Searched for: subject%3A%22blood%255C%2Bflow%22
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Renaud, G.G.J. (author), Salles, Sébastien (author)
In this chapter, we first review the reasons why conventional ultrasonography fails to image the interior of bones. Next we show our recent work on imaging a cortical bone layer with ultrasound. Revealing the shape of the cortex of a bone, in particular its thickness, is of interest for evaluating bone strength. In addition we describe how...
journal article 2022
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Wahyulaksana, G. (author), Wei, Luxi (author), Schoormans, Jasper (author), Voorneveld, J.D. (author), van der Steen, A.F.W. (author), de Jong, N. (author), Vos, H.J. (author)
Suppressing tissue clutter is an essential step in blood flow estimation and visualization, even when using ultrasound contrast agents. Blind source separation (BSS)-based clutter filter for high frame rate ultrasound imaging has been reported to perform better in tissue clutter suppression than the conventional frequency-based wall filter...
journal article 2022
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Voorneveld, J.D. (author), Keijzer, L.B.H. (author), Strachinaru, Mihai (author), Bowen, Daniel J. (author), Mutluer, Ferit O. (author), van der Steen, A.F.W. (author), Ten Cate, Folkert (author), de Jong, N. (author), Vos, H.J. (author), Van den Bosch, Annemien E. (author), Bosch, Johan G. (author)
High-frame-rate (HFR) echo-particle image velocimetry (echoPIV) is a promising tool for measuring intracardiac blood flow dynamics. In this study, we investigate the optimal ultrasound contrast agent (UCA: SonoVue) infusion rate and acoustic output to use for HFR echoPIV (PRF = 4900 Hz) in the left ventricle (LV) of patients. Three infusion...
journal article 2021
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Westenberg, Jos J.M. (author), van Assen, Hans C. (author), van den Boogaard, Pieter J. (author), Goeman, Jelle J. (author), Saaid, Hicham (author), Voorneveld, J.D. (author), Bosch, Johan (author), Kenjeres, S. (author), Claessens, Tom (author)
Purpose: To assess errors associated with EPI-accelerated intracardiac 4D flow MRI (4DEPI) with EPI factor 5, compared with non-EPI gradient echo (4DGRE). Methods: Three 3T MRI experiments were performed comparing 4DEPI to 4DGRE: steady flow through straight tubes, pulsatile flow in a left-ventricle phantom, and intracardiac flow in 10...
journal article 2021
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Verzijl, Matthijs (author)
While millions of people world wide suffer from arterial diseases, such as peripheral arterial disease, there are a limited number of methods that can be used to diagnose and track these diseases which are also easy, quick and non-invasive. <br/><br/>This work focuses on what is needed to improve diagnosing and tracking of peripheral arterial...
master thesis 2020
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Hamel, David (author)
In this thesis, the behaviour and application of a one-dimensional model describing blood flow through compliant vessels is investigated. The one-dimensional model is derived using the physical laws of conservation of momentum and conservation of mass and uses a Finite Volume Method in combination with a high resolution flux difference splitting...
bachelor thesis 2020
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Kumar, Karishma (author)
Detailed imaging of blood flow may improve the understanding of brain functions. The state-of-the-art non-invasive flow imaging of the brain is limited to a one-dimensional Doppler setting. We propose a method to estimate the two-dimensional flow vector in the fine vascular network of the brain by using a speckle tracking technique. The...
master thesis 2020
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Milidonis, Xenios (author), Nazir, Muhummad Sohaib (author), Schneider, Torben (author), Capstick, Myles (author), Drost, S. (author), Kok, Gertjan (author), Pelevic, Nikola (author), Poelma, C. (author), Schaeffter, Tobias (author), Chiribiri, Amedeo (author)
Purpose: Cardiovascular magnetic resonance first-pass perfusion for the pixel-wise detection of coronary artery disease is rapidly becoming the clinical standard, yet no widely available method exists for its assessment and validation. This study introduces a novel phantom capable of generating spatially dependent flow values to enable...
journal article 2020
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Bladt, Piet (author), den Dekker, A.J. (author), Clement, Patricia (author), Achten, Eric (author), Sijbers, Jan (author)
Multi-post-labeling-delay pseudo-continuous arterial spin labeling (multi-PLD PCASL) allows for absolute quantification of the cerebral blood flow (CBF) as well as the arterial transit time (ATT). Estimating these perfusion parameters from multi-PLD PCASL data is a non-linear inverse problem, which is commonly tackled by fitting the single...
journal article 2019
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Rawat, Digvijay (author)
An aneurysm refers to the local dilation or ballooning of a blood vessel and if left unchecked, almost every aneurysm continues to grow in size until it eventually ruptures. The abdominal aorta is the most common location for an aneurysm to form and an abdominal aortic aneurysm (AAA) can turn lethal in the event of rupture. Since the current...
master thesis 2017
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Rozendaal, Marco (author)
In this thesis, it is investigated how the blood flow changes in different physiological situations, using a one-dimensional model, that describes the blood flow in compliant vessels. The one-dimensional model, that describes the blood flow, is derived based on the physical laws of conservation of momentum and conservation of mass. A high...
