Ring filtering

Octopus Reconstruction includes two different ring filters which work on two different levels. The first ring filter reduces small rings, induced by insufficient flat-field statistics and detector non-linearity. A second ring filter can be applied during reconstruction and evaluated immediately. This ring filter is able to reduce wide rings, typically present in flat-panel detectors.

  • A reconstructed slice of a pharmaceutical mini-tablet before (left) and after (right) second ring filter
  • A reconstructed slice of a pharmaceutical mini-tablet before (left) and after (right) second ring filter
  • A reconstructed slice of a homogeneous cylinder without (left) and with (right) pre-processing ring filter