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

Result code in 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>
Alternative codes found
RIV/68378297:_____/15:00450983
Result on the web
<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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Result language
angličtina
Original language name
Correction of the focal spot drifting in X-ray ?-tomography
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/LO1219" target="_blank" >LO1219: Sustainable advanced development of CET</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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