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Neuroradiology Journal

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https://www.readbyqxmd.com/read/29565222/spontaneous-intracranial-vertebral-artery-dissection-with-acute-ischemic-stroke-high-resolution-magnetic-resonance-imaging-findings
#1
Soo Young Yun, Young Jin Heo, Hae Woong Jeong, Jin Wook Baek, Hye Jung Choo, Jung Hwa Seo, Sung Tae Kim, Ji Young Lee, Sung Chul Jin
Background Acute ischemic stroke (AIS) more frequently develops in patients with intracranial vertebral artery dissection (VAD) than extracranial VAD, and is associated with possible poor clinical outcomes. The aim of this study is to compare high-resolution magnetic resonance imaging (HR-MRI) findings and clinical features of VAD with and without AIS. Methods Twenty-nine lesions from 27 patients (15 male and 12 female patients; age range = 28-73 years) who underwent diffusion MRI and 3T HR-MRI within seven days were included...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29532712/hydatid-disease-mr-imaging-of-calvarium-and-superior-sagittal-sinus-involvement
#2
Mustafa Kemal Demir, Ozlem Yapıcıer, Teyyub Hasanov, Baran Yılmaz, Türker Kılıç
Extra-axial hydatid disease (HD) is rare and may create a diagnostic challenge. Herein, we report an extremely rare case of calvarial HD with superior sagittal sinus invasion and an extension to the scalp with unusual magnetic resonance imaging findings simulating osteomyelitis and abscess. Recognition of detached endocystic membranes was the most important clue for the correct diagnosis. HD should be included in the differential diagnosis for a patient having a destructive skull lesion with peripheral enhancing extra-axial soft tissue component...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29513077/re-treatment-of-residual-aneurysms-after-flow-diversion-an-experimental-study
#3
Robert Fahed, Tim E Darsaut, Marc Kotowski, Igor Salazkin, Jean Raymond
Aim Flow diverters are increasingly used to treat aneurysms, but treatment is not always effective. The management of aneurysms that fail to occlude following flow diversion is problematic. We aimed to reproduce failures in an animal model and study re-treatment with additional flow diverters alone or with flow diverters and liquid embolic agent. Material and methods Twenty wide-necked aneurysms were created at the carotid-lingual bifurcation in 10 dogs, and were treated with flow diverters 4-6 weeks later...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29469668/review-of-de-novo-cerebral-arteriovenous-malformation-haemorrhage-risk-treatment-approaches-and-outcomes
#4
Xianli Lv, Guihuai Wang
Objective A small number of patients has been reported to develop a completely new or de novo arteriovenous malformation (AVM) after brain surgery, haemorrhage, head trauma or ischaemic stroke. The natural history of these lesions is unknown. In this review, both ruptured and unruptured de novo AVMs and their treatments were reviewed. Methods Published literature in the PubMed database citing 'de novo cerebral arteriovenous malformation' was reviewed. Additional studies were identified through reference searches in each reviewed article...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29464985/comparison-of-phase-contrast-mr-and-flow-simulations-for-the-study-of-csf-dynamics-in-the-cervical-spine
#5
Erika Kristina Lindstrøm, Jakob Schreiner, Geir Andre Ringstad, Victor Haughton, Per Kristian Eide, Kent-Andre Mardal
Background Investigators use phase-contrast magnetic resonance (PC-MR) and computational fluid dynamics (CFD) to assess cerebrospinal fluid dynamics. We compared qualitative and quantitative results from the two methods. Methods Four volunteers were imaged with a heavily T2-weighted volume gradient echo scan of the brain and cervical spine at 3T and with PC-MR. Velocities were calculated from PC-MR for each phase in the cardiac cycle. Mean pressure gradients in the PC-MR acquisition through the cardiac cycle were calculated with the Navier-Stokes equations...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29366361/role-of-time-resolved-cta-in-intracranial-arteriovenous-malformation-evaluation-at-128-slice-ct-in-comparison-with-digital-subtraction-angiography
#6
Rupinder Singh, Vivek Gupta, Chirag Ahuja, Ajay Kumar, Kanchan K Mukherjee, Niranjan Khandelwal
Introduction The present study aimed to evaluate the accuracy of time-resolved-computed tomographic angiography (TR-CTA) on a 128-slice CT scanner vis-à-vis cerebral digital subtraction angiography (DSA) in defining the morphological and haemodynamic characteristics of cerebral arteriovenous malformation (AVM). Methods Twenty-one patients (age range 10-46, mean 24.8 years) with clinical suspicion of AVM and three patients (age range 23-35, mean 24.3 years) with diagnosed AVM who were on follow-up underwent DSA and TR-CTA, on average 1...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29323624/sella-turcica-bridging-and-ossified-carotico-clinoid-ligament-correlation-with-sex-and-age
#7
Daniele Gibelli, Michaela Cellina, Stefano Gibelli, Marta Panzeri, Antonio Giancarlo Oliva, Giovanni Termine, Chiarella Sforza
