| Zugriffsnummer | 47992 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Validation of a fast and traceable radiographic scale calibration of dimensional computed tomography |
| Autor(in); Institution |
Sturm, Matthias; 4.2, Bild- und Wellenoptik, PTB-Braunschweig
Bircher, Benjamin A.; METAS, Bern-Wabern, SWITZERLAND
Meli, Felix; METAS, Bern-Wabern, SWITZERLAND
Bellon, Carsten; BAM, Berlin, GERMANY
Evsevleev, Sergeí; BAM, Berlin, GERMANY
|
| Quelle/Jahr | Measurement Science and Technology: 33 (2022), 9, 1 - 9 |
| Artikelnummer | 094007 |
| ISSN | 0957-0233 (print) ; 1361-6501 (online) |
| DOI | |
| Verlag | Bristol: IOP Publishing |
| Freie Schlagworte | industrial CT ; voxel size ; geometrical magnification ; dimensional metrology |
| Zusammenfassung | A fast and highly precise method of determining the geometrical scale factor of computed tomography (CT) measurements has been validated successfully by Bundesanstalt für Materialforschung und -prüfung (BAM), the Federal Institute of Metrology (METAS) and Physikalisch-Technische Bundesanstalt (PTB) within the scope of AdvanCT (Advanced Computed Tomography for dimensional and surface measurements in industry), a project funded in the European Metrology Programme for Innovation and Research (EMPIR). The method has been developed by PTB and requires only two radiographic images of a calibrated thin 2D standard (hole grid standard) from two opposite directions. The mean grid distance is determined from both radiographs. From this and with the help of the calibration result, the radiographic scale and therefore the voxel size is determined. The procedure takes only a few minutes and avoids a time-consuming CT scan. To validate the method, the voxel sizes determined via this method were compared with voxel sizes determined from CT scans of calibrated objects. Relative deviations between the voxel sizes in the range of 10-5 were achieved with minimal effort using cone-beam CT systems at moderate magnifications. |
| Themenbereich der Metrologie | Länge, dimensionelle Metrologie |
| Forschungsprojekt | 17IND08: AdvanCT: Advanced Computed Tomography for dimensional and surface measurements in industry |
| Förderinformationen (1) |
Förderername: European Commission (EC)
Förderer ID: 0000 0001 2242 8989 Förderer ID Typ: ISNI Förderprogramm: EMPIR 2017 Industry Titel der Förderung: 17IND08: AdvanCT: Advanced Computed Tomography for dimensional and surface measurements in industry Förderungsnummer: 17IND08 URI der Förderung: https://www.euramet.org/research-innovation/search-research-projects/details/project/advanced-computed-tomography-for-dimensional-and-surface-measurements-in-industry/?L=0&tx_eurametctcp_project%5Baction%5D=show&tx_eurametctcp_project%5Bcontroller%5D=Project&cHash=195de508abea69fbb481aca2f2a4f108 |
Zitierung
Neuschaefer-Rube, U., Illemann, J., Sturm, M., Bircher, B. A., Meli, F., Bellon, C., & Evsevleev, S. (2022). Validation of a fast and traceable radiographic scale calibration of dimensional computed tomography. Measurement Science and Technology, 33(9), 1–9. https://doi.org/10.1088/1361-6501/ac74a3