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https://www.readbyqxmd.com/read/28731395/nasoseptal-flap-necrosis-a-rare-complication-of-endoscopic-endonasal-surgery
#1
Joseph D Chabot, Chirag R Patel, Marion A Hughes, Eric W Wang, Carl H Snyderman, Paul A Gardner, Juan C Fernandez-Miranda
OBJECTIVE The vascularized nasoseptal flap (NSF) has become the workhorse for skull base reconstruction during endoscopic endonasal surgery (EES) of the ventral skull base. Although infrequently reported, as with any vascularized flap the NSF may undergo ischemic necrosis and become a nidus for infection. The University of Pittsburgh Medical Center's experience with NSF was reviewed to determine the incidence of necrotic NSF in patients following EES and describe the clinical presentation, imaging characteristics, and risk factors associated with this complication...
July 21, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28727326/-evaluation-of-an-outpatient-multidisciplinary-neuro-hiv-clinic-by-the-patients-and-referring-doctors
#2
Kevin Vallotton, Mélanie Métral, Oury Chocron, Reto Meuli, Deolinda Alves, Renaud Du Pasquier, Matthias Cavassini
The neurocognitive complaints among HIV infected patients remain frequent, and to establish their etiology can be challenging. We created in 2011 an outpatient Neuro-HIV clinical platform that takes advantage of a multidisciplinary approach with 5 specialists (neuropsychologist, neurologist, psychiatrist, infectiologist and neuroradiologist). In order to estimate its utility, we conducted two questionnaire-based interviews by phone calls with the patients and their referring physicians. Three quarters of both the patients and the physicians interviewed consider the platform useful or essential...
April 12, 2017: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28723713/somatotopic-fascicular-lesions-of-the-brachial-plexus-demonstrated-by-high-resolution-magnetic-resonance-neurography
#3
Tim Hilgenfeld, Johann Jende, Daniel Schwarz, Philipp Bäumer, Jennifer Kollmer, Sabine Heiland, Martin Bendszus, Mirko Pham
OBJECTIVES: The aim of this study was to evaluate whether high-resolution brachial plexus (BP) magnetic resonance neurography (MRN) is capable of (1) distinguishing patients with compressive neuropathy or noncompressive plexopathy from age- and sex-matched controls, (2) discriminating between patients with compressive neuropathy and noncompressive plexopathy, and (3) detecting spatial lesion patterns suggesting somatotopic organization of the BP. MATERIALS AND METHODS: Thirty-six patients (50...
July 18, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28711177/size-of-facial-port-wine-birthmark-may-predict-neurologic-outcome-in-sturge-weber-syndrome
#4
Malgorzata Dymerska, Anna Y Kirkorian, Elizabeth A Offermann, Doris D Lin, Anne M Comi, Bernard A Cohen
OBJECTIVE: To determine whether the size of the birthmark in patients with Sturge-Weber syndrome (SWS) who have brain involvement can help predict neurologic disability. STUDY DESIGN: Fifty-one patients with SWS with facial birthmarks and brain involvement documented on magnetic resonance imaging were included in this retrospective chart review. A neuroradiologist, blinded to all clinical information, assigned a previously validated SWS neuroimaging score. A pediatric neurologist prospectively assigned previously validated neurologic severity scores, based on seizures, hemiparesis, visual field cut, and cognitive impairments...
July 12, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28708731/noncontrast-hybrid-arterial-spin-labeled-imaging-of-the-intracranial-arteries
#5
Ruth P Lim, Elena Trajcevska, Farah Al Rawi, Dinesh Gooneratne, Windell Ang, Yuliya Perchyonok, Gregory Fitt, Andrew Kemp, Shivraman Giri, Davide Piccini, Amy Brodtmann, Helen Dewey, Ioannis Koktzoglou
OBJECTIVE: The purpose of this study is to evaluate feasibility, image quality (IQ), and accuracy of noncontrast hybrid arterial spin labeling (NoHASL) magnetic resonance angiography (MRA) compared with time of flight (TOF) MRA and contrast-enhanced (CE) MRA in patients with known/suspected cerebrovascular ischemia. METHODS: Thirty inpatients were imaged at 1.5 T. Two neuroradiologists assessed 630 intracranial arterial segments for IQ (1, nondiagnostic; 3, satisfactory for diagnosis; and 5, excellent)...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28708730/physiological-laterality-of-superficial-cerebral-veins-on-susceptibility-weighted-imaging
#6
Satoshi Matsushima, Tetsuya Shimizu, Taku Gomi, Kunihiko Fukuda
OBJECTIVE: The purpose of this study is to evaluate whether laterality of the superficial cerebral veins can be seen on susceptibility-weighted imaging (SWI) in patients with no intracranial lesions that affect venous visualization. METHODS: We retrospectively evaluated 386 patients who underwent brain magnetic resonance imaging including SWI in our institute. Patients with a lesion with the potential to affect venous visualization on SWI were excluded. Two neuroradiologists visually evaluated the findings and scored the visualization of the superficial cerebral veins...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28705821/pacemakers-in-mri-for-the-neuroradiologist
#7
REVIEW
A W Korutz, A Obajuluwa, M S Lester, E N McComb, T A Hijaz, J D Collins, S Dandamudi, B P Knight, A J Nemeth
Cardiac implantable electronic devices are frequently encountered in clinical practice in patients being screened for MR imaging examinations. Traditionally, the presence of these devices has been considered a contraindication to undergoing MR imaging. Growing evidence suggests that most of these patients can safely undergo an MR imaging examination if certain conditions are met. This document will review the relevant cardiac implantable electronic devices encountered in practice today, the background physics/technical factors related to scanning these devices, the multidisciplinary screening protocol used at our institution for scanning patients with implantable cardiac devices, and our experience in safely performing these examinations since 2010...
