is not enough.

The problems occurred by Beam-hardening (Cupping effect) are:

  • Unable to examine the defects/shapes., etc at the area where beam-hardening occurred and covered.  
  • Unable to get the accurate shapes/size/etc, since the shape is differ from the original object.
  • Unable to conduct accurate 3D measurement, since unable to get accurate value for the measurements.
  • Others

Beam Hardening Effect – TomoShop®, X-ray CT software with competitive features.

☞Go to “Artifact Reduction” page.