Aim Sella turcica bridging and ossified carotico-clinoid ligament are two variants of the sella turcica, the origin of which is partially unknown. These variations should be properly recognised, as they may hamper the removal of the anterior clinoid process in surgical procedures. Therefore, our aim was to determine the prevalence of these two anatomical variants and to investigate their prevalence according to patient sex and age in a series of maxilla computed tomography scans. Materials and methods We revised 300 computed tomography scans of the head from northern Italian patients, stratified into three age groups (18-40 years, 41-60 years, >60 years): a logistic regression analysis was used to explore an association of sella turcica bridging with age and sex through Matlab software, also including a test for the extracted model ( P < 0...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29319396/detrimental-effect-of-systemic-vascular-risk-factors-on-brain-hemodynamic-function-assessed-with-mri
#8
Kevin S King, Min Sheng, Peiying Liu, Christopher D Maroules, Craig D Rubin, Ron M Peshock, Roderick W McColl, Hanzhang Lu
Background and purpose Vascular risk factors have been associated with decreased cerebral blood flow (CBF) but this is etiologically nonspecific and may result from vascular insufficiency or a response to decreased brain metabolic activity. We apply new MRI techniques to measure oxygen extraction fraction (OEF) and cerebral metabolic rate of oxygen consumption (CMRO2 ), hypothesizing that decreased CBF related to these vascular risk factors will be associated with increased OEF, confirming a primary vascular insufficiency...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29171341/diagnosis-of-a-tympanic-paraganglioma-with-ct-perfusion-imaging-a-technical-note-and-case-description
#9
Christoph J Maurer, Antje Aschendorff, Horst Urbach
Paragangliomas can be diagnosed accurately using magnetic resonance imaging and dynamic four-dimensional magnetic resonance angiography. Four-dimensional imaging uses the highly vascularised structure of these tumours, which results in a homogenous capillary blush and usually, due to the arteriovenous shunting, in an early draining vein. By these features the tumour can be differentiated from other neoplasms. The authors describe a case of a paraganglioma localised in the middle ear of an elderly patient. Magnetic resonance contraindications led to preoperative diagnostics with high resolution computed tomography of the temporal bone and additionally computed tomography perfusion imaging instead of magnetic resonance imaging with four-dimensional magnetic resonance angiography...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29154725/non-aneurysmal-subarachnoid-hemorrhage-when-is-a-second-angiography-indicated
#10
Asma Bashir, Ronni Mikkelsen, Leif Sørensen, Niels Sunde
Purpose Repeat imaging in patients with non-aneurysmal subarachnoid hemorrhage (NASAH) remains controversial. We aim to report our experience with NASAH with different hemorrhage patterns, and to investigate the need for further diagnostic workup to determine the underlying cause of hemorrhage. Method We conducted a retrospective analysis of all spontaneous SAH with an initial negative computed tomography (CT) with angiography (CTA) and/or digital subtraction angiography (DSA) from October 2011 through May 2017...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29125049/pseudoaneurysm-at-m3-of-the-middle-cerebral-artery-morphological-changes-on-serial-radiological-examinations
#11
Motohiro Nomura, Kentaro Mori, Issei Fukui, Kunio Yanagimoto, Hiroshi Shima, Naoki Muramatsu
A 20-year-old man presented with consciousness disturbance and hemiparesis, and computed tomography demonstrated subarachnoid and intracerebral hemorrhage. Angiography on admission demonstrated a slight irregularity of the middle cerebral artery (MCA) branch. Angiography on the 12th day showed a suspicious lesion at M3 of the left MCA. Angiography performed 24 days after the onset disclosed an aneurysm at M3. The aneurysm was trapped and resected after superficial temporal artery-MCA bypass. Pathological examinations revealed that this distal aneurysm was a pseudoaneurysm without vascular components in its dome...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28895453/extracranial-internal-carotid-artery-vasospasm-during-thrombectomy
#12
Isamu Miura, Akitsugu Kawashima, Masataka Hayashi, Akane Tanda, Tomomi Ishikawa, Takakazu Kawamata
The use of a stent retriever increases the risk of intracranial vasospasm. Here, we report the case of a man who developed severe vasospasm in a long segment of the extracranial internal carotid artery after mechanical irritation by a stent retriever inserted for the treatment of acute cerebral ischemia. A 47-year-old right-handed man presented with sudden-onset right-sided weakness and difficulty speaking. The patient's National Institutes of Health Stroke Scale score was 6 and he had an Alberta Stroke Program Early Computed Tomography Score of 9...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28853636/moyamoya-disease-a-rare-case-with-an-unusual-presentation
#13
Paolo Reganati, Lorenzo Carlo Pescatori, Riccardo Foà, Maurizio Cariati, Carla Uggetti
No abstract text is available yet for this article.
