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173 results for “X-ray Computed Tomography”
FIGURE 4 in First fossil representative of Cerylonidae (Coleoptera: Coccinelloidea) described using X-ray micro-computed tomography, from Eocene Baltic amber
FIGURE 4. Protostomopsis pandema gen. et sp. nov., paratype, No P3300.138 [RSKM]: A – habitus, ventrolateral view; B – details of abdomen showing apical margin of ventrite 5. Scale bars represent 0.5 mm for Fig. A, 0.1 mm for Fig. B.
High-resolution X-ray computed tomography images of Bentheim sandstone under elevated stress
<p>A dry sample of Bentheim (or Bentheimer) sandstone was characterized using 3D X-Ray microscopy (Versa XRM-500, XRadia-Zeiss) at three different confining pressures of 1 MPa, 20 MPa, and 30 MPa and two voxel sizes of (1.5854 µm)<sup>3</sup> and (3.3452 µm)<sup>3</sup>. The 5-mm-diameter, 20-mm-long dry sample was placed inside a custom-made pressure sell (Lebedev et al, 2017). The sample was subjected to confining pressure of 20 MPa and 3200 radiographs were acquired, then confining pressure was reduced to 1MPa and the sample was imaged again, finally, the sample was pressurized up to 30MPa and the final image set was taken. Image reconstruction was done using internal software (XRadia-Zeiss).</p>
X-ray Fluoroscopy Fused With Computed Tomography (XFC) Technical Development
ClinicalTrials.gov study NCT00965679. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Data from: X-Ray computed tomography of two mammoth calf mummies
Open the record for dataset details and reuse information.
Data from: X-ray computed tomography and its potential in ecological research: a review of studies and optimization of specimen preparation
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Raw data for "First ptychographic X-ray computed tomography experiment at the NanoMAX beamline"
<p>Raw data used in "First ptychographic X-ray computed tomography experiment at the NanoMAX beamline" by M. Kahnt, S. Sala, U. Johansson, Z. Jiang, S. Kalbfleisch, F. Lenrick, J. H. Pikul and K. Thånell, submitted to the journal of applied crystallography.</p>
Automated X-ray computer tomography segmentation method for finite element analysis of non-crimp fabrics reinforced composites
<p>Data behind the publications:</p> <p>Auenhammer, R.M., Mikkelsen, L.P., Asp, L., Blinzler, B. Automated X-ray computer tomography segmentation method for finite element analysis of non-crimp fabric reinforced composites. <em>Composite Structures, </em><strong>256</strong>, 113136, <a href="https://doi.org/10.1016/j.compstruct.2020.113136">https://doi.org/10.1016/j.compstruct.2020.113136</a>, 2021.</p> <p>Auenhammer, Robert M., Lars P. Mikkelsen, Leif E. Asp, Brina J. Blinzler, Dataset of non-crimp fabric reinforced composites for an X-ray computer tomography aided engineering process, <em>Data in Brief, </em><strong>33</strong>, 106518, <a href="https://doi.org/10.1016/j.dib.2020.106518">https://doi.org/10.1016/j.dib.2020.106518</a>, 2020.</p> <p>Auenhammer, R.M., L.P. Mikkelsen, L.E. Asp, B.J. Blinzler, X-ray tomography based numerical analysis of stress concentrations in non-crimp fabric reinforced composites - assessment of segmentation methods. <em>IOP Conf. Ser.: Mater. Sci. Eng.</em> <strong>942</strong>, 012038, <a href="https://doi.org/10.1088/1757-899X/942/1/012038">https://doi.org/10.1088/1757-899X/942/1/012038</a>, 2020</p> <p>The data-set contain data from three samples: A, E and G. </p> <p>For each sample the data are saved in the follow format</p> <ul> <li>X-ray scan: nii-files</li> <li>SEM scan: tif-files</li> <li>Abaqus files: inp-files </li> <li>X-ray setting: pdf-files</li> <li>SEM settings: hdr-ascii files</li> </ul> <p> </p>
Data from: How little data is enough? Phase-diagram analysis of sparsity-regularized X-ray computed tomography
We introduce phase-diagram analysis, a standard tool in compressed sensing (CS), to the X-ray computed tomography (CT) community as a systematic method for determining how few projections suffice for accurate sparsity-regularized reconstruction. In CS, a phase diagram is a convenient way to study and express certain theoretical relations between sparsity and sufficient sampling. We adapt phase-diagram analysis for empirical use in X-ray CT for which the same theoretical results do not hold. We demonstrate in three case studies the potential of phase-diagram analysis for providing quantitative answers to questions of undersampling. First, we demonstrate that there are cases where X-ray CT empirically performs comparably with a near-optimal CS strategy, namely taking measurements with Gaussian sensing matrices. Second, we show that, in contrast to what might have been anticipated, taking randomized CT measurements does not lead to improved performance compared with standard structured sampling patterns. Finally, we show preliminary results of how well phase-diagram analysis can predict the sufficient number of projections for accurately reconstructing a large-scale image of a given sparsity by means of total-variation regularization.
