Results 101 to 110 of about 1,230,827 (391)

Beam hardening artifact reduction using dual energy computed tomography: implications for myocardial perfusion studies [PDF]

, 2015
Background: Myocardial perfusion computed tomography (CTP) using conventional single energy (SE) imaging is influenced by the presence of beam hardening artifacts (BHA), occasionally resembling perfusion defects and commonly observed at the left ...
Capunay, Carlos, Carrascosa, Patricia, Cipriano, Silvia, Cury, Ricardo C., De Zan, Macarena, Deviggiano, Alejandro, Rodriguez Granillo, Gaston Alfredo   +6 more
core   +1 more source

Coronary angiography enhancement for visualization [PDF]

The International Journal of Cardiovascular Imaging, 2009
High quality visualization on X-ray angiograms is of great significance both for the diagnosis of vessel abnormalities and for coronary interventions. Algorithms for improving the visualization of detailed vascular structures without significantly increasing image noise are currently demanded in the market.
Yazhu Chen, Wouter Jukema, Shengxian Tu, Su Zhang, Johan H. C. Reiber, Gerhard Koning, Joan C. Tuinenburg   +6 more
openaire   +3 more sources

Sheep femoral artery occlusion is well tolerated and does not result in ischemia

Animal Models and Experimental Medicine, EarlyView.
Left femoral artery occlusion (yellow arrows) can be seen shortly after the lateral femoral circumflex artery origin, with distal arterial reconstitution. Sheep with femoral artery occlusion showed no change in pain scores nor mobility, thus making them an appropriate model for novel small diameter femoral artery graft studies. Abstract Objective Sheep
Timothy Shiraev, Ziyu Wang, Lakshay Seth, Lisa Partel, Innes K. Wise, Hugh Paterson, John O'Sullivan, Sean Lal, Anthony S. Weiss, Paul Bannon, Robert D. Hume   +10 more
wiley   +1 more source

Use of Nuclear Magnetic Resonance Imaging Angiography to Follow-Up Arterial Remodeling in an Animal Model [PDF]

, 1998
Appropriately sized arteries in small animals may be possible models for studying the remodeling process as occurs after arterial balloon injury in humans. Magnetic resonance imaging (MRI) is able to noninvasively image tissue in vivo.
Berthold Höfling, Johannes Schirmer, Losordo DW, Markus Schwaiger, Mintz GS, Serap Esin, Sigrid Nikol, Stephan Nekolla, Tanya Y. Huehns, Toussaint JF   +9 more
core   +1 more source

Coronary CT Angiography-derived Fractional Flow Reserve Testing in Patients with Stable Coronary Artery Disease: Recommendations on Interpretation and Reporting

Radiology: Cardiothoracic Imaging, 2019
Noninvasive fractional flow reserve derived from coronary CT angiography (FFRCT) is increasingly used in patients with coronary artery disease as a gatekeeper to the catheterization laboratory.
B. Nørgaard, T. Fairbairn, R. Safian, M. Rabbat, B. Ko, J. Jensen, K. Nieman, K. Chinnaiyan, N. Sand, H. Matsuo, J. Leipsic, G. Raff   +11 more
semanticscholar   +1 more source

Disease Characteristics and Treatments Associated with Outcome in Primary Angiitis of the Central Nervous System—A Multicenter Cohort Study in 163 Patients

Annals of Neurology, EarlyView.
Objective The aim was to determine patient, disease, and treatment characteristics associated with outcome in patients with primary angiitis of the central nervous system (PACNS) in a large multicenter German cohort. Methods In a retrospective, observational cohort study, we analyzed 163 adult patients who met the diagnostic criteria for PACNS.
Anna Lena Fisse, Nadine Bonberg, Carolin Beuker, Claudia Pfeuffer, Andreas Heidenreich, Christina Krüger, Milani Deb‐Chatterji, Jana Becker, Stefan T. Gerner, Clemens Küpper, Louisa Nitsch, Roxane‐Isabelle Kestner, Lars Udo Krause, Juliane Herm, Alexander Katalinic, André Karch, Ralf Gold, Heinz Wiendl, Wolf‐Rüdiger Schäbitz, Gabor C. Petzold, Waltraud Pfeilschifter, Marius Ringelstein, Thorsten R. Doeppner, Lars Kellert, Hagen B. Huttner, Markus Kraemer, Tim Magnus, Karl Georg Haeusler, Heike Minnerup, Jens Minnerup   +29 more
wiley   +1 more source

Comentário a «Será que a diferença na opacificação coronária corrigida medida por TC é preditora do fluxo coronário?»

Revista Portuguesa de Cardiologia, 2011
Objectives: A proof-of-concept study was undertaken to determine whether differences in corrected coronary opacification (CCO) within coronary lumen can identify arteries with abnormal resting coronary flow.
Pedro Matos
doaj   +1 more source

Radiomics versus Visual and Histogram-based Assessment to Identify Atheromatous Lesions at Coronary CT Angiography: An ex Vivo Study

Radiology, 2019
Background Visual and histogram-based assessments of coronary CT angiography have limited accuracy in the identification of advanced lesions. Radiomics-based machine learning (ML) could provide a more accurate tool.
Márton Kolossváry, J. Karády, Yasuka Kikuchi, A. Ivanov, C. Schlett, Michael T. Lu, B. Foldyna, B. Merkely, H. Aerts, U. Hoffmann, P. Maurovich-Horvát   +10 more
semanticscholar   +1 more source

Silent Danger: Coexistence of Late‐Onset External Iliac Artery Pseudoaneurysm and Deep Vein Thrombosis

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Pseudoaneurysm (PA) is a well‐known vascular complication following percutaneous interventions, typically occurring in the early post‐procedural period. However, delayed‐onset PA associated with deep vein thrombosis (DVT) is an uncommon presentation.
Sefa Tatar, Oznur Keskin, Abdullah Enes Atas, Abdullah Icli   +3 more
wiley   +1 more source

Assessment of Coronary Artery Stenosis with 16 Slices Multidetector CT

Siriraj Medical Journal, 2008
Objective: To investigate the sensitivity, specificity, positive predictive value, negative predictive value and accuracy of noninvasive coronary computer tomography (CT) for assessment of coronary arteries.
Maligar Kaveevorayan, Thanongchai Siriapisith, Damras Tresukosol, Jitladda Wasinrat, Siriluck Suriyabantleng   +4 more
doaj