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28816615/in-stent-hypodense-area-at-two-weeks-following-carotid-artery-stenting-predicts-neointimal-hyperplasia-after-two-years
#14
Kentaro Yamashita, Jouji Kokuzawa, Tatsuya Kuroda, Satoru Murase, Morio Kumagai, Yasuhiko Kaku
Introduction It has not been reported how long the follow-up study after carotid artery stenting (CAS) should be continued. The purpose of the present study is to clarify the dynamic change of the in-stent neointimal layer and residual arterial lumen by two years following CAS using three-dimensional computed tomography angiography (3D CTA) with volume rendering. Methods Thirty-six stented carotid arteries in 34 consecutive patients were examined by 3D CTA with volume rendering at two weeks and 3, 6, 12, 24 months of follow-up...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28786314/cerebellar-cortical-vein-thrombosis-mimicking-a-vermian-tumor-case-report
#15
Marcelo D Vilela, Hugo As Pedrosa, Marco Antonio D Filho
Cortical vein thrombosis is an uncommon cause of stroke and generally occurs in the supratentorial compartment. Spontaneous venous thrombosis with infarction in the posterior fossa usually occurs in association with either dural sinus thrombosis and/or thrombosis of the petrosal vein, usually with venous infarction of the cerebellar hemisphere. Our goal is to present the case of a patient with thrombosis of cerebellar cortical veins, without sinus involvement, which mimicked a vermian cerebellar tumor.
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28691576/time-resolved-computed-tomography-angiography-in-the-evaluation-of-brain-arteriovenous-malformation-a-feasibility-study
#16
Rupinder Singh, Vivek Gupta, Chirag Ahuja, Niranjan Khandelwal
Background and purpose Digital subtraction angiography is the current gold standard for diagnosing as well as the follow-up of cerebral arteriovenous malformations. However, as it is invasive, relatively expensive and time-consuming, a non-invasive alternative is of interest. We aimed to evaluate the feasibility of time resolved computed tomography angiography (TR-CTA) in a series of five diagnosed cranial arteriovenous malformation patients, demonstrated by conventional digital subtraction angiography with respect to acquisition, depiction of angiographic phases and radiation exposure...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28660798/the-philosophy-of-unity-of-knowledge-and-action-in-interventional-neuroradiology-teaching
#17
Xianli Lv, Zhongxue Wu
Despite the continuing emphasis on the importance of clinical skills, these skills do not appear to be improving and may actually be declining. The 'unity of knowledge and action' is a medicine directed precisely at this disease. The 'unity of knowledge and action' helps to learn from failure and successes, learn from mistakes of predecessors and institute a behaviour that prevents repetition of these mistakes.
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28648102/posterior-communicating-artery-aneurysms-demonstrate-faster-interval-growth-than-other-growing-aneurysms
#18
Aichi Chien, Vicky Lau, Quan Yi, Warren Chang
Background Posterior communicating artery aneurysms are often associated with a high rupture risk. This study compares the differences in the rate of growth and morphological characteristics between growing posterior communicating artery aneurysms and other types of growing aneurysms. Materials and methods Thirteen patients with growing internal carotid artery aneurysms were scanned using Siemens 64 slice computed tomography scanners. Three patients had ophthalmic aneurysms, three had superior hypophyseal aneurysms and seven had posterior communicating artery aneurysms...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/28482739/absent-right-common-carotid-artery-associated-with-aberrant-right-subclavian-artery
#19
Akira Uchino, Kazuhiko Uwabe, Iichiro Osawa
Rarely, the external and internal carotid arteries arise separately from the brachiocephalic trunk and right subclavian artery (SA) or the aortic arch and reflect the absence of a common carotid artery (CCA). We report a 45-year-old man with absent right CCA associated with aberrant right SA, an extremely rare combination, diagnosed by computed tomography (CT) angiography during follow-up for postoperative aortic dissection. Retrospective careful observation of preoperative postcontrast CT revealed the absent right CCA...
June 2018: Neuroradiology Journal
https://www.readbyqxmd.com/read/29542363/reviewer-thank-you-list-2017
#20
(no author information available yet)
No abstract text is available yet for this article.
April 2018: Neuroradiology Journal
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