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ShareScore release 0.9.0
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124 results for “cmr”
Cine and real-time free-breathing CMR at rest and under exercise stress of healthy volunteers
<p>The dataset consists of cine and real-time images from 15 healthy volunteers (7 males; 8 females). All images were acquired in supine position using a 32-channel cardiac surface receiver coil at 3 T (Skyra, Siemens Healthineers, Germany).</p> <p>Conventional imaging at rest included a balanced steady-state free precession (bSSFP) ECG-gated cine sequence to create a short-axis stack covering the entire heart including both ventricles and atria. Real-time CMR data acquisition was performed during free-breathing and without ECG-synchronization at rest and under two different levels of exercise stress.</p> <p>The dataset includes automatically created contours (comDL) using Medis (version 4.0.56.4, QMass® 8.1, Medical Imaging Systems, Leiden, Netherlands) for all images, as well as manually corrected (mc) contours based on the comDL contours for all cine and real-time measurements at rest and under exercise stress for end-diastolic (ED) and end-systolic phases (ES).</p> <p>The dataset also includes segmentation masks in NIfTI format for cine and real-time CMR at rest and under exercise stress created with nnU-Net (DOI:10.1038/s41592-020-01008-z) with freely available weights based trained on the dataset of the cardiac segmentation challenge "Automated Cardiac Segmentation Challenge" (ACDC) (DOI:10.1109/TMI.2018.2837502).</p> <p>To minimize the influence of respiratory motion on clinical measures, images in the ED and ES phase of the cardiac cycle during end-expiration were manually selected for each slice. The dataset includes indices for these images for real-time CMR measurements at rest and under exercise stress. For intra-observer variability, manually corrected contours for the derivation of the clinical measures were created three to six months after the initial segmentation. For inter-observer variability, manually corrected contours for the derivation of the clinical parameters were created for the first five volunteers by a second reader with experience in cardiac segmentation. Single images in the ED and ES phase during end-expiration were once again chosen from each slice.</p> <p>Image data is provided in a file format used by the BART toolbox. <br>DOI:10.5281/zenodo.7110562</p>
Data S2. CMR data from: Measuring the fitness advantage conferred by autotomy in the wild
<p>Data S2. CMR data. The composition is summarized in tables S2, S3, and S10.</p> <p>Autotomy, the self-amputation of body parts, serves as an anti-predator defense in many taxonomic groups of animals. However, its adaptive value has seldom been quantified. Here, we propose a novel modeling approach for measuring the fitness advantage conferred by the capability for autotomy in the wild. Using a predator-prey system where a land snail autotomizes and regenerates its foot specifically in response to snake bites, we conducted a laboratory behavioral experiment and a 3-year multi-event capture–mark–recapture (CMR) study. Combining these empirical data, we developed a hierarchical model and estimated the basic life history parameters of the snail. Using samples from the posterior distribution, we constructed the snail's life table as well as that of a snail variant incapable of foot autotomy. As a result of our analyses, we estimated the monthly encounter rate with snake predators at 3.3% (95% CI: 1.6–4.9%), the contribution of snake predation to total mortality until maturity at 43.3% (15.0–95.3%), and the fitness advantage conferred by foot autotomy at 6.5% (2.7–11.5%). This study demonstrated the utility of the multi-method hierarchical modeling approach for the quantitative understanding of the ecological and evolutionary processes of anti-predator defenses in the wild.</p>
Cardiovascular MRI (CMR) 3D Cine, 4D Flow and Exercise Stress 4D flow datasets
<p>MRI Datasets for "<strong>Motion-robust free-running volumetric cardiovascular MRI" </strong>(<a href="https://doi.org/10.1002/mrm.30123">https://doi.org/10.1002/mrm.30123</a>)</p> <p><strong>Reconstruction Code Repository</strong>: <a href="https://github.com/OSU-MR/motion-robust-CMR">https://github.com/OSU-MR/motion-robust-CMR</a><br><br><strong>Cite as</strong>: Arshad SM, Potter LC, Chen C, et al. Motion-robust free-running volumetric cardiovascular MRI. Magn Reson Med. 2024; 92(3): 1248-1262. doi: 10.1002/mrm.30123<br> </p> <p>Contains: </p> <ol> <li>3D cine Cartesian bSSFP Acquisition (Undersampled data sorted into 20 cardiac bins)</li> <li>4D flow Cartesian Acquisition (Undersampled data sorted into 20 cardiac bins)</li> <li>Stress 4D flow Cartesian Acquisition (Undersampled data sorted into 20 cardiac bins)</li> </ol> <p><br><strong>Prepared by</strong>:</p> <p><strong>Syed Murtaza Arshad</strong> (<a href="arshad.32@osu.edu">arshad.32@osu.edu</a>)</p> <p>(<a href="https://github.com/syedmurtazaarshad">https://github.com/syedmurtazaarshad</a>)</p> <p> </p>
CMR in Myocardial Infarction with Nonobstructive Coronary Arteries
ClinicalTrials.gov study NCT06502899. IPD Sharing: UNDECIDED. Countries: 1. Publications: 3.
