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https://www.readbyqxmd.com/read/28214089/reliability-of-noncontrast-enhancing-tumor-as-a-biomarker-of-idh1-mutation-status-in-glioblastoma
#1
Arian Lasocki, Alpha Tsui, Frank Gaillard, Mark Tacey, Katharine Drummond, Stephen Stuckey
Isocitrate dehydrogenase 1 (IDH1) mutations in gliomas have been associated with a frontal lobe location and a greater proportion of noncontrast-enhancing tumour (nCET). The purpose of our study was to validate the utility of MRI imaging features in predicting IDH1 mutations in glioblastomas. Pre-operative MRIs of new glioblastoma patients, consisting of at least FLAIR and T1-weighted post-contrast sequences, were reviewed by a neuroradiologist based primarily on the VASARI feature set. IDH1 mutation testing was performed on all patients using immunohistochemistry...
February 14, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28197712/outflow-angle-measurement-a-simple-approach-for-the-differential-diagnosis-of-intracranial-protrusion-with-a-branch-artery-arising-from-its-top
#2
Mo Chen, Hong-Mei Song, Ming-Hua Li, Wu Wang, Yong-Dong Li
PURPOSE: Magnetic resonance angiography (MRA) is an important diagnosis method for the detection of intracranial aneurysms (IAs), but it is not useful for differentiating between IA and infundibular dilatation (ID) in patients in whom imaging shows an intracranial protrusion with a branch artery at its top. The objective of this study was to introduce a new approach-measurement of the outflow angle (OA)-for differentiating between IA and ID in such cases. METHODS: The study included 7 patients with a total of 9 protrusions...
February 14, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28192548/association-of-collateral-blood-vessels-detected-by-arterial-spin-labeling-magnetic-resonance-imaging-with-neurological-outcome-after-ischemic-stroke
#3
Adam de Havenon, David R Haynor, David L Tirschwell, Jennifer J Majersik, Gordon Smith, Wendy Cohen, Jalal B Andre
Importance: Robust collateral blood vessels have been associated with better neurologic outcome following acute ischemic stroke (AIS). The most commonly used methods for identifying collaterals are contrast-based angiographic imaging techniques, which are not possible in all patients after AIS. Objective: To assess the association between the presence of collateral vessels identified using arterial spin labeling (ASL) magnetic resonance imaging, a technique that does not require exogenous administration of contrast, and neurologic outcome in patients after AIS...
February 13, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/28192386/spectrum-of-magnetic-resonance-imaging-features-in-unilateral-optic-tract-dysfunction
#4
Kristopher M Kowal, Francisco F Rivas Rodriguez, Ashok Srinivasan, Jonathan D Trobe
BACKGROUND: Optic tract dysfunction may be the predominant or only clinical manifestation of an intracranial disorder including mass legion, ischemic infarct, inflammatory disease, and trauma. Documentation of the neuroimaging features of these lesions is limited to reports mostly published before the availability of MRI. This study was undertaken to document the spectrum of MRI features in patients presenting with optic tract dysfunction. METHODS: A retrospective study from 2004 to 2015 at a single tertiary care neuro-ophthalmology service of 24 patients who had unilateral optic tract dysfunction defined by a homonymous hemianopia and a relative afferent pupil defect that could not be attributed to optic neuropathy or retinopathy...
March 2017: Journal of Neuro-ophthalmology: the Official Journal of the North American Neuro-Ophthalmology Society
https://www.readbyqxmd.com/read/28185669/electrical-stimulation-and-monitoring-devices-of-the-cns-an-imaging-review
#5
REVIEW
Sohil H Patel, Casey H Halpern, Timothy M Shepherd, Vincent M Timpone
Functional neurosurgery is a rapidly growing field with exciting future potential applications. This article describes currently used implanted electronic devices for neurologic stimulation and monitoring. The devices to be reviewed include invasive EEG electrodes, deep brain stimulator, motor cortex stimulator, responsive neurostimulation, osteo-integrated hearing aid, middle ear implant, cochlear implant, auditory brainstem implant, vagal nerve stimulator and spinal cord stimulator. Emphasis is placed on the normal components, function, positioning, potential complications and MRI safety of these devices...
