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141 results for “Computed Tomography (CT)”
Trajectory with Overlapping Projections x-ray Computed Tomography (TOP-CT) dataset of 23 mandarins moving over a circular trajectory
<p><strong>Summary</strong></p><p>This dataset is a collection of X-ray projection images of 23 mandarins moving over a circular trajectory in such a way that the projections of multiple adjacent mandarins overlap. The dataset was acquired to test out Trajectory with Overlapping Projections x-ray Computed Tomography (TOP-CT), about which a paper is published in IEEE Transactions on Computational Imaging [Schut 2022].</p><p> </p><p><strong>Description</strong></p><p><i>Sample information</i></p><p>The samples are 23 mandarins. The first 10 are of the Nadorcott cultivar, and the remaining 13 are of the Clemenrubi cultivar. The diameter of the mandarins ranges between 50 and 58 mm. Per sample metadata can be found in the mandarin_metadata.csv file.</p><p><i>Scanner information</i></p><p>The dataset is acquired in the FleX-ray Laboratory, developed by TESCAN-XRE, located at CWI in Amsterdam. The CT scanner consists consists of a cone-beam microfocus polychromatic X-ray point source, and a 1944x1536 pixel, 14-bit, flat detector panel (Dexela1512NDT). Full details can be found in [Coban 2020].</p><p><i>Scanning geometry</i></p><p>The mandarins were moved according to a custom scanning protocol, with the intention to simulate a conveyor belt setup. A wooden disk was attached on top of the rotation stage and six evenly spaced object positions were marked on the disk at a fixed distance from the center of rotation. Pieces of cardboard tube were used as sample holders to make sure the mandarins wouldn't roll as the disk would rotate and to raise them from the disk without attenuating too much of the X-ray signal. The rotation stage was positioned in such a way that over a full rotation of the disk, each mandarin would be completely in view of the detector for more than 180 degrees of the rotation, while there would also be a position at which it would be completely out of view. An image illustrating the exact dimensions is included in mandarin_carousel_dimensions.png.</p><p>The scan was performed in phases. Every phase 400 projection images were acquired, while rotating the disk for 60 degrees. This would rotate one of the positions out of view of the scanning setup. Before the first 6 phases a mandarin was added on the position that was out of view of the setup. For the phases after that the position that would be out of view would contain a mandarin that had rotated the full circle so that mandarin was replaced with a new mandarin. At the last 6 phases there would be no new mandarins left to add so the mandarin that was out of view of the setup would only be removed. The projection images acquired from each phase were concatenated resulting in a dataset of 11200 projections. At most 5 mandarins were in view at a given time.</p><p>Note: Due to a small oversight while scanning, the 19th mandarin is not included on projections 9200-9205. This area can be masked out during reconstruction.</p><p><i>Scanning settings</i></p><p>A peak voltage of 90kV was used, the target power was set to 49.5W and the spectrum was pre-filtered using 0.1mm of copper. An exposure time of 200 ms was used for each projection. A start-stop acquisition scheme was used to minimize vibrations and to make adding and removing mandarins easier: After each projection image was acquired, the stage was rotated to a new position and the scanner was paused for 200 ms before acquiring the next projection image. Darkfield and flatfield images were acquired before and after all the mandarins were scanned using the average over 200 images. 2x2 pixel hardware binning was used and all images were cropped to a 500 pixel high region around the center, resulting in 11200 projection images of 956x500 pixels (11.1GB uncompressed). All images are stored in .tif format.</p><p><i>Reconstructing volumes</i></p><p>The repository <a href="https://github.com/D1rk123/top-ct_experiments">https://github.com/D1rk123/top-ct_experiments</a> contains code for TOP-CT simulations and reconstructions. The script mandarin_carousel_experiment.py was specifically written to reconstruct volumes for each separate mandarin from this dataset.</p><p> </p><p><strong>Research group</strong><br>These datasets are produced by the Computational Imaging group at Centrum Wiskunde & Informatica (CI-CWI) in Amsterdam, The Netherlands: <a href="https://www.cwi.nl/research/groups/computational-imaging">https://www.cwi.nl/research/groups/computational-imaging</a></p><p><strong>Contact details</strong><br>dirk [dot] schut [at] cwi [dot] nl</p><p><strong>Acknowledgments</strong><br>This work was funded by the Dutch Research Council (NWO) through the UTOPIA project (ENWSS.2018.003). The authors also acknowledge TESCAN-XRE NV for their collaboration and support of the FleX-ray laboratory.</p><p><strong>References</strong></p><p>[Schut 2022] D. E. Schut, K. J. Batenburg, R. van Liere, and T. van Leeuwen, "TOP-CT: Trajectory with Overlapping Projections X-ray Computed Tomography", 2022, IEEE Transactions on Computational Imaging<br>[Coban 2020] S. B. Coban, F. Lucka, W. J. Palenstijn, D. Van Loo, and K. J. Batenburg, "Explorative imaging and its implementation at the FleX-ray Laboratory," J. Imaging, vol. 6, no. 18, 2020, doi: 10.3390/jimaging6040018.</p><p>If you use (parts of) this data in a publication, please consider citing the first article.</p>
Computed tomography (CT) was used to study the interaction of NMs with the plant cell tissue in vivo using Zeiss Xradia 510 system on Arabidopsis thaliana leaf. T
<p>This work was supported by the National Research Facility for Lab X-ray CT (NXCT) at the µ-VIS X-ray Imaging Centre, University of Southampton, through EPSRC grant EP/T02593X.</p>
Diagnosis of Acute Appendicitis: Low-dose Computed Tomography (CT) Versus Standard-dose CT
ClinicalTrials.gov study NCT00913380. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Validation of a Computed Tomography (CT) Based Fractional Flow Reserve (FFR) Software Using the 320 Detector Aquilion ONE CT Scanner.