July 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28705819/mri-of-the-swallow-tail-sign-a-useful-marker-in-the-diagnosis-of-lewy-body-dementia
#8
S Shams, D Fällmar, S Schwarz, L-O Wahlund, D van Westen, O Hansson, E-M Larsson, S Haller
BACKGROUND AND PURPOSE: There are, to date, no MR imaging diagnostic markers for Lewy body dementia. Nigrosome 1, containing dopaminergic cells, in the substantia nigra pars compacta is hyperintense on SWI and has been called the swallow tail sign, disappearing with Parkinson disease. We aimed to study the swallow tail sign and its clinical applicability in Lewy body dementia and hypothesized that the sign would be likewise applicable in Lewy body dementia. MATERIALS AND METHODS: This was a retrospective cross-sectional multicenter study including 97 patients (mean age, 65 ± 10 years; 46% women), consisting of the following: controls (n = 21) and those with Lewy body dementia (n = 19), Alzheimer disease (n = 20), frontotemporal lobe dementia (n = 20), and mild cognitive impairment (n = 17)...
July 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28705816/diagnostic-performance-of-a-10-minute-gadolinium-enhanced-brain-mri-protocol-compared-with-the-standard-clinical-protocol-for-detection-of-intracranial-enhancing-lesions
#9
J Fagundes, M G Longo, S Y Huang, B R Rosen, T Witzel, K Heberlein, R G Gonzalez, P Schaefer, O Rapalino
BACKGROUND AND PURPOSE: The development of new MR imaging scanners with stronger gradients and improvement in coil technology, allied with emerging fast imaging techniques, has allowed a substantial reduction in MR imaging scan times. Our goal was to develop a 10-minute gadolinium-enhanced brain MR imaging protocol with accelerated sequences and to evaluate its diagnostic performance compared with the standard clinical protocol. MATERIALS AND METHODS: Fifty-three patients referred for brain MR imaging with contrast were scanned with a 3T scanner...
July 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28688480/an-intelligent-support-system-for-automatic-detection-of-cerebral-vascular-accidents-from-brain-ct-images
#10
Elmira Hajimani, M G Ruano, A E Ruano
OBJECTIVE: This paper presents a Radial Basis Functions Neural Network (RBFNN) based detection system, for automatic identification of Cerebral Vascular Accidents (CVA) through analysis of Computed Tomographic (CT) images. METHODS: For the design of a neural network classifier, a Multi Objective Genetic Algorithm (MOGA) framework is used to determine the architecture of the classifier, its corresponding parameters and input features by maximizing the classification precision, while ensuring generalization...
July 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28687375/post-operative-stereotactic-radiosurgery-versus-observation-for-completely-resected-brain-metastases-a-single-centre-randomised-controlled-phase-3-trial
#11
Anita Mahajan, Salmaan Ahmed, Mary Frances McAleer, Jeffrey S Weinberg, Jing Li, Paul Brown, Stephen Settle, Sujit S Prabhu, Frederick F Lang, Nicholas Levine, Susan McGovern, Erik Sulman, Ian E McCutcheon, Syed Azeem, Daniel Cahill, Claudio Tatsui, Amy B Heimberger, Sherise Ferguson, Amol Ghia, Franco Demonte, Shaan Raza, Nandita Guha-Thakurta, James Yang, Raymond Sawaya, Kenneth R Hess, Ganesh Rao
BACKGROUND: After brain metastasis resection, whole brain radiotherapy decreases local recurrence, but might cause cognitive decline. We did this study to determine if stereotactic radiosurgery (SRS) to the surgical cavity improved time to local recurrence compared with that for surgical resection alone. METHODS: In this randomised, controlled, phase 3 trial, we recruited patients at a single tertiary cancer centre in the USA. Eligible patients were older than 3 years, had a Karnofsky Performance Score of 70 or higher, were able to have an MRI scan, and had a complete resection of one to three brain metastases (with a maximum diameter of the resection cavity ≤4 cm)...
