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Clinical Neuroradiology

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https://www.readbyqxmd.com/read/28812108/ultra-early-detection-of-microcirculatory-injury-as-predictor-of-developing-delayed-cerebral-ischemia-after-aneurysmal-subarachnoid-hemorrhage
#1
Philipp Gölitz, Philip Hoelter, Julie Rösch, Karl Roessler, Frauke Knossalla, Arnd Doerfler
PURPOSE: Delayed cerebral ischemia (DCI) still remains a major complication after subarachnoid hemorrhage (SAH). The aim of our study was to evaluate whether flow analysis of admission digital subtraction angiography (DSA) using parametric color coding (PCC), a postprocessing algorithm, allows ultra-early identification of SAH patients at risk for developing subsequent symptomatic vasospasm. METHODS: In this study 52 patients who suffered SAH from aneurysm rupture, were retrospectively enrolled...
August 15, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28808729/twig-like-middle-cerebral-artery-a%C3%A2-seldom-vessel-anomaly-of-important-relevance
#2
Theodor Lutz, Peter Mönnings, Ilya Ayzenberg, Carsten Lukas
No abstract text is available yet for this article.
August 14, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28801828/a%C3%A2-new-classification-system-is-helpful-in-diagnosing-intracranial-complications-of-acute-mastoiditis-in-ct
#3
R Saat, G Kurdo, N Brandstack, A Laulajainen-Hongisto, J Jero, A Markkola
PURPOSE: To assess the usefulness of the new computed tomography (CT) classification criteria proposed by Horowitz et al. and their effect on inter-observer agreement when estimating intracranial complications of acute mastoiditis. METHODS: In this study 53 contrast-enhanced CT scans of patients with acute mastoiditis were each retrospectively reviewed by two radiologists, using two different assessment criteria for intracranial complications. According to the new criteria, intracranial CT findings in the perisinuous area were graded into four classes (I normal, II linear halo, III nodular halo ≤4 mm thick and IV nodular halo >4 mm thick), where classes III and IV indicate a high risk for epidural abscesses...
August 11, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28801806/editorial-report
#4
EDITORIAL
László Solymosi
No abstract text is available yet for this article.
August 11, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28801711/safety-of-onyx-transarterial-embolization-of-skull-base-dural-arteriovenous-fistulas-from-meningeal-branches-of-the-external-carotids-also-fed-by-meningeal-branches-of-internal-carotid-or-vertebral-arteries
#5
Thiago G Abud, Emmanuel Houdart, Jean-Pierre Saint-Maurice, Daniel G Abud, Carlos E Baccin, Andrew D Nguyen, Nitamar Abdala
PURPOSE: To analyze the angiographic and clinical results of transarterial embolization with Onyx (Medtronic-Covidien, Irvine, CA) in dural arteriovenous fistulas (DAVFs) partially fed by arteries arising from the carotid siphon or the vertebral arteries. METHODS: We isolated 40 DAVFs supplied by either the tentorial artery of the internal carotid artery (ICA) or the posterior meningeal artery of the vertebral artery. These DAVFs were embolized with Onyx through the middle meningeal artery or the occipital artery...
August 11, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28791434/progressive-occlusion-of-small-saccular-aneurysms-incompletely-occluded-after-stent-assisted-coil-embolization-analysis-of-related-factors-and-long-term-outcomes
#6
Jeong Wook Lim, Jeongjun Lee, Young Dae Cho
PURPOSE: Incompletely occluded aneurysms after coil embolization are subject to recanalization but occasionally progress to a totally occluded state. Deployed stents may actually promote thrombosis of coiled aneurysms. We evaluated outcomes of small aneurysms (<10 mm) wherein saccular filling with contrast medium was evident after stent-assisted coiling, assessing factors implicated in subsequent progressive occlusion. METHODS: Between September 2012 and June 2016, a total of 463 intracranial aneurysms were treated by stent-assisted coil embolization...
August 8, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28776156/progressive-spontaneous-resolution-of-an-anterior-communicating-artery-berry-aneurysm-following-radiation-treatment-for-nasopharyngeal-carcinoma
#7
Troy Wooding, Constantine Phatouros
No abstract text is available yet for this article.
August 3, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28766007/multicentric-chordoma-an-uncommon-and-incompletely-understood-presentation
#8
Jason R Jones, Anita Huttner, Ajay Malhotra
No abstract text is available yet for this article.