February 6, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28183837/diagnostic-performance-of-ultrafast-brain-mri-for-evaluation-of-abusive-head-trauma
#6
S F Kralik, M Yasrebi, N Supakul, C Lin, L G Netter, R A Hicks, R A Hibbard, L L Ackerman, M L Harris, C Y Ho
BACKGROUND AND PURPOSE: MR imaging with sedation is commonly used to detect intracranial traumatic pathology in the pediatric population. Our purpose was to compare nonsedated ultrafast MR imaging, noncontrast head CT, and standard MR imaging for the detection of intracranial trauma in patients with potential abusive head trauma. MATERIALS AND METHODS: A prospective study was performed in 24 pediatric patients who were evaluated for potential abusive head trauma...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28183836/low-dose-ct-for-craniosynostosis-preserving-diagnostic-benefit-with-substantial-radiation-dose-reduction
#7
J C Montoya, L J Eckel, D R DeLone, A L Kotsenas, F E Diehn, L Yu, A C Bartley, R E Carter, C H McCollough, J G Fletcher
BACKGROUND AND PURPOSE: Given the positive impact of early intervention for craniosynostosis, CT is often performed for evaluation but radiation dosage remains a concern. We evaluated the potential for substantial radiation dose reduction in pediatric patients with suspected craniosynostosis. MATERIALS AND METHODS: CT projection data from pediatric patients undergoing head CT for suspected craniosynostosis were archived. Simulated lower-dose CT images corresponding to 25%, 10%, and 2% of the applied dose were created using a validated method...
February 9, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28182715/mr-angiography-allows-defining-severity-grades-of-cerebral-vasospasm-in-an-experimental-double-blood-injection-subarachnoid-hemorrhage-model-in-rats
#8
Vesna Malinova, Marios N Psychogios, Ioannis Tsogkas, Birte Koennecke, Kim Bleuel, Bogdan Iliev, Veit Rohde, Dorothee Mielke
OBJECTIVE: Magnetic resonance (MR) imaging has been used for the detection of cerebral vasospasm (VSP) related infarction in experimental subarachnoid hemorrhage (eSAH) in rats. Conventional angiography is generally used to visualize VSP, which is an invasive technique with a possible increase in morbidity and mortality. In this study we evaluated the validity of MR-angiography (MRA) in detecting VSP and its feasibility to define VSP severity grades after eSAH in rats. METHODS: SAH was induced using the double-hemorrhage model in 12 rats...
2017: PloS One
https://www.readbyqxmd.com/read/28175461/195%C3%A2-how-well-do-neuroradiologists-predict-the-side-of-trigeminal-neuralgia
#9
Amparo M Wolf, Ingrid Aguiar-Littig, Girish Fatterpekar, Douglas Kondziolka
No abstract text is available yet for this article.
August 1, 2016: Neurosurgery
https://www.readbyqxmd.com/read/28168635/imaging-of-post-surgical-treatment-and-of-related-complications-in-spinal-trauma
#10
REVIEW
F Caranci, G Leone, L Ugga, E Cesarano, R Capasso, S Schipani, A Bianco, P Fonio, F Briganti, L Brunese
Spinal trauma is a devastating event with a high morbidity and mortality. The rationale of imaging is to diagnose the traumatic abnormalities and characterize the type of injury, to estimate the severity of the lesions, to evaluate the potential spinal instability. In case of spinal instability, the goals of operative treatment are decompression of the spinal cord canal and stabilization of the disrupted vertebral column. Particularly, diagnostic imaging, mainly by CT and MR, has a main role in the post-treatment evaluation...
