Correction of the focal spot drifting in X-ray ?-tomography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F15%3A00453551" target="_blank" >RIV/68378297:_____/15:00453551 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/15:00450983

Výsledek na webu

<a href="http://www.ceitec.eu/a5-abstracts-book-3d/f33102" target="_blank" >http://www.ceitec.eu/a5-abstracts-book-3d/f33102</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Correction of the focal spot drifting in X-ray ?-tomography

Popis výsledku v původním jazyce

Nowadays micro-focus X-ray tubes in conjunction with digital pixelated imagers are standardly utilized for micro-radiography; radiogram resolution can be even better than one micrometer with high projection magnification. The same requirement for computed tomography (CT) is not easy to fulfill due to time-dependent focal spot position drifting and tube thermal deformations. These effects can be significant especially for longtime measurement, which is necessary for high quality micro-CT. In this work, amethod for correction of this effect is proposed. The method is based on the regular recording of an object zero position throughout the tomographic sequence. A shift of the object between those images caused by the focal spot drifting is measured employing an image correlation technique. Obtained knowledge of the shift is included into calculations of the final reconstruction. A distinct improvement in reconstruction results is shown in the case of plastic composites.

Název v anglickém jazyce

Correction of the focal spot drifting in X-ray ?-tomography

Popis výsledku anglicky

Nowadays micro-focus X-ray tubes in conjunction with digital pixelated imagers are standardly utilized for micro-radiography; radiogram resolution can be even better than one micrometer with high projection magnification. The same requirement for computed tomography (CT) is not easy to fulfill due to time-dependent focal spot position drifting and tube thermal deformations. These effects can be significant especially for longtime measurement, which is necessary for high quality micro-CT. In this work, amethod for correction of this effect is proposed. The method is based on the regular recording of an object zero position throughout the tomographic sequence. A shift of the object between those images caused by the focal spot drifting is measured employing an image correlation technique. Obtained knowledge of the shift is included into calculations of the final reconstruction. A distinct improvement in reconstruction results is shown in the case of plastic composites.

Druh

O - Ostatní výsledky

CEP obor

JJ - Ostatní materiály

OECD FORD obor

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Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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