Microvascular Dysfunction in Nonischemic Cardiomyopathy: Insights From CMR Assessment of Coronary Flow Reserve
ClinicalTrials.gov study NCT03249272. IPD Sharing: UNDECIDED. Countries: 1. Publications: 5.
CMR Rate of Newly Diagnosed CML-CP Patients Treated With Nilotinib
ClinicalTrials.gov study NCT01227577. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Use of "iSuite" During CMR-guided Electrophysiological Procedures
ClinicalTrials.gov study NCT04727645. IPD Sharing: NO. Countries: 1. Publications: 4.
Stress CMR Perfusion Imaging in the United States (SPINS) Study
ClinicalTrials.gov study NCT03192891. IPD Sharing: UNDECIDED. Countries: 1. Publications: 9.
Data S2. CMR data from: Measuring the fitness advantage conferred by autotomy in the wild
Open the record for dataset details and reuse information.
LGE CMR SAX Phantom Images and Segmentation Masks
<h2>Synthetic imaging data used for analysis of Radiomic feature comparability</h2> <p>Phantom (synthetic) images of a single short-axis cardiovascular MRI slice of the heart (showing only the left ventricular myocardium and bloodpool), and corresponding segmentation masks in nifti format for whole myocardium and 17-segment AHA model. </p> <p>The phantom exists at a range of sizes (myocardial diameter between 28 and 99mm) and a range of resolutions (between 0.6 and 2.2mm isotropic voxel-size), as well as at resolutions corresponding to voxel-densities between 28 and 76 voxels per myocardial diameter.</p> <p>LGE patterns have been added to the healthy myocardium: global mesocardial LGE, global subendocardial LGE, global subepicardial LGE, inferolateral transmural LGE, and a patchy pattern. In each case, extent of LGE is 30% of the entire myocardium.</p> <p> </p> <p>Corresponding code can be found at: https://github.com/annplaube/mykkeLGEradiomics</p> <p> </p> <p>Naming conventions:</p> <p>Phantom: phantom_{LGE_pattern}_d{size}_{resampling_mode}.nii</p> <p>Label: label_d{size}_{resampling_mode}.nii</p> <p>AHA Label: label_aha_d{size}_{resampling_mode}.nii</p>
CMR in the Assessment of Patient With ACS in the Emergency Room
ClinicalTrials.gov study NCT00564382. IPD Sharing: Not stated. Countries: 1. Publications: 7.
MyoStrain CMR for the Detection of Cardiotoxicity
ClinicalTrials.gov study NCT03543228. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Technical Development of Cardiovascular Magnetic Resonance Imaging (CMR) Using a Low Specific Absorption Rate (SAR) Scanner System
ClinicalTrials.gov study NCT03331380. IPD Sharing: Not stated. Countries: 1. Publications: 4.
CMR in Type 2 Diabetes Mellitus Patients
ClinicalTrials.gov study NCT02684331. IPD Sharing: NO. Countries: 1. Publications: 5.
Technical and Translational Development of Cardiovascular Magnetic Resonance (CMR) Imaging
ClinicalTrials.gov study NCT03581318. IPD Sharing: UNDECIDED. Countries: 1. Publications: 2.
Dobutamine vs Adenosine CMR Study
ClinicalTrials.gov study NCT03661827. IPD Sharing: NO. Countries: 1. Publications: 11.
Prognotic Role of CMR in Takotsubo Syndrome
ClinicalTrials.gov study NCT06277297. IPD Sharing: NO. Countries: 1. Publications: 1.
Use of Stress-CMR Using Regadenoson and GE-267 in Adult Patients with Known or Suspected Coronary Artery Disease
ClinicalTrials.gov study NCT06246188. IPD Sharing: UNDECIDED. Countries: 1. Publications: 10.
Doxorubicin-associated Cardiac Remodeling Followed by CMR in Breast Cancer Patients
ClinicalTrials.gov study NCT03000036. IPD Sharing: NO. Countries: 1. Publications: 26.
Stress CMR in Patients With Coronary Chronic Total Occlusions
ClinicalTrials.gov study NCT03152825. IPD Sharing: Not stated. Countries: 1. Publications: 24.
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