Computed tomographic artifact correction via beam hardening filters
An algorithm for correcting density errors in CT images by filtering the X-rays.
Physical-Chemical Mechanism of Action
Computed tomography (CT) uses X-rays, which are absorbed to different degrees by different materials. The polychromatic nature of these rays can lead to density errors, especially when different materials are close together in the layer.
Metallurgical Relevance & Risks in Welding
In the workshop, CT images of weld areas can be used to analyze quality and structure. Without artifact correction, false interpretations can occur, leading to errors in assessing the structure or hardness.
Workshop Practice & Instructions
To correct artifacts, a beam hardening filter is used. This filters the X-rays and equalizes their density. The exact setting of the filter depends on the specific CT equipment and the material being examined. It is important to check the filter settings and adjust them if necessary to ensure optimal image quality.