17,362 results match your criteria Brain Aneurysm Imaging


The Role of Hemodynamics through the Circle of Willis in the Development of Intracranial Aneurysm: A Systematic Review of Numerical Models.

J Pers Med 2022 Jun 20;12(6). Epub 2022 Jun 20.

Department of Neurosurgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands.

The role of regional hemodynamics in the intracranial aneurysmal formation, growth, and rupture has been widely discussed based on numerical models over the past decades. Variation of the circle of Willis (CoW), which results in hemodynamic changes, is associated with the aneurysmal formation and rupture. However, such correlation has not been further clarified yet. Read More

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Follow-Up Assessment of Intracranial Aneurysms Treated with Endovascular Coiling: Comparison of Compressed Sensing and Parallel Imaging Time-of-Flight Magnetic Resonance Angiography.

Tomography 2022 Jun 18;8(3):1608-1617. Epub 2022 Jun 18.

IRCCS Istituto delle Scienze Neurologiche di Bologna, UOC di Neuroradiologia, 40139 Bologna, Italy.

The aim of our study was to compare compressed sensing (CS) time-of-flight (TOF) magnetic resonance angiography (MRA) with parallel imaging (PI) TOF MRA in the evaluation of patients with intracranial aneurysms treated with coil embolization or stent-assisted coiling. We enrolled 22 patients who underwent follow-up imaging after intracranial aneurysm coil embolization. All patients underwent both PI TOF and CS TOF MRA during the same examination. Read More

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Deep Learning-Based Magnetic Resonance Imaging in Diagnosis and Treatment of Intracranial Aneurysm.

Comput Math Methods Med 2022 13;2022:1683475. Epub 2022 Jun 13.

Clinical Medical College of Panzhihua University, Panzhihua, 617000 Sichuan, China.

This study was focused on the positioning of the intracranial aneurysm in the magnetic resonance imaging (MRI) images using the deep learning-based U-Net model, to realize the computer-aided diagnosis of the intracranial aneurysm. First, a network was established based on the three-dimensional (3D) U-Net model, and the collected image data were input into the network to realize the automatic location and segmentation of the aneurysm. The 3D convolutional neural network (CNN) network can extract the aneurysm blood vessels to locate and identify the areas of possible aneurysms. Read More

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Endoscopic endonasal approach for simultaneously treating a pituitary adenoma coexisting with a paraclinoid aneurysm: illustrative case.

J Neurosurg Case Lessons 2022 Jun 20;3(25):CASE22130. Epub 2022 Jun 20.

Department of Neurosurgery, Yongzhou Central Hospital, Yongzhou City, Hunan Province, People's Republic of China.

Background: There is a certain incidence of pituitary adenomas coexisting with intracranial aneurysms, but a concurrent therapeutic strategy of tumor removal and aneurysm clipping via endoscopic endonasal approach is rarely reported. The indications and limitations of endoscopic endonasal approach surgery for this type of lesions are worth discussing.

Observations: The case of a pituitary tumor coexisting with a paraclinoid aneurysm was reviewed. Read More

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Factors affecting global neurocognitive status and frontal executive functions in the early stage after surgical clipping of unruptured anterior circulation aneurysms with respect to keyhole clipping and conventional clipping.

Acta Neurochir (Wien) 2022 Jun 22. Epub 2022 Jun 22.

Department of Neurosurgery, Division of Medicine, Faculty of Medical Sciences, University of Fukui, 23-3 Matsuokashimoaizuki, Eiheiji-cho, Yoshida-gun, Fukui, 910-1193, Japan.

Purpose: This study investigated the most significant factor for the preservation of the global neurocognitive status and frontal executive functions in the surgical clipping of unruptured anterior circulation aneurysms, specifically in keyhole and conventional clipping procedures.

