Preprocessing techniques for removing artifacts in synchrotron-based tomographic images

DOI: 10.1117/12.2530324

Authors: Nghia Vo (Diamond Light Source) , Robert C. Atwood (Diamond Light Source) , Michael Drakopoulos (Diamond Light Source)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: SPIE Optical Engineering + Applications, 2019
Peer Reviewed: No

State: Published (Approved)
Published: September 2019

Abstract: X-Ray parallel-beam micro-tomography systems at synchrotron facilities are mainly bespoke designs. Technical problems from a detector system can strongly affect the quality of reconstruction results. Radial lens distortion in the visible light optics causes streak artifacts which get stronger towards the edge of the image. The irregular response of the detector gives rise to a variety of stripe artifacts in the sonogram; full stripes, partial stripes, fluctuating stripes, and unresponsive stripes. These give rise to ring artifacts of different kinds in the reconstructed image. The scattering of the scintillation photons can cause artifacts which are similar to beam hardening artifacts and reduce the resolution of the image. Here we present our practical approaches to tackle each such problem. These approaches are easy to implement and have low computational cost. The algorithms are freely available as open-source software.

Journal Keywords: X-ray tomography; radial lens distortion; ring artifacts; scintillation photons; artifact removal algorithms

Subject Areas: Technique Development


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing