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Methodologies to assess blood flow in cerebral aneurysms: Current state of research and perspectives

L. Augsburger, P. Reymond, E. Fonck, Z. Kulcsar, M. Farhat, M. Ohta, N. Stergiopulos, D. A. Rüfenacht
2009 Journal of neuroradiology  
fate and treatment in cerebral aneurysms.  ...  KEYWORDS Cerebral aneurysms; Blood flow assessment; Particle image velocimetry; Computational fluid dynamics Summary With intracranial aneurysms disease bringing a weakened arterial wall segment to initiate  ...  Radaelli, PhD for their precious advices, Dr Fumio Asakura, MD, and all the technicians from the Hydraulic Machines Laboratory (lmh.epfl.ch, Lausanne, Switzerland) for their support and help in conducting  ... 
doi:10.1016/j.neurad.2009.03.001 pmid:19487029 fatcat:zctp53ntirhnvgs33sfgjmelqa

Four-dimensional MRI flow examinations in cerebral and extracerebral vessels – ready for clinical routine?

Susanne Schnell, Can Wu, Sameer A. Ansari
2016 Current Opinion in Neurology  
Recent findings-4D flow MRI has been applied in multiple studies to qualitatively and quantitatively study intracranial aneurysm blood flow for potential risk stratification and to assess treatment efficacy  ...  Illinois Abstract Purpose of review-To evaluate the feasibility of 4D flow MRI for the clinical assessment of cerebral and extracerebral vascular hemodynamics in patients with neurovascular disease.  ...  Acknowledgments Financial support and sponsorship We thank the following funding agencies for their support: American Heart Association (AHA) Predoctoral  ... 
doi:10.1097/wco.0000000000000341 pmid:27262148 pmcid:PMC4939804 fatcat:umqcxolpjrerpaqtgtisajuotu

Predictive modeling and in vivo assessment of cerebral blood flow in the management of complex cerebral aneurysms

Brian P Walcott, Clemens Reinshagen, Christopher J Stapleton, Omar Choudhri, Vitaliy Rayz, David Saloner, Michael T Lawton
2016 Journal of Cerebral Blood Flow and Metabolism  
Aneurysm treatment aims to reduce hemorrhage events, and strategies for complex aneurysms often require surgical bypass or endovascular stenting for blood flow diversion.  ...  Recent developments in computational modeling and in vivo assessment of hemodynamics for cerebral aneurysm treatment have entered into clinical practice.  ...  Authors' contributions All authors made a substantial contribution to the concept and design, acquisition of data or analysis and interpretation of data, drafted the article or revised it critically for  ... 
doi:10.1177/0271678x16641125 pmid:27009946 pmcid:PMC4908629 fatcat:4v5uoolxgjfjfntus5dxaobec4

Low Profile Visualized Intraluminal Support (LVIS) Stent in Endovascular Coil Embolization of Cerebral Aneurysms: A Review

Ujjwol KC, Gang Deng
2019 Open Journal of Radiology  
Cerebral or intracranial aneurysm is a leading cause of subarachnoid hemorrhage.  ...  It was initially treated with open surgical clipping but as rapid development of technology a less invasive endovascular coiling technique of aneurysm revolutionized the treatment.  ...  Because comparing both coiling does not physically approximate the inner blood vessel lining, blood flow to aneurysm may occur through the incomplete compac-U. KC, G.  ... 
doi:10.4236/ojrad.2019.92009 fatcat:hsj6f77brrhmfkevwuq5kehdvq

Aneulysis - A System for Aneurysm Data Analysis

Monique Meuschke, Ralph Wickenhöfer, Bernhard Preim, Kai Lawonn
2020 Eurographics Workshop on Visual Computing for Biomedicine  
We present ANEULYSIS, a system to improve risk assessment and treatment planning of cerebral aneurysms.  ...  Aneurysm growth, rupture, and treatment success depend on the interplay of vascular morphology and hemodynamics. Blood flow simulations can obtain the patient-specific hemodynamics.  ...  The authors like to thank Philipp Berg and Samuel Voß for the fruitful discussions on these and related topics.  ... 
doi:10.2312/vcbm.20201179 dblp:conf/vcbm/MeuschkeWPL20 fatcat:4uoq5vfelrgsvp5lajwli3koia

Validity of PETRA-MRA for Stent-Assisted Coil Embolization of Intracranial Aneurysms

Keisuke Sato, Akihiro Asano, Tsutomu Kobayashi, Hiroshi Aoki, Shinya Jinguji, Hiroki Seto, Hiroshi Demachi, Hitoshi Hasegawa, Yukihiko Fujii
2021 Journal of Neuroendovascular Therapy  
The PETRA-MRA images were compared with those from DSA and TOF-MRA to validate the aneurysm occlusion status and visually assess the blood flow within the stent.  ...  On the PETRA-MRA images, blood flow through the stent was well-visualized and produced an aneurysm occlusion status score comparable to DSA, especially in the three cases using the Neuroform Atlas Stent  ...  On PETRA/TOF-MRA at 9 months after treatment, the visualization score of the blood flow within the stent was rated as 1 for TOF-MRA images and 2 for PETRA-MRA images.  ... 
doi:10.5797/jnet.oa.2020-0039 fatcat:d74avp4szvfmtpwcbzjcwthxvm

Intraoperative microvascular Doppler ultrasonography in cerebral aneurysm surgery

R. Stendel
2000 Journal of Neurology, Neurosurgery and Psychiatry  
Blood flow velocities in the aneurysmal sac and in the adjacent vessels were determined by MDU before and after aneurysm clipping.  ...  Objectives-Outcome of surgical treatment of cerebral aneurysms may be severely compromised by local cerebral ischaemia or infarction resulting from the inadvertent occlusion of an adjacent vessel by the  ...  Furthermore, MDU can be used for assessing vessel patency and direction of flow following trapping bypass and blood flow redirection procedures for complex aneurysms.  ... 
doi:10.1136/jnnp.68.1.29 pmid:10601397 pmcid:PMC1760608 fatcat:p5g6nanlivg63il3ht5yibuhmm

Nicholas of Cusa (1401-64)

L F HAAS
2000 Journal of Neurology, Neurosurgery and Psychiatry  
Blood flow velocities in the aneurysmal sac and in the adjacent vessels were determined by MDU before and after aneurysm clipping.  ...  Objectives-Outcome of surgical treatment of cerebral aneurysms may be severely compromised by local cerebral ischaemia or infarction resulting from the inadvertent occlusion of an adjacent vessel by the  ...  Furthermore, MDU can be used for assessing vessel patency and direction of flow following trapping bypass and blood flow redirection procedures for complex aneurysms.  ... 
doi:10.1136/jnnp.68.1.35 pmid:10601398 pmcid:PMC1760632 fatcat:qwrokkldbzf3xdl25oas6hcpt4

Hemodynamics of Cerebral Aneurysms: Connecting Medical Imaging and Biomechanical Analysis

Vitaliy L Rayz, Aaron A Cohen-Gadol
2020 Annual Review of Biomedical Engineering  
In the last two decades, numerous studies have conducted patient-specific computations of blood flow dynamics in cerebral aneurysms and reported correlations between various hemodynamic metrics and aneurysmal  ...  disease progression or treatment outcomes.  ...  Hui Meng, David Saloner, and Susanne Schnell for permission to use their images and Dr. Kimberly Stevens and Mr. Sean Rothenberger for helping with editing the manuscript.  ... 
doi:10.1146/annurev-bioeng-092419-061429 pmid:32212833 pmcid:PMC9219593 fatcat:jrvzsszb5vcwjfxbwhctafqvoq

Revascularization for Complex Cerebral Aneurysms

Bai-Nan Xu, Zheng-Hui Sun, Chen Wu, Jin-Li Jiang, Ding-Biao Zhou, Xin-Guang Yu, Garnette R. Sutherland, Bao-Min Li
2011 Canadian Journal of Neurological Sciences  
treatment of complex cerebral aneurysms.  ...  ABSTRACT:Background and Purpose:Complex cerebral aneurysms may require indirect treatment with revascularization.  ...  Intraoperative microvascular doppler ultrasonography was used to assess blood flow in parent and branch arteries.  ... 
doi:10.1017/s031716710005407x fatcat:bxxuzacxzbhglpsjl4ulcjwy7e

The application of intraoperative near-infrared indocyanine green videoangiography and analysis of fluorescence intensity in cerebrovascular surgery

