Optimization of the X-ray tube voltage with respect to the dynamical resolution in radiography and tomography

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00485983" target="_blank" >RIV/68378297:_____/18:00485983 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ndt.net/?id=21952" target="_blank" >http://www.ndt.net/?id=21952</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Optimization of the X-ray tube voltage with respect to the dynamical resolution in radiography and tomography

Popis výsledku v původním jazyce

The tube acceleration voltage influences the contrast in radiographic images. Let a specimen be considered made of a homogenous material, with variable thickness. The local differences in thickness cause contrast in the radiographic image of the specimen. To distinguish the thickness differences, or details, in the best possible way, it is necessary to maximize the contrast. The most straightforward approach to this task is to maximize the difference of the intensities of beams penetrating the object through its maximum and minimum thickness by setting the appropriate X-ray source / detector parameters. However, in case of tomography, the minimum thickness is zero in the majority of projections and a modified approach must be used. Additionally, the task gets more complicated when a real detector with quantizied (discrete) response is considered. This contribution introduces a mathematical model that allows setting the effective energy of the polychromatic X-ray beam from the point of view of contrast. It extends the model for small changes of thickness presented at iCT 2017 and subsequently in NDT.net. The predicted results are compared with experimental data.

Název v anglickém jazyce

Optimization of the X-ray tube voltage with respect to the dynamical resolution in radiography and tomography

Popis výsledku anglicky

The tube acceleration voltage influences the contrast in radiographic images. Let a specimen be considered made of a homogenous material, with variable thickness. The local differences in thickness cause contrast in the radiographic image of the specimen. To distinguish the thickness differences, or details, in the best possible way, it is necessary to maximize the contrast. The most straightforward approach to this task is to maximize the difference of the intensities of beams penetrating the object through its maximum and minimum thickness by setting the appropriate X-ray source / detector parameters. However, in case of tomography, the minimum thickness is zero in the majority of projections and a modified approach must be used. Additionally, the task gets more complicated when a real detector with quantizied (discrete) response is considered. This contribution introduces a mathematical model that allows setting the effective energy of the polychromatic X-ray beam from the point of view of contrast. It extends the model for small changes of thickness presented at iCT 2017 and subsequently in NDT.net. The predicted results are compared with experimental data.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

iCT conference 2018. 8th Conference on Industrial Computed Tomography, Wels, Austria (iCT 2018)

ISBN

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ISSN

1435-4934

e-ISSN

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Počet stran výsledku

8

Strana od-do

164

Název nakladatele

NDT.net

Místo vydání

Bad Breisig

Místo konání akce

Wels

Datum konání akce

6. 2. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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