17 Result(s)
within
Philipp Berg
English
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Article
Open AccessImage-based hemodynamic simulations for intracranial aneurysms: the impact of complex vasculature
Hemodynamics play an important role in the assessment of intracranial aneurysm (IA) development and rupture risk. The purpose of this study was to examine the impact of complex vasculatures onto the intra-vess...
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Article
Open AccessMultimodal exploration of the intracranial aneurysm wall
Intracranial aneurysms (IAs) are pathological changes of the intracranial vessel wall, although clinical image data can only show the vessel lumen. Histology can provide wall information but is typically restr...
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Article
Open AccessIs Accurate Lumen Segmentation More Important than Outlet Boundary Condition in Image-Based Blood Flow Simulations for Intracranial Aneurysms?
Image-based blood flow simulations are increasingly used to investigate the hemodynamics in intracranial aneurysms (IAs). However, a strong variability in segmentation approaches as well as the absence of indi...
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Article
Open AccessLong-term outcome of patients with vaccine-induced immune thrombotic thrombocytopenia and cerebral venous sinus thrombosis
We present the long-term outcomes of 44 patients who developed cerebral venous sinus thrombosis after vaccination with the adenoviral vector ChAdOx1 nCoV-19 COVID-19 vaccine. Assessment of the Extended Glasgow...
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Article
Open AccessVirtual embolization for treatment support of intracranial AVMs using an interactive desktop and VR application
The treatment of intracranial arteriovenous malformations (AVM) is challenging due to their complex anatomy. For this vessel pathology, arteries are directly linked to veins without a capillary bed in between....
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Open AccessLuminal enhancement in intracranial aneurysms: fact or feature?—A quantitative multimodal flow analysis
Intracranial aneurysm (IA) wall enhancement on post-contrast vessel wall magnetic resonance imaging (VW-MRI) is assumed to be a biomarker for vessel wall inflammation and aneurysm instability. However, the exa...
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Article
Open AccessVICTORIA: VIrtual neck Curve and True Ostium Reconstruction of Intracranial Aneurysms
For the status evaluation of intracranial aneurysms (IAs), morphological and hemodynamic parameters can provide valuable information. For their extraction, a separation of the aneurysm sac from its parent vess...
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Article
Open AccessComplex wall modeling for hemodynamic simulations of intracranial aneurysms based on histologic images
For the evaluation and rupture risk assessment of intracranial aneurysms, clinical, morphological and hemodynamic parameters are analyzed. The reliability of intracranial hemodynamic simulations strongly depen...
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Article
Open AccessMultimodal validation of focal enhancement in intracranial aneurysms as a surrogate marker for aneurysm instability
Circumferential enhancement on MR vessel wall imaging has been proposed as a biomarker of a higher risk of rupture in intracranial aneurysms. Focal enhancement is frequently encountered in unruptured aneurysms...
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Article
Flow-splitting-based computation of outlet boundary conditions for improved cerebrovascular simulation in multiple intracranial aneurysms
Image-based hemodynamic simulations have great potential for precise blood flow predictions in intracranial aneurysms. Due to model assumptions and simplifications with respect to boundary conditions, clinical...
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Article
Multiple Aneurysms AnaTomy CHallenge 2018 (MATCH)—phase II: rupture risk assessment
Assessing the rupture probability of intracranial aneurysms (IAs) remains challenging. Therefore, hemodynamic simulations are increasingly applied toward supporting physicians during treatment planning. Howeve...
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Article
Open AccessEvaluation of flow changes after telescopic stenting of a giant fusiform aneurysm of the vertebrobasilar junction
The use of flow-diverters for non-saccular cerebral posterior circulation aneurysms requires complex deployment techniques and is associated with high mortality and morbidity. Therefore, further studies are re...
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Open AccessMultiple Aneurysms AnaTomy CHallenge 2018 (MATCH): uncertainty quantification of geometric rupture risk parameters
Geometric parameters have been proposed for prediction of cerebral aneurysm rupture risk. Predicting the rupture risk for incidentally detected unruptured aneurysms could help clinicians in their treatment dec...
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Article
Open AccessReal-World Variability in the Prediction of Intracranial Aneurysm Wall Shear Stress: The 2015 International Aneurysm CFD Challenge
Image-based computational fluid dynamics (CFD) is widely used to predict intracranial aneurysm wall shear stress (WSS), particularly with the goal of improving rupture risk assessment. Nevertheless, concern ha...
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Multiple Aneurysms AnaTomy CHallenge 2018 (MATCH): Phase I: Segmentation
Advanced morphology analysis and image-based hemodynamic simulations are increasingly used to assess the rupture risk of intracranial aneurysms (IAs). However, the accuracy of those results strongly depends on...
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Article
Semiautomatic neck curve reconstruction for intracranial aneurysm rupture risk assessment based on morphological parameters
Morphological parameters of intracranial aneurysms (IAs) are well established for rupture risk assessment. However, a manual measurement is error-prone, not reproducible and cumbersome. For an automatic extrac...
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Article
Multiple intracranial aneurysms: a direct hemodynamic comparison between ruptured and unruptured vessel malformations
Despite numerous studies addressing the rupture risk of intracranial aneurysms that have been published, the assessment thereof still remains challenging. Image-based simulations enable a precise prediction of...