Data from: Letting the "cat" out of the bag: pouch young development of the extinct Tasmanian tiger revealed by X-ray computed tomography
The Tasmanian tiger or thylacine (Thylacinus cynocephalus) was an iconic Australian marsupial predator that was hunted to extinction in the early 1900s. Despite sharing striking similarities with canids, they failed to evolve many of the specialized anatomical features that characterize carnivorous placental mammals. These evolutionary limitations are thought to arise from functional constraints associated with the marsupial mode of reproduction, in which otherwise highly altricial young use their well-developed forelimbs to climb to the pouch and mouth to suckle. Here we present the first 3D digital developmental series of the thylacine throughout its pouch life using X-ray computed tomography on all known ethanol-preserved specimens. Based on detailed skeletal measurements, we refine the species growth curve to improve age estimates for the specimens. Comparison of allometric growth trends in the appendicular skeleton (fore- and hindlimbs) with that of other placental and marsupial mammals revealed that despite their unique adult morphologies, thylacines retained a generalized early marsupial ontogeny. Our approach also revealed mislabelled specimens that possessed large epipubic bones (vestigial in thylacine) and differing vertebral numbers. All of our generated CT models are publicly available, preserving their developmental morphology and providing a novel digital resource for future studies of this unique marsupial.
Figure 1 in The skull of the rare Malaysian snake Anomochilus leonardi Smith, based on high-resolution X-ray computed tomography
Figure 1. Three-dimensional reconstruction of the skull of Anomochilus leonardi (FRIM 0026) based on HRXCT data. A, lateral view; B, dorsal view; C, ventral view with lower jaw digitally removed; D, anterior view; and E, posterior view. Scale bar = 1 mm. See key for abbreviations.
Fig. 9 in Redescription and phylogenetic position of the enigmatic Neotropical electric fish Iracema caiana Triques (Gymnotiformes: Rhamphichthyidae) using x-ray computed tomography
Fig. 9. Pectoral girdle of left side of Iracema caiana (MZUSP 49205, 235 mm SL; pectoral fin rays digitally removed). (a) Lateral view; (b) Midsagittal view. Anterior to left. Scale bar is 5 mm. Abbreviations: pt+scl = posttemporal + supracleithrum; cl = cleithrum; co = coracoid; sc = scapula; mco = mesocoracoid; and ra = radials.
Fig. 43. Character 2 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 43. Character 2 (morphology of the caudalmost portion of the maxilloturbinal) optimized on the Meredith et al. (2009) topology. For character state 2.0, the caudal maxilloturbinal is simple in morphology and is attached to the nasal cavity wall or floor. For character state 2.1, the caudalmost portion of maxilloturbinal becomes an enclosed tube that tapirs into a cone that is unattached to the nasal cavity. States for this character are illustrated in figure 38.
Fig. 41 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 41. Coronal CT images showing differences in the morphology of the ventralmost ectoturbinal (char. 20). (A) ventralmost ectoturbinal bifurcates (char. 20.0), Didelphis virginiana, C464 (TMM M-2517); (B) ventralmost ectoturbinal does not bifurcate (char. 20.1), Dendrolagus lumholtzi, C280 (AMNH 65254). Both scale bars equal 5 mm. Abbreviations: Ecto, ectoturbinal; Endo, endoturbinal; NPM, nasopharyngeal meatus; ONS, ossified nasal septum; SER, sphenethmoid recess.
Fig. 37 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 37. Digital rendering of the isolated right maxilloturbinal from Phascolarctos cinereus (TMM M- 2946) shown in (A) lateral, (B) rostral, (C) medial, and (D) caudal views. Labels indicate caudal and rostral ends of the maxilloturbinal for the lateral and medial views. Scale bar equals 1 cm.
Fig. 44. Character 16 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 44. Character 16 (presence or absence of rostral portion of endoturbinal I) optimized on Meredith et al. (2009) topology. For character state 16.0, the rostral portion of endoturbinal I is present. For character state 16.1, the rostral portion is absent. States for this character are illustrated in figure 39.
Fig. 46. Character 11 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 46. Character 11 (presence or absence of an uncinate process of nasoturbinal) optimized on Meredith et al. (2009) topology. Character state 11.0 is the presence of an uncinate process; 11.1 is the absence of the uncinate process. States for this character are illustrated in figure 14. Abbreviation: NA, not applicable.
Fig. 32 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 32. Coronal CT images showing caudalmost attachment of the maxilloturbinal (char. 3). (A) maxilloturbinal attaches to the floor of the nasal cavity (char. 3.0), Phalanger orientalis, C201 (AMNH 157211); (B) maxilloturbinal attaches to the lateral wall of the nasal cavity (char. 3.1), Macrotis lagotis, C370 (AMNH 74486). Both scale bars equal 5 mm. Abbreviations: Endo, endoturbinal; ONS, ossified nasal septum.
Fig. 10 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 10. Coronal CT images showing the morphology of the ossified rostral nasoturbinal (char. 6). (A) rostral nasoturbinal is well developed as a slender ventromedial directed process (char. 6.0), Dasyurus hallucatus, C160 (TMM M-6921), scale bar equals 5 mm; (B) rostral nasoturbinal is a small, robust bony process with a ventromedial inflection (char. 6.1), Dromiciops gliroides, C136 (FMNH 127463), scale bar equals 1 mm. Abbreviations: Endo, endoturbinal; ONS, ossified nasal septum.
Fig. 17 in Comparative Morphology Of The Internal Nasal Skeleton Of Adult Marsupials Based On X-Ray Computed Tomography
Fig. 17. Coronal CT slice through the nasal cavity of Didelphis virginiana, C432 (TMM M-2517) showing two different terminology schemes for naming ectoturbinals and endoturbinals. Left side of figure is labeled with terminology following Allen (1882), which is used in this paper. Right side of figure is labeled using terminology of Paulli (1900a). Scale bar equals 5 mm. Abbreviations: Ecto, ectoturbinal; Endo, endoturbinal.
Figure 5 from: Schmitt M, Uhl G (2015) Functional morphology of the copulatory organs of a reed beetle and a shining leaf beetle (Coleoptera: Chrysomelidae: Donaciinae, Criocerinae) using X-ray micro-computed tomography. In: Jolivet P, Santiago-Blay J, Schmitt M (Eds) Research on Chrysomelidae 5. ZooKeys 547: 193–203. https://doi.org/10.3897/zookeys.547.7143
Figure 5 - Donacia semicuprea. Volume rendering of the virtual sections – sagittal, right to the median – through the abdomina of a mating pair. The opening of the bursa copulatrix (circle) is armed with a conspicuous ring muscle. C: the compound muscle inserting at the manubrium and extending to the lateral rims of the basal orifice of the median lobe; M: median lobe; P: paramere.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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