Methods: The prospective study that was performed to examine the effects of aneurysm surgery on the patient's global neurocognitive status and frontal executive functions started on April 2016. After exclusion posterior circulation aneurysms, anterior communicating aneurysms treated by interhemispheric approach, giant aneurysms, and paraclinoid aneurysms, 23 patients who were enrolled before May 2017 were treated by conventional clipping, and 18 patients who were enrolled after June 2017 were treated by keyhole clipping. Read More

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Excessive platelet inhibition following Pipeline embolization of intracranial aneurysms.

J Neurointerv Surg 2022 Jun 21. Epub 2022 Jun 21.

Diagnostic Radiology and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, Maryland, USA.

Background: High levels of platelet inhibition have been associated with hemorrhagic complications following Pipeline embolization of intracranial aneurysms. We therefore titrate clopidogrel dosing to maintain a moderate level of platelet inhibition using the VerifyNow P2Y12 assay. However, many patients demonstrate dramatic increases in platelet inhibition following treatment despite being on a consistent antiplatelet regimen. Read More

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Improving visualization of three-dimensional aneurysm features via segmentation with upsampled resolution and gradient enhancement (SURGE).

J Neurointerv Surg 2022 Jun 21. Epub 2022 Jun 21.

Department of Mechanical & Industrial Engineering, University of Toronto, Toronto, Ontario, Canada

Background: Intracranial aneurysm neck width tends to be overestimated when measured with three-dimensional rotational angiography (3DRA) compared with two-dimensional digital subtraction angiography (2D-DSA), owing to high curvature at the neck. This may affect morphological and hemodynamic analysis in support of treatment planning. We present and validate a method for extracting high curvature features, such as aneurysm ostia, during segmentation of 3DRA images. Read More

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Torcular Craniotomy for Simultaneous Resection of a Tentorial Cerebellar Arteriovenous Malformation and Clipping of a Superior Cerebellar Artery Aneurysm: 2-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2022 Jul 9;23(1):e65. Epub 2022 May 9.

Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA.

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Tandem Overstacked Clipping for Giant Carotid Ophthalmic Aneurysm: 3-Dimensional Operative Video.

Oper Neurosurg (Hagerstown) 2022 Jul 11;23(1):e64. Epub 2022 May 11.

Laboratory of Microsurgical Neuroanatomy, Second Chair of Gross Anatomy, School of Medicine, University of Buenos Aires, Buenos Aires, Argentina.

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Ruptured Sinus of Valsalva Aneurysm in Apert Syndrome: Case report.

J Community Hosp Intern Med Perspect 2022 31;12(1):68-72. Epub 2022 Jan 31.

Department of Medicine, MedStar Health Union Memorial Hospital, Baltimore, MD, USA.

Background: Sinus of Valsalva aneurysm (SOVA) is a rare anomaly of the aorta that can be congenital or acquired. It can be associated with syndromes such as Marfan syndrome and Ehlers-Danlos syndrome. However, to our knowledge, it has never been described in a patient with Apert syndrome. Read More

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January 2022

Survey of the American Society of Neuroradiology Membership on the Use and Value of Intracranial Vessel Wall MRI.

AJNR Am J Neuroradiol 2022 Jun 16. Epub 2022 Jun 16.

Department of Radiology (Y.Q., B.A.W.), Johns Hopkins University, Baltimore, Maryland.

Background And Purpose: Intracranial vessel wall MR imaging is an emerging technique for intracranial vasculopathy assessment. Our aim was to investigate intracranial vessel wall MR imaging use by the American Society of Neuroradiology (ASNR) members at their home institutions, including indications and barriers to implementation.

Materials And Methods: The ASNR Vessel Wall Imaging Study Group survey on vessel wall MR imaging use, frequency, applications, MR imaging systems and field strength used, protocol development approaches, vendor engagement, reasons for not using vessel wall MR imaging, ordering-provider interest, and impact on clinical care, was distributed to the ASNR membership between April 2 and August 30, 2019. Read More

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Editorial for "Inflow Angle Impacts Morphology, Hemodynamics, and Inflammation of Side-Wall Intracranial Aneurysms".

Authors:
Jeremy D Collins

J Magn Reson Imaging 2022 Jun 16. Epub 2022 Jun 16.