February 6, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28164776/inter-observer-variability-between-radiologists-reporting-on-cerebellopontine-angle-tumours-on-magnetic-resonance-imaging
#11
S R Teh, S Ranguis, P Fagan
BACKGROUND: Studies demonstrate the significance of intra- and inter-observer variability when measuring cerebellopontine angle tumours on magnetic resonance imaging, with measured differences as high as 2 mm. OBJECTIVE: To determine intra- and inter-observer measurement variability of cerebellopontine angle tumours in a specialised institution. METHODS: The magnetic resonance imaging maximal diameter of 12 randomly selected cerebellopontine angle tumours were independently measured by 4 neuroradiologists at a tertiary referral centre using a standard definition for maximal tumour diameter...
January 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28156249/utility-of-mri-based-disproportionately-enlarged-subarachnoid-space-hydrocephalus-scoring-for-predicting-prognosis-after-surgery-for-idiopathic-normal-pressure-hydrocephalus-clinical-research
#12
Narihide Shinoda, Osamu Hirai, Shinya Hori, Kazuyuki Mikami, Toshiaki Bando, Daisuke Shimo, Takahiro Kuroyama, Yoji Kuramoto, Masato Matsumoto, Yasushi Ueno
OBJECTIVE The presence of disproportionately enlarged subarachnoid space hydrocephalus (DESH) on brain imaging is a recognized finding of idiopathic normal pressure hydrocephalus (iNPH), but the features of DESH can vary across patients. The aim of this study was to evaluate the utility of MRI-based DESH scoring for predicting prognosis after surgery. METHODS In this single-center, retrospective cohort study, the DESH score was determined by consensus between a group of neurosurgeons, neurologists, and a neuroradiologist based on the preoperative MRI findings of the patients with suspected iNPH...
February 3, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28156051/ct-of-the-head-for-acute-stroke-diagnostic-performance-of-a-tablet-computer-prior-to-intravenous-thrombolysis
#13
Patrick D McLaughlin, Fiachra Moloney, Siobhan B O'Neill, Karl James, Lee Crush, Oisin Flanagan, Michael M Maher, Gerald Wyse, Noel Fanning
INTRODUCTION: The authors propose that tablet computers could benefit patients with acute stroke in the remote care setting, where time to and accuracy of CT interpretation greatly influences patient outcome. METHODS: One hundred and fifty consecutive patients who presented to the Emergency Department of a tertiary referral neurosciences centre within a time window suitable for intravenous thrombolytic therapy were included. Images were wirelessly transmitted to a tablet computer (iPad 3rd Generation, model = A1430, Apple, Cupertino, CA) and were reviewed by radiologists with three levels of experience for signs of intracranial haemorrhage, large vessel occlusion and parenchymal infarction...
February 3, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28145215/-incidental-findings-on-brain-mriprevalence-clinical-management-and-natural-course
#14
D Bos, A van der Lugt, M A Ikram, M W Vernooij
OBJECTIVE: Diagnostic brain imaging has been performed increasingly since the 1990s. A direct result of this is the rise in the detection of incidental findings. The objective of this study is to provide insight into the prevalence, clinical relevance and natural course of incidental findings on brain magnetic resonance imaging (MRI) scans. DESIGN: Prospective cohort study. METHOD: Within the framework of the Rotterdam study, 5800 participants underwent a brain MRI scan during the period 2005-2014...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/28125568/cluster-of-an-unusual-amnestic-syndrome-massachusetts-2012-2016
#15
Jed A Barash, Nick Somerville, Alfred DeMaria
In November 2015, a neurologist in the Boston, Massachusetts, area reported four cases of an uncommon amnestic syndrome involving acute and complete ischemia of both hippocampi, as identified by magnetic resonance imaging (MRI), to the Massachusetts Department of Public Health (MDPH) (1). A subsequent e-mail alert, generated by the Massachusetts Board of Registration in Medicine and sent to relevant medical specialists (including neurologists, neuroradiologists, and emergency physicians), resulted in the identification of 10 additional cases that had occurred during 2012-2016...