bachelor thesis 2017
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Giordano, M. (author), Poot, D.H.J. (author), Coenen, Adriaan (author), van Walsum, Theo (author), Tezza, Michela (author), Nieman, Koen (author), Niessen, W.J. (author)
Purpose<br/>Myocardial blood flow (MBF) obtained by dynamic CT perfusion (CTP) has been recently introduced to assess hemodynamic significance of coronary stenosis in coronary artery disease. The diagnostic performance of dynamic CTP MBF is limited due to subjective interpretation of MBF maps and MBF variations caused by physiological,...
journal article 2017
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Wu, Y. (author), Nieuwenhoff, M.D. (author), Huygen, F.J.P.M. (author), van der Helm, F.C.T. (author), Niehof, S.P. (author), Schouten, A.C. (author)
Small nerve fibers regulate local skin blood flow in response to local thermal perturbations. Small nerve fiber function is difficult to assess with classical neurophysiological tests. In this study, a vasomotor response model in combination with a heating protocol was developed to quantitatively characterize the control mechanism of small...
journal article 2017
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Leeuwis, Anna E. (author), Hooghiemstra, Astrid M. (author), Amier, Raquel (author), Ferro, Doeschka A. (author), Franken, Leonie (author), Nijveldt, Robin (author), Kuijer, Joost P A (author), Bronzwaer, Anne Sophie G T (author), van Lieshout, Johannes J. (author), Rietberg, Marc B. (author), Veerbeek, Janne M. (author), Huijsmans, Rosalie J. (author), Backx, Frank J G (author), Teunissen, Charlotte E. (author), Bron, Esther E. (author), Barkhof, Frederik (author), Prins, Niels D. (author), Shahzad, Rahil (author), Niessen, W.J. (author), de Roos, Albert (author), van Osch, Matthias J P (author), van Rossum, Albert C. (author), Biessels, Geert J. (author), van der Flier, Wiesje M. (author)
There is evidence for a beneficial effect of aerobic exercise on cognition, but underlying mechanisms are unclear. In this study, we test the hypothesis that aerobic exercise increases cerebral blood flow (CBF) in patients with vascular cognitive impairment (VCI). This study is a multicenter single-blind randomized controlled trial among 80...
journal article 2017
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Hooghiemstra, Astrid M. (author), Bertens, Anne Suzanne (author), Leeuwis, Anna E. (author), Bron, Esther E. (author), Bots, Michiel L. (author), Brunner-La Rocca, Hans Peter (author), De Craen, Anton J M (author), van der Geest, Rob J. (author), Greving, Jacoba P. (author), Kappelle, L. Jaap (author), Niessen, W.J. (author), van Oostenbrugge, Robert J. (author), van Osch, Matthias J P (author), de Roos, Albert (author), van Rossum, Albert C. (author), Biessels, Geert Jan (author), van Buchem, Mark A. (author), Daemen, Mat J A P (author), van der Flier, Wiesje M. (author)
Background: Hemodynamic balance in the heart-brain axis is increasingly recognized as a crucial factor in maintaining functional and structural integrity of the brain and thereby cognitive functioning. Patients with heart failure (HF), carotid occlusive disease (COD), and vascular cognitive impairment (VCI) present themselves with complaints...
journal article 2017
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Nieuwenhoff, MD (author), Wu, Y. (author), Huygen, F.J.P.M. (author), Schouten, A.C. (author), van der Helm, F.C.T. (author), Niehof, SP (author)
Introduction: Small nerve fiber dysfunction is an early feature of diabetic neuropathy. There is a strong clinical need for a non-invasive method to assess small nerve fiber function. Small nerve fibers mediate axon reflex-related vasodilation and play an important role in thermoregulation. Assessing the reflex vasodilation after local heating...
journal article 2016
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Kenjeres, S. (author)
We present a short overview of some of our most recent work that combines the mathematical modeling, advanced computer simulations and state-of-the-art experimental techniques of physical transport phenomena in various bio-medical applications. In the first example, we tackle predictions of complex blood flow patterns in the patient-specific...
journal article 2016
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Ikram, M.A. (author), Van der Lugt, A. (author), Niessen, W.J. (author), Koudstaal, P.J. (author), Krestin, G.P. (author), Hofman, A. (author), Bos, D. (author), Vernooij, M.W. (author)
Imaging plays an essential role in research on neurological diseases in the elderly. The Rotterdam Scan Study was initiated as part of the ongoing Rotterdam Study with the aim to elucidate the causes of neurological disease by performing imaging of the brain in a prospective population-based setting. Initially, in 1995 and 1999, random...
journal article 2015
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Kenjeres, S. (author)
We present a short overview of some of our most recent work that combines the mathematical modeling, advanced computer simulations and state-of-the-art experimental techniques of physical transport phenomena in various bio-medical applications. In the first example, we tackle predictions of complex blood flow patterns in the patient-specific...
journal article 2015
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Poelma, C. (author)
To gain a better understanding of the role of haemodynamic forces during the development of the cardiovascular system, a series of studies have been reported recently that describe flow fields in the vasculature of model systems. Such data sets, in particular those reporting networks at multiple stages, mark a transition in the focus from single...
journal article 2015
Searched for: subject%3A%22blood%255C%2Bflow%22
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