EXPERIMENTAL SCATTER CORRECTION METHODS IN INDUSTRIAL X‐RAY CONE‐BEAM CT

Scattered radiation presents a major source of image degradation in industrial cone‐beam computed tomography systems. Scatter artifacts introduce streaks, cupping and a loss of contrast in the reconstructed CT‐volumes. In order to overcome scatter artifacts, we present two complementary experimental correction methods: the beam‐stop array (BSA) and an inverse technique we call beam‐hole array (BHA). Both correction methods are examined in comparative measurements where it is shown that the aperture‐based BHA technique has practical and scatter‐reducing advantages over the BSA. The proposed BHA correction method is successfully applied to a large‐scale industrial specimen whereby scatter artifacts are reduced and contrast is enhanced significantly.