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1,053 results for “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>
FIG. 9 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 9. Violin plots representing body sizes for males and females Mexican Burrowing Toads (Rhinophrynus dorsalis) across the 4 Mexican states that had Ž5 males and 5 females. Sample sizes are presented above each plot.
FIG. 8 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 8. Monthly distribution of body sizes for 36 females, 107 males, and 266 juveniles of the Mexican Burrowing Toad (Rhinophrynus dorsalis) from México. Points are jittered for visual clarity between overlapping values.
FIG. 10 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 10. The relationship between body size and latitude in the Mexican Burrowing Toad (Rhinophrynus dorsalis) from México (n = 163). Grey shading indicates the 95% confidence interval. The equation for the line: y = 65.2 - 0.95x.
FIG. 6 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 6. Monthly ovarian cycle of female Mexican Burrowing Toads (Rhinophrynus dorsalis) from México. See text for details on reproductive stages.
FIG. 5 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 5. Monthly frequency of food presence in the stomach, extensive fat in the body cavity, and well-developed livers in the Mexican Burrowing Toad (Rhinophrynus dorsalis) from México by male (A), female (B), and ovarian stage (C). Asterisks (*) next to a month indicate that no specimens were available for examination.
FIG. 4 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 4. Monthly distribution of testis length and width as a percentage of male body size in 107 Mexican Burrowing Toads (Rhinophrynus dorsalis) from México. Points are jittered for visual clarity between overlapping values.
FIG. 2 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 2. Monthly incidence of Mexican Burrowing Toads (Rhinophrynus dorsalis) captures from México based on museum specimens and community science observations. (A) All specimen records available on VertNet that possessed month of capture data. (B) Specimens examined in this study separated by sex and life stage, which included 495 individual tadpoles (June and July) collected as lots cataloged under single specimen tags, and a series of 48 juveniles (November) cataloged in the same manner. Monthly rainfall (mean ± standard error) displayed on the third axis. Precipitation values were taken from the Mexican states where 90% of our specimens were collected (Guerrero, Veracruz, Tabasco, and Chiapas). (C) All Research Grade observations (i.e., verified by an independent observer) recorded as on iNaturalist.
FIG. 3 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 3. Body size distributions of female and male Mexican Burrowing Toads (Rhinophrynus dorsalis) from México. Violin plots representing body sizes for all males and females in our sample. Sample sizes are presented above each plot. Dashed line indicates the sample mean. Filled circles represent gravid females (ovarian stage 4).
FIG. 1 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 1. Geographic origin of museum specimens in México of the Mexican Burrowing Toad (Rhinophrynus dorsalis) examined in this study. Sample sizes are given in parentheses after the Mexican state. Bottom left: Picture of R. dorsalis by M. Pingleton with permission.
FIG. 7 in Validation of hemodynamic stress calculation in coronary computed tomography angiography versus intravascular ultrasound.
FIG. 7. The relationship between clutch size and body size in 12 female Mexican Burrowing Toads (Rhinophrynus dorsalis) from México. Grey shading indicates the 95% confidence interval. The equation for the line: y = -6,100 + 170x. Silhouettes modified from Eisermann (2017) and drawn to scale relative to each other.
Micro computed tomography images of capillary actions in natural sand
<p>The present work investigates the effect of both surface roughness and particle morphology on the retention behaviour of granular materials. To study this, X-ray micro-computed tomography tests were performed on two types of spherical glass beads (i.e. smooth and rough) and two different sands (i.e. natural and roughened). Each sample was subjected to either drainage or soaking paths consisting in a multiphase ‘static’ flow of potassium iodine (KI) brine (wetting phase) and dry air (non-wetting phase). Tomograms were taken at different saturation states ranging from fully brine saturated to air dry conditions. </p>
Micro computed tomography images of capillary actions in rough glass beads
<p>The present work investigates the effect of both surface roughness and particle morphology on the retention behaviour of granular materials. To study this, X-ray micro-computed tomography tests were performed on two types of spherical glass beads (i.e. smooth and rough) and two different sands (i.e. natural and roughened). Each sample was subjected to either drainage or soaking paths consisting in a multiphase ‘static’ flow of potassium iodine (KI) brine (wetting phase) and dry air (non-wetting phase). Tomograms were taken at different saturation states ranging from fully brine saturated to air dry conditions. </p>
Micro computed tomography images of capillary actions in smooth glass beads
<p>The present work investigates the effect of both surface roughness and particle morphology on the retention behaviour of granular materials. To study this, X-ray micro-computed tomography tests were performed on two types of spherical glass beads (i.e. smooth and rough) and two different sands (i.e. natural and roughened). Each sample was subjected to either drainage or soaking paths consisting in a multiphase ‘static’ flow of potassium iodine (KI) brine (wetting phase) and dry air (non-wetting phase). Tomograms were taken at different saturation states ranging from fully brine saturated to air dry conditions. </p>
Micro computed tomography images of capillary actions in rough sand
<p>The present work investigates the effect of both surface roughness and particle morphology on the retention behaviour of granular materials. To study this, X-ray micro-computed tomography tests were performed on two types of spherical glass beads (i.e. smooth and rough) and two different sands (i.e. natural and roughened). Each sample was subjected to either drainage or soaking paths consisting in a multiphase ‘static’ flow of potassium iodine (KI) brine (wetting phase) and dry air (non-wetting phase). Tomograms were taken at different saturation states ranging from fully brine saturated to air dry conditions. </p>
Contrast-enhanced Computed Tomography and Acute Kidney Injury
ClinicalTrials.gov study NCT07091656. IPD Sharing: NO. Countries: 1. Publications: 1.
Effectiveness Study of Single Photon Emission Computed Tomography (SPECT) Versus Positron Emission Tomography (PET) Myocardial Perfusion Imaging
ClinicalTrials.gov study NCT00976053. IPD Sharing: Not stated. Countries: 1. Publications: 1.
IV Contrast-Enhanced Cone Beam Computed Tomography (CBCT) in Radiotherapy
ClinicalTrials.gov study NCT04199754. IPD Sharing: NO. Countries: 1. Publications: 7.
Ultralow Dose Computed Tomography in High-risk Drug-resistant Tuberculosis Contacts
ClinicalTrials.gov study NCT02454738. IPD Sharing: YES. Countries: 1. Publications: 1.
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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
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.