Radiology, Mayo Clinic, Rochester, Minnesota, USA.

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[Infective intracranial aneurysm after valve replacement in a patient with infective endocarditis].

Zhonghua Xin Xue Guan Bing Za Zhi 2022 Jun;50(6):600-602

Medical Imaging Center, Affiliated Hospital of Yangzhou University, Yangzhou 225012, China.

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Balloon-Assisted Coil Embolization and Balloon Angioplasty for Post Subarachnoid Hemorrhage Vasospasm: Initial Experience with Scepter Mini Balloon.

Neurointervention 2022 Jun 15. Epub 2022 Jun 15.

Department of Diagnostic and Interventional Radiology, Nicosia General Hospital, Nicosia, Cyprus.

The scope of this technical note is to report our experience with balloon remodeling for wideneck aneurysms and balloon angioplasty of post-subarachnoid hemorrhage vasospasm using the novel Scepter Mini balloon (SMB). Five cases were treated with balloon remodeling for aneurysmal subarachnoid hemorrhage, 2 of which were additionally treated with angioplasty due to post-bleeding vasospasm. All patients had their aneurysm located on parent vessels with a diameter smaller than 2 mm. Read More

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Prevalence of unruptured intracranial aneurysms: impact of different definitions - the Tromsø Study.

J Neurol Neurosurg Psychiatry 2022 Jun 10. Epub 2022 Jun 10.

Department of Clinical Medicine, UiT The Arctic University, Tromso, Norway.

Background: Management of incidental unruptured intracranial aneurysms (UIAs) remains challenging and depends on their risk of rupture, estimated from the assumed prevalence of aneurysms and the incidence of aneurysmal subarachnoid haemorrhage. Reported prevalence varies, and consistent criteria for definition of UIAs are lacking. We aimed to study the prevalence of UIAs in a general population according to different definitions of aneurysm. Read More

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Ruptured intracranial infectious aneurysms: Single Canadian center experience.

Surg Neurol Int 2022 6;13:185. Epub 2022 May 6.

Department of Medical Imaging, University of Western Ontario, London, Canada.

Background: Ruptured intracranial infected aneurysms (IIAs) are relatively rare, but they portend high mortality. To the best of our knowledge, there is no Canadian case series on IIA, as well there is a relative paucity of international published experiences. Our purpose is to share the experience of a single Canadian tertiary center in managing ruptured IIA and to conduct a systematic review. Read More

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Differential Subsampling with Cartesian Ordering-MRA for Classifying Residual Treated Aneurysms.

AJNR Am J Neuroradiol 2022 06;43(6):887-892

From the Department of Radiological Sciences (P.S., A.C., K.N.), University of California Los Angeles, Los Angeles, California

Background And Purpose: Differential Subsampling with Cartesian Ordering (DISCO), an ultrafast high-spatial-resolution head MRA, has been introduced. We aimed to determine the diagnostic performance of DISCO-MRA in grading residual aneurysm in comparison with TOF-MRA in patients with treated intracranial aneurysms.

Materials And Methods: Patients with endovascular treatment and having undergone DISCO-MRA, TOF-MRA, and DSA were included for review. Read More

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Neutrophil-to-Lymphocyte Ratio Is Associated With Circumferential Wall Enhancement of Unruptured Intracranial Aneurysm.

Front Neurol 2022 20;13:879882. Epub 2022 May 20.

Department of Neurosurgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.

Background And Purpose: Neutrophil-lymphocyte ratio (NLR) predicts clinical outcomes in patients with stroke. Aneurysm wall enhancement (AWE) on high-resolution vessel wall magnetic resonance imaging (HR-VWI) is an inflammation marker for intracranial aneurysm (IA). This study aims to evaluate the association of NLR as a peripheral blood inflammatory marker with circumferential AWE in patients with IA. Read More

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Ruptured peripheral superior cerebellar artery dissecting aneurysms associated with primitive trigeminal artery: a case report.

BMC Neurol 2022 Jun 6;22(1):208. Epub 2022 Jun 6.

