Ring artifact correction for high-resolution micro CT
- 6 August 2009
- journal article
- Published by IOP Publishing in Physics in Medicine & Biology
- Vol. 54 (17), N385-N391
- https://doi.org/10.1088/0031-9155/54/17/n02
Abstract
In high-resolution micro CT using flat detectors (FD), imperfect or defect detector elements may cause concentric-ring artifacts due to their continuous over- or underestimation of attenuation values, which often disturb image quality. We here present a dedicated image-based ring artifact correction method for high-resolution micro CT, based on median filtering of the reconstructed image and working on a transformed version of the reconstructed images in polar coordinates. This post-processing method reduced ring artifacts in the reconstructed images and improved image quality for phantom and in in vivo scans. Noise and artifacts were reduced both in transversal and in multi-planar reformations along the longitudinal axis.Keywords
This publication has 5 references indexed in Scilit:
- Comparison of ring artifact correction methods for flat-detector CTPhysics in Medicine & Biology, 2009
- Low contrast 3D reconstruction from C-arm dataPublished by SPIE-Intl Soc Optical Eng ,2005
- Reduction of ring artefacts in high resolution micro-CT reconstructionsPhysics in Medicine & Biology, 2004
- X-ray microtomography on beamline X at SSRLReview of Scientific Instruments, 1989
- Practical cone-beam algorithmJournal of the Optical Society of America A, 1984