Voxel Size Calibration for High-resolution CT

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F20%3AN0000081" target="_blank" >RIV/00177016:_____/20:N0000081 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26620/20:PU135523 RIV/00216305:26620/20:PU135525
Result on the web
<a href="https://www.ndt.net/search/docs.php3?id=25109" target="_blank" >https://www.ndt.net/search/docs.php3?id=25109</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Voxel Size Calibration for High-resolution CT
Original language description
In cone-beam X-ray computed tomography (CT), distances between the source, object, and detector influence the visual fidelity and voxel size of a reconstructed volume. Calibration using reference objects is an appropriate tool for preventing errors in the estimates of these distances. There is, however, a lack of such objects for high-resolution systems with a small field of view (FoV). In this work, we propose a method to measure the distances mentioned above, improving the determination of voxel size. We use a custom reference object suitable for a FoV of around one millimeter. Many approaches have been developed for this calibration task and discussed in the literature, but none apply to CT scanners with a small FoV and a cone-beam magnification close to one. The proposed method thus aims to provide a calibration procedure for such devices. A Rigaku Nano3DX CT scanner has been calibrated through this method and used for practical validation of the method's accuracy. Results have shown that this approach allows for accurate calibration, which leads to improvements in reconstruction quality and accuracy of voxel size determination.
Czech name
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Czech description
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Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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