Department of Neurosurgery, Japanese Red Cross Nagahama Hospital, Miyamae-cho 14-7, Nagahama, Shiga, Japan.

Background: Persistent primitive trigeminal artery (PPTA) is a remnant of the carotid-vertebrobasilar anastomoses in the embryo. Although PPTAs are discovered incidentally in most cases, altered hemodynamics may lead to increased risk of stroke. To the best of our knowledge, no reports of PPTA associated with superior cerebellar artery (SCA) dissecting aneurysms have been published in the English language. Read More

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Clipping versus coiling for treatment of middle cerebral artery aneurysms: a retrospective Italian multicenter experience.

Neurosurg Rev 2022 Jun 4. Epub 2022 Jun 4.

Neurosurgical Unit, Ospedale Spirito Santo, Pescara, Italy.

Endovascular treatment has emerged as the predominant approach in intracranial aneurysms. However, surgical clipping is still considered the best treatment for middle cerebral artery (MCA) aneurysms in referral centers. Here we compared short- and long-term clinical and neuroradiological outcomes in patients with MCA aneurysms undergoing clipping or coiling in 5 Italian referral centers for cerebrovascular surgery. Read More

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Computed tomography perfusion imaging study of intracranial complex aneurysms treated by internal maxillary artery bypass grafting.

World Neurosurg 2022 May 30. Epub 2022 May 30.

Department of Neurosurgery, Beijing Pinggu Hospital, Beijing, China. Electronic address:

Background: Cerebral revascularization strategies through extracranial to intracranial (EC-IC) bypass, have been adopted in the management of complex intracranial aneurysms. The internal maxillary artery used as a donor in a bypass is an effective method. At present, there are few quantitative analyses of cerebral blood flow perfusion. Read More

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Inflow Angle Impacts Morphology, Hemodynamics, and Inflammation of Side-wall Intracranial Aneurysms.

J Magn Reson Imaging 2022 Jun 2. Epub 2022 Jun 2.

Center for Biomedical Imaging Research, Department of Biomedical Engineering, Tsinghua University, Beijing, China.

Background: Aneurysm inflow angle has been shown to be associated with hemodynamic changes by computational fluid dynamics. However, these studies were based on single aneurysm model and were limited to side-wall aneurysms.

Purpose: To investigate the association between inflow angle and morphology, hemodynamic, and inflammation of intracranial side-wall and bifurcation aneurysms. Read More

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Sex Hormones and Risk of Aneurysmal Subarachnoid Hemorrhage: A Mendelian Randomization Study.

Stroke 2022 Jun 2:101161STROKEAHA121038035. Epub 2022 Jun 2.

Department of Neurosurgery (R.M., M.W.A., J.M.C.v.D.), University of Groningen, University Medical Center Groningen, the Netherlands.

Background: The risk of aneurysmal subarachnoid hemorrhage (aSAH) is increased in postmenopausal women compared with men of similar age, suggesting a role for sex hormones. We aimed to explore whether sex hormones, and age at menarche/menopause have a causal effect on aSAH risk by conducting a 2-sample MR study (Mendelian randomization).

Methods: We obtained sex-specific genetic instruments for serum estradiol, bioavailable testosterone (BioT), SHBG (sex hormone-binding globulin), and age at menarche/menopause from genome-wide association studies. Read More

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Identification of ruptured intracranial aneurysms using the aneurysm-specific prediction score in patients with multiple aneurysms with subarachnoid hemorrhages- a Chinese population based external validation study.

BMC Neurol 2022 Jun 1;22(1):201. Epub 2022 Jun 1.

Department of Radiology, Banan People's Hospital, Chongqing Medical University, Chongqing, 400037, China.

Background: For patients with aneurysmal subarachnoid hemorrhages (SAHs) and multiple intracranial aneurysms (MIAs), a simple and fast imaging method that can identify ruptured intracranial aneurysms (RIAs) may have great clinical value. We sought to use the aneurysm-specific prediction score to identify RIAs in patients with MIAs and evaluate the aneurysm-specific prediction score.

