Absorption Correction for 3D Elemental Distributions of Dental Composite Materials Using Laboratory Confocal Micro-X-ray Fluorescence Spectroscopy.

Autor:	Bauer LJ; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany.; Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany., Wieder F; Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany., Truong V; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Förste F; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Wagener Y; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Jonas A; Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, 10587 Berlin, Germany., Praetz S; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Schlesiger C; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Kupsch A; Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany., Müller BR; Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany., Kanngießer B; Institute for Optics and Atomic Physics, Technical University of Berlin, Hardenbergstr. 36, 10623 Berlin, Germany.; Berlin Laboratory for innovative X-ray technologies─BLiX, Berlin 10623, Germany., Zaslansky P; Department for Operative, Preventive and Pediatric Dentistry, Charité─Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, 14197 Berlin, Germany., Mantouvalou I; Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, 12489 Berlin, Germany.
Jazyk:	angličtina
Zdroj:	Analytical chemistry [Anal Chem] 2024 May 28; Vol. 96 (21), pp. 8441-8449. Date of Electronic Publication: 2024 May 17.
DOI:	10.1021/acs.analchem.4c00116
Abstrakt:	Confocal micro-X-ray fluorescence (micro-XRF) spectroscopy facilitates three-dimensional (3D) elemental imaging of heterogeneous samples in the micrometer range. Laboratory setups using X-ray tube excitation render the method accessible for diverse research fields but interpretation of results and quantification remain challenging. The attenuation of X-rays in composites depends on the photon energy as well as on the composition and density of the material. For confocal micro-XRF, attenuation severely impacts elemental distribution information, as the signal from deeper layers is distorted by superficial layers. Absorption correction and quantification of fluorescence measurements in heterogeneous composite samples have so far not been reported. Here, an absorption correction approach for confocal micro-XRF combining density information from microcomputed tomography (micro-CT) data with laboratory X-ray absorption spectroscopy (XAS) and synchrotron transmission measurements is presented. The energy dependency of the probing volume is considered during the correction. The methodology is demonstrated on a model composite sample consisting of a bovine tooth with a clinically used restoration material.
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu