Henk A. Marquering

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Analysis of CT datasets is commonly time consuming because of the required manual interaction. We present a novel and fast automatic initialization algorithm to detect the carotid arteries providing a fully automated approach of the segmentation and centerline detection. First, the volume of interest (VOI) is estimated using a shoulder landmark. The carotid(More)
BACKGROUND AND PURPOSE Thrombus characterization is increasingly considered important in predicting treatment success for patients with acute ischemic stroke. The lack of intensity contrast between thrombus and surrounding tissue in CT images makes manual delineation a difficult and time consuming task. Our aim was to develop an automated method for(More)
BACKGROUND Pontocerebellar hypoplasia (PCH) represents a group of neurodegenerative disorders with prenatal onset. Eight subtypes have been described thus far (PCH1-8) based on clinical and genetic features. Common characteristics include hypoplasia and atrophy of the cerebellum, variable pontine atrophy, and severe mental and motor impairments. PCH1 is(More)
INTRODUCTION Intracranial carotid artery atherosclerotic disease is an independent predictor for recurrent stroke. However, its quantitative assessment is not routinely performed in clinical practice. In this diagnostic study, we present and evaluate a novel semi-automatic application to quantitatively measure intracranial internal carotid artery (ICA)(More)
PURPOSE To report on the first clinical experience with perfusion angiography (PA) of the foot in patients with chronic critical limb ischemia. MATERIALS AND METHODS PA is a post-processing software algorithm and no extra digital subtraction angiography (DSA) has to be performed for this analysis. The data used to test the feasibility of PA were obtained(More)
  • Emilie M. M. Santos, Albert J. Yoo, Ludo F. Beenen, Olvert A. Berkhemer, Mark D. den Blanken, Carrie Wismans +3 others
  • 2016
INTRODUCTION Thrombus density may be a predictor for acute ischemic stroke treatment success. However, only limited data on observer variability for thrombus density measurements exist. This study assesses the variability and bias of four common thrombus density measurement methods by expert and non-expert observers. METHODS For 132 consecutive patients(More)
  • Ralph R. E. G. Geuskens, Jordi Borst, Marit Lucas, A. M. Merel Boers, Olvert A. Berkhemer, Yvo B. W. E. M. Roos +7 others
  • 2015
BACKGROUND CT perfusion (CTP) is used to estimate the extent of ischemic core and penumbra in patients with acute ischemic stroke. CTP reliability, however, is limited. This study aims to identify regions misclassified as ischemic core on CTP, using infarct on follow-up noncontrast CT. We aim to assess differences in volumetric and perfusion characteristics(More)