Methods: Between May 2018 and May 2021, 134 patients with 290 MIAs were retrospectively analyzed. Read More

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Rupture of Vertebral Artery Dissecting Aneurysm after mRNA Anti-COVID-19 Vaccination: A Report of Two Cases.

NMC Case Rep J 2022 28;9:95-100. Epub 2022 Apr 28.

Department of Neurosurgery, Iwate Medical University, Shiwa, Iwate, Japan.

The coronavirus disease 2019 (COVID-19) pandemic continues to spread around the world, and widespread vaccination is considered the most effective way to end it. Although the efficacy of COVID-19 vaccines has been confirmed, their safety remains a concern. In this paper, we report two cases of ruptured vertebral artery dissecting aneurysm (VADA) immediately after messenger RNA (mRNA) anti-COVID-19 vaccination. Read More

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Surgical Resection and Clipping of an Atherosclerotic Partially Calcified MCA Trifurcation Aneurysm with Clipping of an Acomm Artery Aneurysm: 2-Dimensional Operative Video.

World Neurosurg 2022 May 25. Epub 2022 May 25.

Department of Neurosurgery, Rutgers- Robert Wood Johnson Medical School & University Hospital, New Brunswick, New Jersey, USA. Electronic address:

It is estimated within the western population that 10-13% of patients possess multiple intracranial aneurysms, and are linked to certain risk factors. Thrombotic aneurysms are a rare subgroup of complex aneurysms characterized by an organized intraluminal thrombus. They differ from typical saccular aneurysms in terms of morphology, natural history, symptomatology, and difficulty in treatment with conventional strategies. Read More

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Detection of cerebral aneurysm and intracranial vertebral dissection using non-enhanced magnetic resonance imaging in emergency setting: Emphasis on magnitude image of susceptibility-weighted image.

Interv Neuroradiol 2022 May 31:15910199221104613. Epub 2022 May 31.

Department of Neurosurgery, The Catholic University of Korea, The Catholic University of Korea, St Vincent's Hospital, Suwon, Republic of Korea.

Purpose: To evaluate image features and diagnostic performance of susceptibility-weighted image (SWI) in detection of intracranial vertebral artery dissection (VAD) and unruptured intracranial aneurysm (UIA).

Materials And Methods: From January 2015 to December 2021, symptomatic patients who underwent 3.0 T MR SWI were recruited. Read More

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Bioresorbable flow diverters for the treatment of intracranial aneurysms: review of current literature and future directions.

J Neurointerv Surg 2022 May 30. Epub 2022 May 30.

Biomedical Engineering and Physiology, Mayo Clinic Graduate School of Biomedical Sciences, Rochester, Minnesota, USA.

The use of flow diverters is a rapidly growing endovascular approach for the treatment of intracranial aneurysms. All FDA-approved flow diverters are composed of nitinol or cobalt-chromium, which will remain in the patient for the duration of their life. Bioresorbable flow diverters have been proposed by several independent investigators as the next generation of flow diverting devices. Read More

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Commentary: Coil Packing Density - Not Just for Cerebral Aneurysms.

Authors:
Martin G Radvany

J Vasc Interv Radiol 2022 Jun;33(6):639

Neurointerventional Radiology, Intellirad Imaging, Miami, Florida; Clinical Assistant Professor Radiology, Nova Southeastern University, Fort Lauderdale, Florida. Electronic address:

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Aneurysmal recurrence after successful flow-diversion embolization.

Interv Neuroradiol 2022 May 29:15910199221105175. Epub 2022 May 29.

Department of Neurosurgery, 12239Emory University School of Medicine, Atlanta, GA, USA.

Aneurysmal recurrence after successful flow-diversion embolization is exceptionally rare. The rarity of recurrence has called into question the yield of interval surveillance imaging. Here we report the case of a recurrent intracranial aneurysm despite complete angiographic resolution after flow-diversion therapy with a Pipeline embolization device (PED). Read More

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