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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/LO1219" target="_blank" >LO1219: Udržitelný pokročilý rozvoj CET</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Precision Engineering

ISSN

0141-6359

e-ISSN

—

Svazek periodika

54

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

107-117

Kód UT WoS článku

000452579900012

EID výsledku v databázi Scopus

2-s2.0-85047641667