Measurement of the X-ray computed tomography instrument geometry by minimization of reprojection errors - implementation on experimental data

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00492800" target="_blank" >RIV/68378297:_____/18:00492800 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.precisioneng.2018.05.007" target="_blank" >http://dx.doi.org/10.1016/j.precisioneng.2018.05.007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.precisioneng.2018.05.007" target="_blank" >10.1016/j.precisioneng.2018.05.007</a>

Result language
angličtina
Original language name
Measurement of the X-ray computed tomography instrument geometry by minimization of reprojection errors - implementation on experimental data
Original language description
A procedure for measuring the geometry of X-ray computed tomography (CT) instruments is applied to an experimental CT instrument. In this study, the geometrical measurement procedure is implemented with the CT2 reference object, comprising steel spheres with known center positions in a local coordinate frame affixed to a cylindrical carbon fiber framework. The procedure can be implemented with other sphere-based reference objects, provided the sphere center coordinates are known. The effects of number of acquired projections and rotation mode (stepped or continuous) on the quality of measured geometrical parameters are studied. Finally, the output of the geometrical measurement procedure is used to inform the physical adjustment of the experimental CT instrument to its ideal alignment. The effectiveness of the measurement procedure to correctly determine the instrument geometry is demonstrated from dimensional measurements performed on a tomographically reconstructed validation object from radiographs acquired under initial (misaligned) and adjusted (aligned) instrument geometry.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering

Project
<a href="/en/project/LO1219" target="_blank" >LO1219: Sustainable advanced development of CET</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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