ToraSpot 1.0 – software for correction of the X-ray tube spot movement in tomographical projections

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F18%3A00500099" target="_blank" >RIV/68378297:_____/18:00500099 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.itam.cas.cz/Software/ToraSpot/index.html" target="_blank" >http://www.itam.cas.cz/Software/ToraSpot/index.html</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ToraSpot 1.0 – software for correction of the X-ray tube spot movement in tomographical projections

Popis výsledku v původním jazyce

During computed tomography (CT), a set of images is taken from different angles, covering usually one full rotation (360°). The set typically consists of hundreds to thousands of projections. Exposition of such an amount of projections takes a significant time (typically in order of tens of minutes to units of hours) and during this time, there can be drift in electrical (centering currents) as well as mechanical parameters (temperature effects, wearing out of the target) of the X-ray tube, manifesting themselves as a geometrical movement of the X-ray source with respect to the rotational axis. This movement can be significant in particular with high magnification, i.e., high-resolution micro CT, when there is a big ratio of the distances tube – detector and tube – object. The tube spot movement during acquisition of the projections affects the sharpness of the 3D reconstruction considerably, which of course leads to lower resolution then theoretically possible with the given magnification. It is therefore of a great interest to compensate the tube spot movement. Several methods have been introduced to compensate the effects of the spot movement in the scanned images. One of these methods relies on acquiring reference images repeatedly during the process of scanning and determining the shifts between them. After that, each projection can be shifted appropriatelly to compensate the spot movement effects. ToraSpot is a software with a GUI which allows a user-friendly calculation of the shifts between reference images and shifting of the projection images.

Název v anglickém jazyce

ToraSpot 1.0 – software for correction of the X-ray tube spot movement in tomographical projections

Popis výsledku anglicky

During computed tomography (CT), a set of images is taken from different angles, covering usually one full rotation (360°). The set typically consists of hundreds to thousands of projections. Exposition of such an amount of projections takes a significant time (typically in order of tens of minutes to units of hours) and during this time, there can be drift in electrical (centering currents) as well as mechanical parameters (temperature effects, wearing out of the target) of the X-ray tube, manifesting themselves as a geometrical movement of the X-ray source with respect to the rotational axis. This movement can be significant in particular with high magnification, i.e., high-resolution micro CT, when there is a big ratio of the distances tube – detector and tube – object. The tube spot movement during acquisition of the projections affects the sharpness of the 3D reconstruction considerably, which of course leads to lower resolution then theoretically possible with the given magnification. It is therefore of a great interest to compensate the tube spot movement. Several methods have been introduced to compensate the effects of the spot movement in the scanned images. One of these methods relies on acquiring reference images repeatedly during the process of scanning and determining the shifts between them. After that, each projection can be shifted appropriatelly to compensate the spot movement effects. ToraSpot is a software with a GUI which allows a user-friendly calculation of the shifts between reference images and shifting of the projection images.

Druh

R - Software

CEP obor

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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

Interní identifikační kód produktu

ToraSpot-1.0-2018

Technické parametry

Bezplatnou licenci poskytne Michal Vopálenský, vopalensky@itam.cas.cz

Ekonomické parametry

výrazné zlepšení rozlišení ve výsledném tomografickém modelu

IČO vlastníka výsledku

68378297

Název vlastníka

Ústav teoretické a aplikované mechaniky AV ČR, v. v. i.