Neutron tomography is a form of computed tomography involving the production of three-dimensional images by the detection of the absorbance of neutrons produced by a neutron source.[1] It creates a three-dimensional image of an object by combining multiple planar images with a known separation.[2] It has a resolution of down to 25 μm.[3][4] Whilst its resolution is lower than that of X-ray tomography, it can be useful for specimens containing low contrast between the matrix and object of interest; for instance, fossils with a high carbon content, such as plants or vertebrate remains.[5]
Neutron tomography can have the unfortunate side-effect of leaving imaged samples radioactive if they contain appreciable levels of certain elements such as cobalt,[5] however in practice this neutron activation is low and short-lived such that the method is considered non-destructive.
The increasing availability of neutron imaging instruments at research reactors and spallation sources via peer-reviewed user access programs[6] has seen neutron tomography achieve increasing impact across diverse applications including earth sciences, palaeontology, cultural heritage, materials research and engineering. In 2022, it was reported in the journal Gondwana Research that an ornithopoddinosaur was serendipitously discovered by neutron tomography in the gut content of Confractosuchus, a Cretaceous crocodyliform from the Winton Formation of central Queensland, Australia.[7] This is the first time that a dinosaur has been discovered using neutron tomography, and to this day, the partially digested dinosaur remains entirely embedded within the surrounding matrix.[8]
See alsoedit
Winkler, B. (2006). "Applications of Neutron Radiography and Neutron Tomography". Reviews in Mineralogy and Geochemistry. 63 (1): 459–471. Bibcode:2006RvMG...63..459W. doi:10.2138/rmg.2006.63.17.
Schwarz, D.; Vontobel, P. L.; Eberhard, H.; Meyer, C. A.; Bongartz, G. (2005). "Neutron tomography of internal structures of vertebrate remains: a comparison with X-ray computed tomography" (PDF). Palaeontologia Electronica. 8 (30).
Mays, C.; Cantrill, D. J.; Stilwell. J. D.; Bevitt. J. J. (2017). "Neutron tomography of Austrosequoia novae-zeelandiae comb. nov. (Late Cretaceous, Chatham Islands, New Zealand): implications for Sequoioideae phylogeny and biogeography". Journal of Systematic Palaeontology. 16 (7): 551–570. doi:10.1080/14772019.2017.1314898. S2CID 133375313.
Referencesedit
^Grünauer, F.; Schillinger, B.; Steichele, E. (2004). "Optimization of the beam geometry for the cold neutron tomography facility at the new neutron source in Munich". Applied Radiation and Isotopes. 61 (4): 479–485. Bibcode:2004AppRI..61..479G. doi:10.1016/j.apradiso.2004.03.073. PMID 15246387.
^ abSutton, M. D. (2008). "Tomographic techniques for the study of exceptionally preserved fossils". Proceedings of the Royal Society B: Biological Sciences. 275 (1643): 1587–1593. doi:10.1098/rspb.2008.0263. PMC2394564. PMID 18426749.
^White, Matt A.; Bell, Phil R.; Campione, Nicolás E.; Sansalone, Gabriele; Brougham, Tom; Bevitt, Joseph J.; Molnar, Ralph E.; Cook, Alex G.; Wroe, Stephen; Elliott, David A. (2022-02-10). "Abdominal contents reveal Cretaceous crocodyliforms ate dinosaurs". Gondwana Research. 106: 281–302. Bibcode:2022GondR.106..281W. doi:10.1016/j.gr.2022.01.016. ISSN 1342-937X. S2CID 246756546.
^"Nuclear techniques confirm rare finding that crocodile devoured a baby dinosaur | ANSTO". www.ansto.gov.au. Retrieved 2022-02-18.
January 01, 1970
neutron, tomography, form, computed, tomography, involving, production, three, dimensional, images, detection, absorbance, neutrons, produced, neutron, source, creates, three, dimensional, image, object, combining, multiple, planar, images, with, known, separa. Neutron tomography is a form of computed tomography involving the production of three dimensional images by the detection of the absorbance of neutrons produced by a neutron source 1 It creates a three dimensional image of an object by combining multiple planar images with a known separation 2 It has a resolution of down to 25 mm 3 4 Whilst its resolution is lower than that of X ray tomography it can be useful for specimens containing low contrast between the matrix and object of interest for instance fossils with a high carbon content such as plants or vertebrate remains 5 Neutron tomography can have the unfortunate side effect of leaving imaged samples radioactive if they contain appreciable levels of certain elements such as cobalt 5 however in practice this neutron activation is low and short lived such that the method is considered non destructive The increasing availability of neutron imaging instruments at research reactors and spallation sources via peer reviewed user access programs 6 has seen neutron tomography achieve increasing impact across diverse applications including earth sciences palaeontology cultural heritage materials research and engineering In 2022 it was reported in the journal Gondwana Research that an ornithopod dinosaur was serendipitously discovered by neutron tomography in the gut content of Confractosuchus a Cretaceous crocodyliform from the Winton Formation of central Queensland Australia 7 This is the first time that a dinosaur has been discovered using neutron tomography and to this day the partially digested dinosaur remains entirely embedded within the surrounding matrix 8 See also editWinkler B 2006 Applications of Neutron Radiography and Neutron Tomography Reviews in Mineralogy and Geochemistry 63 1 459 471 Bibcode 2006RvMG 63 459W doi 10 2138 rmg 2006 63 17 Schwarz D Vontobel P L Eberhard H Meyer C A Bongartz G 2005 Neutron tomography of internal structures of vertebrate remains a comparison with X ray computed tomography PDF Palaeontologia Electronica 8 30 Mays C Cantrill D J Stilwell J D Bevitt J J 2017 Neutron tomography of Austrosequoia novae zeelandiae comb nov Late Cretaceous Chatham Islands New Zealand implications for Sequoioideae phylogeny and biogeography Journal of Systematic Palaeontology 16 7 551 570 doi 10 1080 14772019 2017 1314898 S2CID 133375313 References edit Grunauer F Schillinger B Steichele E 2004 Optimization of the beam geometry for the cold neutron tomography facility at the new neutron source in Munich Applied Radiation and Isotopes 61 4 479 485 Bibcode 2004AppRI 61 479G doi 10 1016 j apradiso 2004 03 073 PMID 15246387 McClellan Nuclear Radiation Center Neutron Tomography Paul Scherrer Institut Neutron Tomography NMI3 NMI3 a b Sutton M D 2008 Tomographic techniques for the study of exceptionally preserved fossils Proceedings of the Royal Society B Biological Sciences 275 1643 1587 1593 doi 10 1098 rspb 2008 0263 PMC 2394564 PMID 18426749 User facilities www isnr de Retrieved 2022 02 18 White Matt A Bell Phil R Campione Nicolas E Sansalone Gabriele Brougham Tom Bevitt Joseph J Molnar Ralph E Cook Alex G Wroe Stephen Elliott David A 2022 02 10 Abdominal contents reveal Cretaceous crocodyliforms ate dinosaurs Gondwana Research 106 281 302 Bibcode 2022GondR 106 281W doi 10 1016 j gr 2022 01 016 ISSN 1342 937X S2CID 246756546 Nuclear techniques confirm rare finding that crocodile devoured a baby dinosaur ANSTO www ansto gov au Retrieved 2022 02 18 Retrieved from https en wikipedia org w index php title Neutron tomography amp oldid 1196123347, wikipedia, wiki, book, books, library,
