Moe, Yngve M.
Lloyd, Ryan
Tregidgo, Henry
Coban, Sophia B.
Gajjar,Parmesh
Behnsen, Julia
Turner, Martin
Lionheart, William R.B.
2016-09-02
<p>3-dimensional computerised tomography is usually reconstructed using the naïve Feldkamp-Davis-Kress algorithm or FDK, which is not an exact reconstruction algorithm. This caus-<br>
es image errors, or artefacts that appear out of the central slice, and are especially visible near edges between horizontal layers - this is demonstrated in Figure 1.<br>
To overcome these artefacts; one can perform multiple scans at different heights and combine the reconstructed volumes. However, exact reconstruction methods are necessary to<br>
remove them altogether. These algorithms will also reduce the scanning time which makes them very attractive. Such methods exist, and Alexander Katsevich provided an algo-<br>
rithm already in 2002[1]. His algorithm uses a helical scan-geometry, rotating the X-Ray source while moving it in parallel with the rotation axis - or, equivalently, scanning the ob-<br>
ject while rotating it and moving it parallel to its rotation axis. In this poster, we demonstrate that it is possible to perform and reconstruct such scans, with a Nikon XTEK scanner<br>
designed for circular scans.</p>
https://doi.org/10.5281/zenodo.61409
oai:zenodo.org:61409
Zenodo
https://zenodo.org/communities/ipuom
https://zenodo.org/communities/ccpi
https://zenodo.org/communities/mxif
https://doi.org/
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
ToScA, Tomography for Scientific Advancement, Bath, UK, 6-7 September 2016
helical scan
cone beam CT
Katsevick
Nikon Xtek
artefacts
Implementing an exact algorithm for Helical CT:Removing the cone-beam artefacts
info:eu-repo/semantics/conferencePoster