August 1, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28748256/bioresorbable-vascular-scaffolds-in-interventional-neuroradiology
#9
Anil Arat, Ergun Daglioglu, Ilkay Akmangit, Ahmet Peker, Murat Arsava, Mehmet Akif Topcuoglu, Deniz Belen
PURPOSE: Bioresorbable vascular scaffolds (BVS) have changed practice patterns in cardiology. These resorbable stents have not yet been utilized in the cerebrovascular circulation. We report the initial experiences with these devices in interventional neuroradiology. METHODS: A retrospective review of clinical presentations, imaging findings and follow-up results of all patients treated using a BVS by our neurovascular team was carried out using hospital electronic charts and the hospital radiographic archive system...
July 26, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28741075/brain-relaxometry-after-macrocyclic-gd-based-contrast-agent
#10
Andreas Müller, Alina Jurcoane, Burkhard Mädler, Philip Ditter, Hans Schild, Elke Hattingen
PURPOSE: To assess if ratios of T1-weighted (T1w) signal intensity (SI) and quantitative T1 relaxometry (qT1) change on serial administration of macrocyclic gadobutrol. METHODS: A total of 17 glioblastoma patients were scanned at 3.0 T magnetic resonance imaging (MRI) every 6 weeks after tumor resection with standard MRI and T1 and T2 relaxometry before and after gadobutrol administration. On co-registered images T1w SI was measured and relaxation times T1 (qT1) and quantitative T2 (qT2) were quantified in several deep grey matter nuclei as ratios relative to frontal white matter and to the pons...
July 24, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28721610/teaching-neuroimages-filling-out-in-cavernous-hemangioma-of-the-cavernous-sinus
#11
J Meincke, N Lützen, S Doostkam, H Urbach
No abstract text is available yet for this article.
July 18, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28702832/effect-of-perfusion-on-diffusion-kurtosis-imaging-estimates-for-in-vivo-assessment-of-integrated-2016-who-glioma-grades-a%C3%A2-cross-sectional-observational-study
#12
Johann-Martin Hempel, Jens Schittenhelm, Cornelia Brendle, Benjamin Bender, Georg Bier, Marco Skardelly, Ghazaleh Tabatabai, Salvador Castaneda Vega, Ulrike Ernemann, Uwe Klose
PURPOSE: To assess the role of perfusion-related signal decay on diffusion kurtosis imaging (DKI) estimates for in vivo stratification of glioma according to the integrated approach of the 2016 World Health Organization classification of tumors of the central nervous system (2016 CNS WHO). METHODS: In this study 77 patients with histopathologically confirmed glioma were retrospectively assessed between January 2013 and February 2017 in a prospective trial. Mean kurtosis (MK) and mean diffusivity (MD) metrics from DKI were assessed by two physicians blinded to the study from a volume of interest around the entire solid tumor...
July 12, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28667382/magnetic-resonance-imaging-and-clinical-features-in-acute-and-subacute-myelopathies
#13
REVIEW
Stefan Weidauer, Marlies Wagner, Michael Nichtweiß
Differential diagnosis of acute and subacute transverse myelopathy includes inflammatory, infectious, vascular, metabolic and paraneoplastic etiologies. Information on the diagnostic approach to transverse myelopathy with regard to daily clinical practice is provided. The differentiation between five lesion patterns on magnetic resonance imaging (MRI) in myelitis may be helpful: (1) longitudinal extensive transverse myelitis, (2) short segment ovoid or peripherally located, (3) "polio-like", (4) granulomatous and (5) segmental with rash...
June 30, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28656370/clinical-significance-of-circumferential-aneurysmal-wall-enhancement-in-symptomatic-patients-with-unruptured-intracranial-aneurysms-a%C3%A2-high-resolution-mri-study
#14
Qichang Fu, Sheng Guan, Chao Liu, Keyan Wang, Jingliang Cheng
BACKGROUND AND PURPOSE: The estimates on the risk of rupture of intracranial aneurysms remain a controversial topic. Circumferential aneurysmal wall enhancement (CAWE) on vessel wall magnetic resonance imaging (MRI) has been described in unstable aneurysms. Sentinel headaches and third nerve palsy are possible symptoms prior to the rupture of intracranial aneurysms. In this study, we aimed to demonstrate that CAWE could be associated with these symptoms. METHODS: We performed a retrospective analysis of consecutive symptomatic or asymptomatic patients with unruptured intracranial aneurysms who were examined by high-resolution MRI from October 2014 to November 2016...
June 27, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28643035/clinical-and-imaging-presentation-of-a%C3%A2-patient-with-beta-propeller-protein-associated-neurodegeneration-a%C3%A2-rare-and-sporadic-form-of-neurodegeneration-with-brain-iron-accumulation-nbia
#15
Elke Hattingen, Nikolaus Handke, Kirsten Cremer, Sabine Hoffjan, Guido Matthias Kukuk
Neurodegeneration with brain iron accumulation (NBIA) is a heterogeneous group of inherited neurologic disorders with iron accumulation in the basal ganglia, which share magnetic resonance (MR) imaging characteristics, histopathologic and clinical features. According to the affected basal nuclei, clinical features include extrapyramidal movement disorders and varying degrees of intellectual disability status. The most common NBIA subtype is caused by pathogenic variants in PANK2. The hallmark of MR imaging in patients with PANK2 mutations is an eye-of-the-tiger sign in the globus pallidus...