July 4, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28687122/evaluation-of-ex-vivo-9-4t-mri-in-post-surgical-specimens-from-temporal-lobe-epilepsy-patients
#12
Benjamin Y M Kwan, Fateme Salehi, Ryan Kope, Donald H Lee, Manas Sharma, Robert Hammond, Jorge G Burneo, David Steven, Terry Peters, Ali R Khan
PURPOSE: This study evaluates hippocampal pathology through usage of ultra-high field 9.4T ex-vivo imaging of resected surgical specimens in patients who have undergone temporal lobe epilepsy surgery. METHOD AND MATERIALS: This is a retrospective interpretation of prospectively acquired data. MRI scanning of resected surgical specimens from patients who have undergone temporal lobe epilepsy surgery was performed on a 9.4T small bore Varian MR magnet. Structural images employed a balanced steady-state free precession sequence (TrueFISP)...
July 4, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28684454/diagnostic-utility-of-increased-stir-signal-in-the-posterior-atlanto-occipital-and-atlantoaxial-membrane-complex-on-mri-in-acute-c1-c2-fracture
#13
Y-M Chang, G Kim, N Peri, E Papavassiliou, R Rojas, R A Bhadelia
BACKGROUND AND PURPOSE: Acute C1-C2 fractures are difficult to detect on MR imaging due to a paucity of associated bone marrow edema. The purpose of this study was to determine the diagnostic utility of increased STIR signal in the posterior atlanto-occipital and atlantoaxial membrane complex (PAOAAM) in the detection of acute C1-C2 fractures on MR imaging. MATERIALS AND METHODS: Eighty-seven patients with C1-C2 fractures, 87 with no fractures, and 87 with other cervical fractures with acute injury who had both CT and MR imaging within 24 hours were included...
July 6, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28676986/incidental-findings-on-cerebral-mri-in-twins-the-older-australian-twins-study
#14
Rebecca Koncz, Adith Mohan, Laughlin Dawes, Anbupalam Thalamuthu, Margaret Wright, David Ames, Teresa Lee, Julian Trollor, Wei Wen, Perminder Sachdev
Incidental findings on structural cerebral magnetic resonance imaging (MRI) are common in healthy subjects, and the prevalence increases with age. There is a paucity of data regarding incidental cerebral findings in twins. We examined brain MRI data acquired from community-dwelling older twins to determine the prevalence and concordance of incidental cerebral findings, as well as the associated clinical implications. Participants (n = 400) were drawn from the Older Australian Twins Study. T1-weighted and T2-weighted fluid-attenuated inversion recovery (FLAIR) cerebral MRI scans were systematically reviewed by a trained, blinded clinician...
July 4, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28673811/fluid-attenuated-inversion-recovery-vascular-hyperintensities-in-patients-with-transient-ischemic-attack
#15
Marcelo Marinho de Figueiredo, Edson Amaro Júnior, Maramélia Araújo de Miranda Alves, Marcela Vazzoler, Renata Carolina Acre Nunes Miranda, Gisele Sampaio Silva
BACKGROUND: Fluid-attenuated inversion recovery (FLAIR) vascular hyperintensities (FVHs) are common in patients with acute ischemic stroke, possibly representing impaired hemodynamics in the ischemic territory due to intracranial steno-occlusive disease. There are few reports on FVHs in patients with transient ischemic attack (TIA). AIMS: We investigated the prevalence of FVHs and its clinical correlations in patients with TIA. METHODS: We evaluated consecutive patients admitted with TIA from February 2009 to June 2012 who had undergone magnetic resonance imaging within 30 hours of symptoms onset and intracranial and extracranial vascular imaging...