Y Kato, J Oda, A Kumar, T Watabe, S Imizu, SF Chen, D Oguri, H Sano, Y Hirose
2011 Surgical neurology international  
CONCLUSION ICG-VA allows a real-time assessment of the blood flow during procedures involving the cerebral aneurysms and AVMs.  ...  It is used for evaluating the cardiac output, the hepatic functions, and also to assess the blood flow across the vascular anastomosis.  ... 
doi:10.4103/2152-7806.78517 pmid:21541008 pmcid:PMC3075608 fatcat:zsdlpc3hurboffcts2zjjgn5oa

Indocyanine green video-angiography in neurosurgery: A glance beyond vascular applications

A. Scerrati, G.M. Della Pepa, G. Conforti, G. Sabatino, A. Puca, A. Albanese, G. Maira, E. Marchese, G. Esposito
2014 Clinical neurology and neurosurgery (Dutch-Flemish ed. Print)  
OBJECTIVE: Indocyanine green video angiography (ICG-VA) is a non invasive, easy to use and a very useful tool for various neurosurgical procedures.  ...  ABSTRACT Objective: Indocyanine green video angiography (ICG-VA) is a non invasive, easy to use and a very useful tool for various neurosurgical procedures.  ...  , cerebral blood flow.  ... 
doi:10.1016/j.clineuro.2014.06.032 pmid:25033322 fatcat:7cb6x4o2drdjvf2dyoa3437gxe

Intraoperative monitoring of cerebral blood flow by laser speckle contrast analysis

Nils Hecht, Johannes Woitzik, Jens P. Dreier, Peter Vajkoczy
2009 Neurosurgical Focus  
For intraoperative monitoring of CBF, several approaches have been pursued primarily for angiographic visualization of the cerebral vasculature or invasive assessment of CBF.  ...  For this purpose, invasive thermal diffusion flowmetry can be used for continuous realtime assessment of intraparenchymal blood flow, 25 comparable with measurement by xenonenhanced CT. 24 To establish  ... 
doi:10.3171/2009.8.focus09148 pmid:19795950 fatcat:s7sbzpjv3fatdjf73cjxkaxvnq

Cerebral hyperperfusion syndrome after endovascular covered stent grafting for a giant extracranial aneurysm of the internal carotid artery

Sakyo Hirai, Kuniyasu Saigusa, Yasuhiro Norisue, Shigeru Nemoto
2015 Journal of Vascular Surgery Cases  
Symptomatic giant extracranial internal carotid artery (ICA) aneurysm is a rare and surgically intractable disease. Several authors have described successful treatments for extracranial ICA aneurysm.  ...  We present a rare case of CHS after endovascular covered stent grafting for a giant extracranial ICA aneurysm. The CHS was successfully managed on the basis of hemodynamic monitoring.  ...  CT angiography revealed a left giant extracranial ICA aneurysm (5.5 cm in diameter) with recanalization but poor visualization of the left MCA and ICA, probably linked to stagnant blood flow in the aneurysm  ... 
doi:10.1016/j.jvsc.2014.11.004 pmid:31724647 pmcid:PMC6849972 fatcat:nqmhdvoej5hzzpefeb6t4cw6fi

Value of Perfusion CT, Transcranial Doppler Sonography, and Neurological Examination to Detect Delayed Vasospasm after Aneurysmal Subarachnoid Hemorrhage

Ekkehard Kunze, Mirko Pham, Furat Raslan, Christian Stetter, Jin-Yul Lee, Laszlo Solymosi, Ralf-Ingo Ernestus, Giles Hamilton Vince, Thomas Westermaier
2012 Radiology Research and Practice  
If detected in time, delayed cerebral vasospasm after aneurysmal subarachnoid hemorrhage (SAH) may be treated by balloon angioplasty or chemical vasospasmolysis in order to enhance cerebral blood flow  ...  Neurological assessment at close intervals is the most sensitive and specific parameter for cerebral vasospasm. PCT has a higher accuracy, sensitivity and negative predictive value than TCD.  ...  Elisabeth Barcsay for her dedicated work obtaining and analyzing Transcranial Doppler findings.  ... 
doi:10.1155/2012/231206 pmid:23050146 pmcid:PMC3462401 fatcat:llauj6azvzavxffjvshesrhavy
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