Publication detail

Voxel Size Calibration for High-resolution CT

ZEMEK, M. BLAŽEK, P. ŠRÁMEK, J. ŠALPLACHTA, J. ZIKMUND, T. KLAPETEK, P. TAKEDA, Y. OMOTE, K. KAISER, J.

Original Title

Voxel Size Calibration for High-resolution CT

Type

article in a collection out of WoS and Scopus

Language

English

Original Abstract

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.

Keywords

calibration, nano-CT, voxel size

Authors

ZEMEK, M.; BLAŽEK, P.; ŠRÁMEK, J.; ŠALPLACHTA, J.; ZIKMUND, T.; KLAPETEK, P.; TAKEDA, Y.; OMOTE, K.; KAISER, J.

Released

1. 2. 2020

Publisher

NDT.net

Location

Wels

ISBN

1435-4934

Book

The e-Journal of Nondestructive Testing

Edition number

Vol.25 No.02

Pages from

1

Pages to

8

Pages count

8

URL

BibTex

@inproceedings{BUT162258,
  author="Marek {Zemek} and Pavel {Blažek} and Jan {Šrámek} and Jakub {Šalplachta} and Tomáš {Zikmund} and Petr {Klapetek} and Yoshihiro {Takeda} and Kazuhiko {Omote} and Jozef {Kaiser}",
  title="Voxel Size Calibration for High-resolution CT",
  booktitle="The e-Journal of Nondestructive Testing",
  year="2020",
  number="Vol.25 No.02",
  pages="1--8",
  publisher="NDT.net",
  address="Wels",
  isbn="1435-4934",
  url="https://www.ndt.net/search/docs.php3?id=25109"
}