282 research outputs found
Magnetic Resonance Imaging findings in a Positron Emission Tomography-Positive thoracic aortic aneurysm
peer reviewe
Cross-Sectional Imaging to Evaluate the Risk of Rupture in Abdominal Aortic Aneurysms
Review article based on a dissertation submitted to fulfill the academic grade of doctor in medical sciences (....), entitled: Imaging the mechanisms involved in abdominal aortic aneurysms rupture; a step towards patient-specific risk assessment
Transcranial color-coded sonography in the management of patients with cervical and intracranial arterial stenosis
peer reviewedLe progrès technique en imagerie a permis le développement
de l’écho-Doppler transcrânien en mode duplex ou
triplex. A côté des autres techniques de neuro-imagerie, son
intérêt dans la pathologie vasculaire cérébrale va grandissant.
Le présent article a pour but de présenter cette technique en
détaillant ses indications actuelles chez les patients présentant
des sténoses artérielles cervicales et intra-crâniennes
Pulmonary Artery Sling Blurs the Distal Trachea on Frontal Chest Radiography
Teaching Point: The pulmonary artery sling can be suspected on frontal chest radiography, not only by ancillary findings like lobe/lung emphysema or persisting atelectasis, but also blurring of the distal trachea or carina
Predicting Disease Progression and Mortality in Aortic Stenosis: A Systematic Review of Imaging Biomarkers and Meta-Analysis
Background: Detecting among patients with aortic stenosis (AS) those who are likely to rapidly progress, yet potentially benefiting from prophylactic aortic valve replacement, is needed for improved patient care. The objective of this study was to evaluate the role of imaging biomarkers in predicting the progression to clinical symptoms and death in patients with AS.Methods: We searched the Pubmed and the International Clinical Trials Registry Platform databases for studies including patients with AS, and investigating imaging techniques, published in any language until Jan 1, 2018. Eligible sets of data include effect of imaging biomarkers relative to: (1) Overall mortality, (2) Cardiac mortality, and (3) Overall events (Symptom onset and Major Adverse Cardiovascular Events). Meta-analysis was used to examine associations between the imaging biomarkers and outcomes of AS using Random Effect models.Results: Eight studies and 1,639 patients were included after systematic review. Four studies investigated aortic valve calcification (AVC) whereas the remaining investigated biomarkers provided by cardiac magnetic resonance (CMR). Four articles investigated the presence of midwall fibrosis on late-gadolinium enhancement imaging, three reported its extent (LGE%) and two, the myocardial extracellular volume (ECV). By decreasing strength of association, there were significant associations between cardiac mortality and LGE% [Relative Risk (RR) = 1.05, 95% Confidence Interval (CI) 1.01–1.10]; overall mortality and AVC (RR = 1.19, 95%CI: 1.05–1.36); overall events and ECV (RR = 1.68, 95%CI: 1.17–2.41); cardiac mortality and midwall fibrosis (RR = 2.88, 95%CI: 1.12–7.39).Conclusion: AVC and myocardial fibrosis imaging biomarkers predict the outcomes in AS, and help understanding AS pathophysiology and setting therapeutic targets
Nanocomposite and Nanofluids: Towards a Sustainable Carbon Capture, Utilization, and Storage
Large volumes of unconventional fossil resource are untapped because of the capillary forces, which kept the oil stranded underground. Furthermore, with the increasing demand for sustainable energy and the rising attention geared towards environment protection, there is a vital need to develop materials that bridge the gap between the fossil and renewable resources effectively. An intensive attention has been given to nanomaterials, which from their native features could increase either the energy storage or improve the recovery of fossil energy. The present chapter, therefore, presents the recent advancements of nanotechnology towards the production of unconventional resources and renewable energy. The chapter focuses primarily on nanomaterials applications for both fossils and renewable energies. The chapter is not intended to be an exhaustive representation of nanomaterials, rather it aims at broadening the knowledge on functional nanomaterials for possible engineering applications
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