Search Results - "Toger, Johannes"

Achieving brain clearance and preventing neurodegenerative diseases—A glymphatic perspective by Kylkilahti, Tekla Maria, Berends, Eline, Ramos, Marta, Shanbhag, Nagesh C, Töger, Johannes, Markenroth Bloch, Karin, Lundgaard, Iben

“…Age-related neurodegenerative diseases are a growing burden to society, and many are sporadic, meaning that the environment, diet and lifestyle play…”
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Fetal 3D cardiovascular cine image acquisition using radial sampling and compressed sensing by Piek, Marjolein, Ryd, Daniel, Töger, Johannes, Testud, Frederik, Hedström, Erik, Aletras, Anthony H.

“…Purpose To explore a fetal 3D cardiovascular cine acquisition using a radial image acquisition and compressed‐sensing reconstruction and compare image quality…”
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Real‐time imaging of respiratory effects on cerebrospinal fluid flow in small diameter passageways by Töger, Johannes, Andersen, Mads, Haglund, Olle, Kylkilahti, Tekla Maria, Lundgaard, Iben, Markenroth Bloch, Karin

“…Purpose Respiration‐related CSF flow through the cerebral aqueduct may be useful for elucidating physiology and pathophysiology of the glymphatic system, which…”
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Independent validation of four-dimensional flow MR velocities and vortex ring volume using particle imaging velocimetry and planar laser-Induced fluorescence by Töger, Johannes, Bidhult, Sebastian, Revstedt, Johan, Carlsson, Marcus, Arheden, Håkan, Heiberg, Einar

“…Purpose This study aimed to: (i) present and characterize a phantom setup for validation of four‐dimensional (4D) flow using particle imaging velocimetry (PIV)…”
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On estimating intraventricular hemodynamic forces from endocardial dynamics: A comparative study with 4D flow MRI by Pedrizzetti, Gianni, Arvidsson, Per M., Töger, Johannes, Borgquist, Rasmus, Domenichini, Federico, Arheden, Håkan, Heiberg, Einar

“…Intraventricular pressure gradients or hemodynamic forces, which are their global measure integrated over the left ventricular volume, have a fundamental…”
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Left and right ventricular hemodynamic forces in healthy volunteers and elite athletes assessed with 4D flow magnetic resonance imaging by Arvidsson, Per M, Töger, Johannes, Carlsson, Marcus, Steding-Ehrenborg, Katarina, Pedrizzetti, Gianni, Heiberg, Einar, Arheden, Håkan

“…Intracardiac blood flow is driven by hemodynamic forces that are exchanged between the blood and myocardium. Previous studies have been limited to 2D…”
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Computational Fluid Dynamics Support for Fontan Planning in Minutes, Not Hours: The Next Step in Clinical Pre-Interventional Simulations by Frieberg, Petter, Aristokleous, Nicolas, Sjöberg, Pia, Töger, Johannes, Liuba, Petru, Carlsson, Marcus

“…Computational fluid dynamics (CFD) modeling may aid in planning of invasive interventions in Fontan patients. Clinical application of current CFD techniques is…”
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Accurate quantification of blood flow wall shear stress using simulation-based imaging: a synthetic, comparative study by Naudet, Charles J., Töger, Johannes, Zahr, Matthew J.

“…Simulation-based imaging (SBI) is a blood flow imaging technique that optimally fits a computational fluid dynamics (CFD) simulation to low-resolution, noisy…”
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Test–retest repeatability of human speech biomarkers from static and real-time dynamic magnetic resonance imaging by Töger, Johannes, Sorensen, Tanner, Somandepalli, Krishna, Toutios, Asterios, Lingala, Sajan Goud, Narayanan, Shrikanth, Nayak, Krishna

“…Static anatomical and real-time dynamic magnetic resonance imaging (RT-MRI) of the upper airway is a valuable method for studying speech production in research…”
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Investigation of cerebrospinal fluid flow in the cerebral aqueduct using high-resolution phase contrast measurements at 7T MRI by Markenroth Bloch, Karin, Töger, Johannes, Ståhlberg, Freddy