January 27, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28123471/endovascular-treatment-of-irregular-and-complicated-intracranial-aneurysms-with-coils-using-double-microcatheter-technique
#16
Yang Zhang, Ge Gao, Yingjiu Chao, Yu Chen, Jian Yu, Daqun Gu, Jianjun Wei, Chaoshi Niu, Xianming Fu
Embolisation of irregular and complicated aneurysms is a great challenge for neuroradiologists. To overcome possible complications of endovascular treatment of these type of aneurysms, methods such as intracranial stents, balloon remodelling, and the double microcatheter technique have been developed. The aim of the study was to report our preliminary experience with endovascular treatment of irregular and complicated intracranial aneurysm with coils using double microcatheter technique, and evaluation of its feasibility and clinical advantages...
January 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28120064/giant-basilar-artery-aneurysm-involving-the-origin-of-bilateral-posterior-cerebral-and-superior-cerebellar-arteries-neck-reconstruction-with-pconus-assisted-coiling
#17
Francesco Signorelli, Carmelo Lucio Sturiale, Giuseppe La Rocca, Alessio Albanese, Francesco D'Argento, Pierpaolo Mattogno, Alfredo Puca, Massimiliano Visocchi, Enrico Marchese, Alessandro Pedicelli
Giant aneurysms of the basilar artery are rare and are frequently associated with obstructive hydrocephalus and brainstem compression. Treatment still remains a challenge both for neurosurgeons and for interventional neuroradiologists. Cases reported in the literature are anecdotal and, overall, their outcomes are poor. We present the case of a patient with a giant aneurysm of the basilar artery tip, involving the origin of both the posterior cerebral and superior cerebellar arteries, who underwent coiling and ventriculoperitoneal shunting for associated obstructive hydrocephalus...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28118025/inter-rater-variability-for-ct-angiography-evaluation-between-neurologists-and-neuroradiologist-in-acute-stroke-patients
#18
Michal Bar, Jir Kra, Tomas Jonszta, Vaclav Marcian, Martin Kuliha, Robert Mikulík
OBJECTIVES: The diagnosis of arterial occlusion has a considerable impact on the indication of mechanical thrombectomy, and computed tomography angiography (CTA) is recommended in management of acute stroke. The goal of present study is to assess the inter-rater agreement in the diagnosis of occlusion of intracranial arteries on CTA between a neuroradiologist and neurologists. METHODS: CTA images of 75 acute-stroke patients were evaluated for occlusion of intracranial arteries by an experienced interventional neuroradiologist, stroke and general neurologist...
January 24, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28104635/transverse-sinus-stenosis-is-the-most-sensitive-mr-imaging-correlate-of-idiopathic-intracranial-hypertension
#19
P P Morris, D F Black, J Port, N Campeau
BACKGROUND AND PURPOSE: Patients with idiopathic intracranial hypertension have transverse sinus stenosis on gadolinium-bolused MRV, but other MR imaging signs are less consistently seen. Our aim was to demonstrate that transverse sinus stenosis could be identified on conventional MR imaging, and this identification would allow improved diagnostic sensitivity to this condition. MATERIALS AND METHODS: MR imaging and MRV images from 63 patients with idiopathic intracranial hypertension and 96 controls were reviewed by using 3 independent procedures...
January 19, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28102639/validation-of-an-mri-rating-scale-for-amyloid-related-imaging-abnormalities
#20
Arianne Bechten, Mike P Wattjes, Derk D Purcell, Esther Sanchez Aliaga, Marita Daams, H Robert Brashear, H Michael Arrighi, Frederik Barkhof
INTRODUCTION: Immunotherapeutic agents against amyloid beta (Aβ) are associated with adverse events, including amyloid-related imaging abnormalities with edema and effusion (ARIA-E). Recently, a magnetic resonance imaging (MRI) rating scale was developed for ARIA-E detection and classification. The aim of this study was to validate the use of this rating scale in a larger patient group with multiple raters. METHODS: MRI scans of 75 patients (29 with known ARIA-E and 46 control subjects) were analyzed by five neuroradiologists with different degrees of expertise, according to the ARIA-E rating scale...
January 19, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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