June 30, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28670165/efficacy-of-maximum-intensity-projection-of-contrast-enhanced-3d-turbo-spin-echo-imaging-with-improved-motion-sensitized-driven-equilibrium-preparation-in-the-detection-of-brain-metastases
#16
Yun Jung Bae, Byung Se Choi, Kyung Mi Lee, Yeon Hong Yoon, Leonard Sunwoo, Cheolkyu Jung, Jae Hyoung Kim
OBJECTIVE: To evaluate the diagnostic benefits of 5-mm maximum intensity projection of improved motion-sensitized driven-equilibrium prepared contrast-enhanced 3D T1-weighted turbo-spin echo imaging (MIP iMSDE-TSE) in the detection of brain metastases. The imaging technique was compared with 1-mm images of iMSDE-TSE (non-MIP iMSDE-TSE), 1-mm contrast-enhanced 3D T1-weighted gradient-echo imaging (non-MIP 3D-GRE), and 5-mm MIP 3D-GRE. MATERIALS AND METHODS: From October 2014 to July 2015, 30 patients with 460 enhancing brain metastases (size > 3 mm, n = 150; size ≤ 3 mm, n = 310) were scanned with non-MIP iMSDE-TSE and non-MIP 3D-GRE...
July 2017: Korean Journal of Radiology: Official Journal of the Korean Radiological Society
https://www.readbyqxmd.com/read/28667359/sensitivity-of-susceptibility-weighted-imaging-in-detecting-developmental-venous-anomalies-and-associated-cavernomas-and-microhemorrhages-in-children
#17
Allen Young, Andrea Poretti, Thangamadhan Bosemani, Reema Goel, Thierry A G M Huisman
PURPOSE: Developmental venous anomalies (DVA) are common neuroimaging abnormalities that are traditionally diagnosed by contrast-enhanced T1-weighted images as the gold standard. We aimed to evaluate the sensitivity of SWI in detecting DVA and associated cavernous malformations (CM) and microhemorrhages in children in order to determine if SWI may replace contrast-enhanced MRI sequences. METHODS: Contrast-enhanced T1-weighted images were used as diagnostic gold standard for DVA...
June 30, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28663263/how-common-is-signal-intensity-increase-in-optic-nerve-segments-on-3d-double-inversion-recovery-sequences-in-visually-asymptomatic-patients-with-multiple-sclerosis
#18
T Sartoretti, E Sartoretti, S Rauch, C Binkert, M Wyss, D Czell, S Sartoretti-Schefer
BACKGROUND AND PURPOSE: In postmortem studies, subclinical optic nerve demyelination is very common in patients with MS but radiologic demonstration is difficult and mainly based on STIR T2WI. Our aim was to evaluate 3D double inversion recovery MR imaging for the detection of subclinical demyelinating lesions within optic nerve segments. MATERIALS AND METHODS: The signal intensities in 4 different optic nerve segments (ie, retrobulbar, canalicular, prechiasmatic, and chiasm) were evaluated on 3D double inversion recovery MR imaging in 95 patients with MS without visual symptoms within the past 3 years and in 50 patients without optic nerve pathology...
June 29, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28662312/accuracy-of-computed-tomography-imaging-criteria-in-the-diagnosis-of-adult-open-globe-injuries-by-neuroradiology-and-ophthalmology
#19
Eric L Crowell, Vivek A Koduri, Emilio P Supsupin, Robert E Klinglesmith, Alice Z Chuang, Gene Kim, Laura A Baker, Robert M Feldman, Lauren S Blieden
OBJECTIVE: To evaluate the sensitivity and specificity of computed tomography (CT) diagnosis of open globes; determine which imaging factors are most predictive of open globe injuries; and evaluate the agreement between neuroradiologist and ophthalmologist readers for diagnosis of open and closed globes. METHODS: This study was a retrospective cohort study. Patients who presented to Memorial Hermann-Texas Medical Center with suspicion for open globes were reviewed...
June 29, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
https://www.readbyqxmd.com/read/28660110/assessing-foraminal-stenosis-in-the-cervical-spine-a-comparison-of-three-dimensional-computed-tomographic-surface-reconstruction-to-two-dimensional-modalities
#20
Adam Schell, John M Rhee, John Holbrook, Eric Lenehan, Kun Young Park
STUDY DESIGN: Retrospective radiographic study. OBJECTIVE: The optimal radiographic modality for assessing cervical foraminal stenosis is unclear. Determination on conventional axial cuts is made difficult due in part to the complex, oblique orientation of the cervical neuroforamen. The utility of 3-dimensonal (3D) computed tomography (CT) reconstruction in improving neuroforaminal assessment is not well understood. The objective of this study is to determine inter-rater variability in grading cervical foraminal stenosis using 3 different CT imaging modalities: 3D CT surface reconstructions (3DSR), 2D sagittal oblique multiplanar reformations (2D-SOMPR), and conventional 2D axial CT imaging...
May 2017: Global Spine Journal
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