“…Background The cerebral aqueduct is a central conduit for cerebrospinal fluid (CSF), and non-invasive quantification of CSF flow in the aqueduct may be an…”
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Left ventricular fluid kinetic energy time curves in heart failure from cardiovascular magnetic resonance 4D flow data by Kanski, Mikael, Arvidsson, Per M, Töger, Johannes, Borgquist, Rasmus, Heiberg, Einar, Carlsson, Marcus, Arheden, Håkan

“…Measurement of intracardiac kinetic energy (KE) provides new insights into cardiac hemodynamics and may improve assessment and understanding of heart failure…”
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Doppler ultrasound cardiac gating of intracranial flow at 7T by Markenroth Bloch, Karin, Kording, Fabian, Töger, Johannes

“…Ultra-high field magnetic resonance imaging (MR) may be used to improve intracranial blood flow measurements. However, standard cardiac synchronization methods…”
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Independent validation of metric optimized gating for fetal cardiovascular phase‐contrast flow imaging by Bidhult, Sebastian, Töger, Johannes, Heiberg, Einar, Carlsson, Marcus, Arheden, Håkan, Aletras, Anthony H., Hedström, Erik

“…Purpose To validate metric optimized gating phase‐contrast MR (MOG PC‐MR) flow measurements for a range of fetal flow velocities in phantom experiments. 2) To…”
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Multi-Modal in Vitro Experiments Mimicking the Flow Through a Mitral Heart Valve Phantom by Christierson, Lea, Frieberg, Petter, Lala, Tania, Töger, Johannes, Liuba, Petru, Revstedt, Johan, Isaksson, Hanna, Hakacova, Nina

“…Fluid-structure interaction (FSI) models are more commonly applied in medical research as computational power is increasing. However, understanding the…”
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Quantification of left and right atrial kinetic energy using four-dimensional intracardiac magnetic resonance imaging flow measurements by Arvidsson, Per M, Töger, Johannes, Heiberg, Einar, Carlsson, Marcus, Arheden, Håkan

“…Kinetic energy (KE) of atrial blood has been postulated as a possible contributor to ventricular filling. Therefore, we aimed to quantify the left (LA) and…”
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Accuracy of four-dimensional phase-contrast velocity mapping for blood flow visualizations: a phantom study by Nilsson, Anders, Bloch, Karin Markenroth, Töger, Johannes, Heiberg, Einar, Ståhlberg, Freddy

“…Time-resolved three-dimensional, three-directional phase-contrast magnetic resonance velocity mapping (4D PC-MRI) is a powerful technique to depict dynamic…”
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Quantification of left and right atrial kinetic energy using four-dimensional intracardiac magnetic resonance imaging flow measurements by Arvidsson, Per, Toger, Johannes, Heiberg, Einar, Carlsson, Marcus, Arheden, Hakan

“…Doc number: P218…”
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Blood flow imaging by optimal matching of computational fluid dynamics to 4D‐flow data by Töger, Johannes, Zahr, Matthew J., Aristokleous, Nicolas, Markenroth Bloch, Karin, Carlsson, Marcus, Persson, Per‐Olof

“…Purpose Three‐dimensional, time‐resolved blood flow measurement (4D‐flow) is a powerful research and clinical tool, but improved resolution and scan times are…”
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Vortex formation ratio in heart failure compared to healthy volunteers at rest and during exercise by Kanski, Mikael, Toger, Johannes, Steding-Ehrenborg, Katarina, Carlsson, Marcus, Heiberg, Einar, Arheden, Hakan

“…Doc number: O65…”
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Analysis of speech production real-time MRI by Ramanarayanan, Vikram, Tilsen, Sam, Proctor, Michael, Töger, Johannes, Goldstein, Louis, Nayak, Krishna S., Narayanan, Shrikanth

“…•Presents an in-depth analysis of the state of the art in analysis of real-time MRI data of speech production.•Describes with examples a unified, graphical…”
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