June 22, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28623378/carotid-stenting-in-neuroradiology-a%C3%A2-short-journey-from-the-past-to-current-debates
#16
REVIEW
Joachim Berkefeld, Marlies Wagner, Richard du Mesnil
After a period of stagnation due to negative results of randomized trials for patients with symptomatic stenosis, the relevance of carotid artery stenting (CAS) is increasing again. CAS has become an important and evidence-based part of interventional stroke treatment. Our ability to manage acute recanalization of carotid occlusions and other niche indications properly led some skeptical neurologists to trust in carotid intervention for elective cases as well. The evolution of CAS from initial euphoria to more realistic views under consideration of trial results and guidelines is reviewed...
June 16, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28589484/longitudinal-volume-quantification-of-deep-medullary-veins-in-patients-with-cerebral-venous-sinus-thrombosis-venous-volume-assessment-in-cerebral-venous-sinus-thrombosis-using-swi
#17
A K Dempfle, A Harloff, F Schuchardt, J Bäuerle, S Yang, H Urbach, K Egger
PURPOSE: Susceptibility-weighted imaging (SWI) visualizes small cerebral veins with high sensitivity and could, thus, enable quantification of hemodynamics of deep medullary veins. We aimed to evaluate volume changes of deep medullary veins in patients with acute cerebral venous sinus thrombosis (CVST) over time in comparison to healthy controls. METHODS: All magnetic resonance imaging (MRI) experiments were executed at 3 T using a 32-channel head coil. Based on SWI and semiautomatic postprocessing (statistical parametric mapping [SPM8] and ANTs), the volume of deep medullary veins was quantified in 14 patients with acute CVST at baseline and the 6‑month follow-up, as well as in 13 healthy controls undergoing repeated MRI examination with an interscan interval of at least 1 month...
June 6, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28577042/intra-suprasellar-schwannoma-presumably-originating-from-the-internal-carotid-artery-wall-case-report-and-review-of-the-literature
#18
Sohi Bae, Sung Soo Ahn, Jong Hee Chang, Se Hoon Kim
Intracranial schwannomas are common but intra-suprasellar schwannomas are extremely rare. We represent the case of a 57-year-old woman with an intra-suprasellar tumor that was presurgically diagnosed as an anterior clinoidal meningioma. Intraoperatively it adhered tightly to the internal carotid artery wall and could not easily be dissected, possibly leading to profuse hemorrhage and sacrifice of the carotid artery with coil embolization. Histopathology demonstrated a schwannoma. We reviewed and summarized the clinical, imaging, and intraoperative findings of previously reported intra-suprasellar schwannomas...
June 2, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28573334/retrieval-of-migrated-volume-coils-using-different-clot-retrievers-in-a%C3%A2-porcine-model
#19
Andreas Simgen, Toshiki Tomori, Ruben Mühl-Benninghaus, Hagen Bomberg, Umut Yilmaz, Heiko Körner, Matthias W Laschke, Michael D Menger, Wolfgang Reith
PURPOSE: During endovascular treatment of intracranial aneurysms using coils, migration is a serious complication that increases neurological morbidity. The aim of this experimental study was to assess the effectiveness and complications of retrieving volume coils with different, currently available clot retrievers in a porcine model. METHODS: Volume coils of three-dimensional (3D) shape and different sizes were placed in the axillary artery of pigs. By means of 4 different clot retrievers (Trevo ProVue; Solitaire FR; 3D-Separator; ERIC) a total of 40 retrieval maneuvers (10 per retriever) were performed by deploying the retrievers within the migrated coils and trying to trap parts of the coils by advancing the microcatheter...
June 1, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28466126/uncommon-cranial-meningioma-key-imaging-features-on-conventional-and-advanced-imaging
#20
REVIEW
Nader Zakhari, Carlos Torres, Mauricio Castillo, Thanh B Nguyen
Given the high incidence of intracranial meningiomas encountered in clinical practice, it is not uncommon to find rare subtypes of meningioma, with unusual imaging findings. These commonly represent a diagnostic challenge. In this article, we review the imaging appearance of typical meningioma on conventional and advanced imaging as well as the key imaging features of multiple uncommon subtypes: cystic, microcystic, lipomatous, chordoid, angiomatous, intraosseous, extracranial, atypical/malignant, and tumor-to-tumor metastasis (also known as collision tumors)...
June 2017: Clinical Neuroradiology
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