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Birgitta K. Velthuis
Researcher at Utrecht University
Publications - 231
Citations - 7286
Birgitta K. Velthuis is an academic researcher from Utrecht University. The author has contributed to research in topics: Stroke & Perfusion scanning. The author has an hindex of 41, co-authored 202 publications receiving 5971 citations.
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Journal ArticleDOI
Perfusion-CT Assessment of Infarct Core and Penumbra Receiver Operating Characteristic Curve Analysis in 130 Patients Suspected of Acute Hemispheric Stroke
Max Wintermark,Adam E. Flanders,Birgitta K. Velthuis,Reto Meuli,Maarten S. van Leeuwen,Dorit Goldsher,Carissa Pineda,Joaquín Serena,Irene C. van der Schaaf,A. Waaijer,James C. Anderson,Gary M. Nesbit,Igal Gabriely,Victoria Medina,Ana Quiles,Scott Pohlman,Scott Pohlman,Marcel Quist,Pierre Schnyder,Julien Bogousslavsky,William P. Dillon,Salvador Pedraza,Salvador Pedraza +22 more
TL;DR: In a large series of 130 patients, the optimal approach to define the infarct and the penumbra is a combined approach using 2 PCT parameters: relative MTT and absolute CBV, with dedicated thresholds.
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Histopathologic composition of cerebral thrombi of acute stroke patients is correlated with stroke subtype and thrombus attenuation.
Joris M. Niesten,Irene C. van der Schaaf,Lievay van Dam,Aryan Vink,Jan Albert Vos,Wouter J. Schonewille,Peter C. de Bruin,Willem P.Th.M. Mali,Birgitta K. Velthuis +8 more
TL;DR: A correlation between the RBC-component and thrombus attenuation is found, which improves validation of throm Bus attenuation on NCCT as an imaging biomarker for stroke management.
Journal ArticleDOI
Relationship Between Lifelong Exercise Volume and Coronary Atherosclerosis in Athletes
Vincent L. Aengevaeren,Arend Mosterd,Thijs L Braber,Niek H J Prakken,Pieter A Doevendans,Diederick E. Grobbee,Paul D. Thompson,Thijs M. H. Eijsvogels,Birgitta K. Velthuis +8 more
TL;DR: In this article, higher levels of physical activity are associated with a lower risk of cardiovascular events, however, there is debate on the dose-response relationship of exercise and cardiovascul...
Journal ArticleDOI
Circle of Willis at CT Angiography: Dose Reduction and Image Quality—Reducing Tube Voltage and Increasing Tube Current Settings
A. Waaijer,Mathias Prokop,Birgitta K. Velthuis,Chris J.G. Bakker,Gerard A. P. de Kort,Maarten S. van Leeuwen +5 more
TL;DR: In head phantoms, lower tube voltage improved SNR at equal radiation doses translated into superior image quality at 90 kVp for CT angiography of the circle of Willis.
Journal ArticleDOI
Subarachnoid hemorrhage: aneurysm detection and preoperative evaluation with CT angiography.
Birgitta K. Velthuis,Gabriel J.E. Rinkel,L. M. P. Ramos,Theo D. Witkamp,J. W. Berkelbach van der Sprenkel,William P. Vandertop,M. S. van Leeuwen +6 more
TL;DR: CT angiography must be of high quality with adequate depiction of the aneurysm and the parent artery for surgery to be performed on the basis of CT angiographic findings alone.