ClinicalTrials.gov study NCT03149042. IPD Sharing: NO. Countries: 1. Publications: 6.
Point-of-Care Computed Tomography (CT) Chronic Rhinosinusitis Study
ClinicalTrials.gov study NCT00871286. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Clinical Outcomes of Deep Brain Stimulator (DBS) Electrodes Placed Using Intraoperative Computed Tomography (CT) and Frameless Stereotaxis
ClinicalTrials.gov study NCT01703598. IPD Sharing: Not stated. Countries: 1. Publications: 1.
The Effect of Atorvastatin and Pioglitazone on Carotid Atherosclerosis With the Use of Positron Emission Tomography-computed Tomography (PET-CT)
ClinicalTrials.gov study NCT01341730. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Petermann Fjord Sediment Core Computed Tomography (CT) Scans (Cruise OD1507)
<p>Computed tomography (CT) scans of sediment cores collected from Petermann Fjord during the PETERMANN15 expedition of the Swedish Icebreaker Oden, OD1507. Included cores, 03TC, 03PC, 04GC, 06PC, 08GC, 10PC, 10TC, 40PC, 40TC, and 41GC. Data include 2 mm thick coronal slices in DICOM format and SedCT products, including images and CT numbers.</p>
Time-lapse helical X-ray computed tomography (CT) data of tensile fatigue damage in GFRP
<p>The X-ray CT data here is published with the paper - </p> <p>Wang, Y.; Mikkelsen, L.P.; Pyka, G.; Withers, P.J. Time-Lapse Helical X-ray Computed Tomography (CT) Study of Tensile Fatigue Damage Formation in Composites for Wind Turbine Blades. <em>Materials</em> <strong>2018</strong>, <em>11</em>, 2340.</p> <p>https://doi.org/10.3390/ma11112340</p> <p>More information about the data and the material can be found in the paper above.</p> <p> </p> <p>If using the data here, please cite the above paper.<em> </em></p> <p>Contact details for author: Ying Wang, ying.wang-4@manchester.ac.uk</p>
Iodine Content for Diagnostic AccuRacy and Patient Comfort For Individuals Undergoing Cardiac Computed Tomography (CT) Scanning
ClinicalTrials.gov study NCT01052441. IPD Sharing: Not stated. Countries: 2. Publications: 1.
320-slice Coronary Computed Tomography (CT) Angiography
ClinicalTrials.gov study NCT00721851. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Canadian Computed Tomography (CT) Head Rule Study
ClinicalTrials.gov study NCT00993252. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Clinical Values of Dose Reduction Techniques in Computed Tomography (CT) Coronary Artery Imaging With 64-row Multi-Slice Helical CT
ClinicalTrials.gov study NCT01060657. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Intestinal Wall Remodeling (Infliximab Therapy) in Crohn's Disease Patients Undergoing Serial Computed Tomography (CT) Enterography
ClinicalTrials.gov study NCT00819663. IPD Sharing: Not stated. Countries: 1. Publications: 1.
The Dutch Acute Stroke Trial (DUST): Prediction of Outcome With Computed Tomography (CT) - Perfusion and CT-angiography
ClinicalTrials.gov study NCT00880113. IPD Sharing: Not stated. Countries: 1. Publications: 7.
Coronary Computed Tomography for Systematic Triage of Acute Chest Pain Patients to Treatment (CT-STAT)
ClinicalTrials.gov study NCT00468325. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effects of Bronchodilation on Computed Tomography (CT) Parameters Reflecting Airways Remodelling, and Pulmonary Emphysema Extent.
ClinicalTrials.gov study NCT01142531. IPD Sharing: Not stated. Countries: 1. Publications: 9.
Evaluation of Subclinical COronary Atherosclerosis for Risk Stratification Using Coronary Computed Tomography (CT) Angiography
ClinicalTrials.gov study NCT01416532. IPD Sharing: Not stated. Countries: 1. Publications: 1.
FDG Positron Emission Tomography and Computed Tomography (PET-CT) in Metastatic Prostate Cancer
ClinicalTrials.gov study NCT00282906. IPD Sharing: Not stated. Countries: 1. Publications: 1.
AI Assisted Reader Evaluation in Acute Computed Tomography (CT) Head Interpretation
ClinicalTrials.gov study NCT06018545. IPD Sharing: Not stated. Countries: 1. Publications: 22.
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