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Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging

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https://www.readbyqxmd.com/read/28207200/a-pet-guided-framework-supports-a-multiple-arterial-input-functions-approach-in-dsc-mri-in-acute-stroke
#1
Michelle Livne, Vince I Madai, Peter Brunecker, Olivier Zaro-Weber, Walter Moeller-Hartmann, Wolf-Dieter Heiss, Kim Mouridsen, Jan Sobesky
BACKGROUND AND PURPOSE: In acute stroke, arterial-input-function (AIF) determination is essential for obtaining perfusion estimates with dynamic susceptibility-weighted contrast-enhanced magnetic resonance imaging (DSC-MRI). Standard DSC-MRI postprocessing applies single AIF selection, ie, global AIF. Physiological considerations, however, suggest that a multiple AIFs selection method would improve perfusion estimates to detect penumbral flow. In this study, we developed a framework based on comparable DSC-MRI and positron emission tomography (PET) images to compare the two AIF selection approaches and assess their performance in penumbral flow detection in acute stroke...
February 16, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28195441/imaging-of-the-vasa-nervorum-using-contrast-enhanced-ultrasound
#2
Adnan I Qureshi, Muhammad A Saleem, Asad Ahrar, Faisal Raja
INTRODUCTION: We describe the use of intravenous contrast-enhanced ultrasonography to study vasa nervorum using contrast-enhanced ultrasound. METHODS: We imaged the median, femoral, or sciatic nerves in 4 patients in longitudinal plane using high-resolution ultrasound after intravenous bolus of activated Perflutren lipid microspheres. The images were acquired as photopic images (in brown color) in real time using 2-dimensional B-Flow mode scan within a selected region of interest...
February 14, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28194831/comparing-two-processing-pipelines-to-measure-subcortical-and-cortical-volumes-in-patients-with-and-without-mild-traumatic-brain-injury
#3
Matthew W Reid, Nathan P Hannemann, Gerald E York, John L Ritter, Jonathan A Kini, Jeffrey D Lewis, Paul M Sherman, Carmen S Velez, Ann Marie Drennon, Jacob D Bolzenius, David F Tate
PURPOSE: To compare volumetric results from NeuroQuant® and FreeSurfer in a service member setting. Since the advent of medical imaging, quantification of brain anatomy has been a major research and clinical effort. Rapid advancement of methods to automate quantification and to deploy this information into clinical practice has surfaced in recent years. NeuroQuant® is one such tool that has recently been used in clinical settings. Accurate volumetric data are useful in many clinical indications; therefore, it is important to assess the intermethod reliability and concurrent validity of similar volume quantifying tools...
February 14, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28170136/intracranial-posterior-circulation-large-artery-thrombi-visualized-using-susceptibility-weighted-mri
#4
Naidong Wang, Qimin Hu, Qiaoshu Wang, Jinglong Zhao, Nikita Dedhia, Louis R Caplan
PURPOSE: To identify thrombi in patients with posterior circulation large artery occlusion using susceptibility-weighted magnetic resonance imaging (MRI). METHODS: All patients hospitalized with intracranial posterior circulation occlusion from January 2003 to September 2013 were included. MRI and computed tomography angiography were reviewed to determine the presence of arterial occlusion and identify thrombi. Eighty-one patients were analyzed to investigate susceptibility vessel sign (SVS) that was identified as blooming artifact (BA) on T2*-weighted gradient echo imaging...
February 7, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28140499/deterministic-tractography-of-the-descending-tract-of-the-spinal-trigeminal-nerve-using-diffusion-tensor-imaging
#5
Daniel J Burkett, Jonathan R Garst, Jacquelyn P Hill, Anthony Kam, Douglas E Anderson
BACKGROUND AND PURPOSE: Pain information from the face enters the pons via the trigeminal nerve before creating an anatomical "elbow" that turns caudally into the spinal trigeminal tract (SpTV). Visualization of the descending tract of the trigeminal nerve as it begins its descent from the nerve root entry zone (NREZ) in the pons would improve the accuracy of current procedures aimed at altering or lesioning the trigeminal nerve within the brainstem. The focus of this study was to develop a standardized protocol using diffusion tensor imaging (DTI) and deterministic tractography methods to image the SpTV...
January 31, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28140493/cerebral-high-intensity-transient-signals-during-pediatric-cardiac-catheterization-a-pilot-study-using-transcranial-doppler-ultrasonography
#6
Kerri L LaRovere, Kush Kapur, Doff B McElhinney, Alexander Razumovsky, Barry D Kussman
BACKGROUND AND PURPOSE: Cerebral emboli are one potential cause of acute brain injury in children with congenital heart disease (CHD) undergoing cardiac catheterization. In this pilot study using transcranial Doppler (TCD) ultrasonography, we sought to evaluate the incidence, burden, and circumstances of cerebral high-intensity transient signals (HITS), presumably representing emboli, during pediatric cardiac catheterization. METHODS: Emboli monitoring of the right middle cerebral artery was performed in five children...
January 31, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28102639/validation-of-an-mri-rating-scale-for-amyloid-related-imaging-abnormalities
#7
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
https://www.readbyqxmd.com/read/28098958/perilesional-hyperintensity-on-t1-weighted-images-in-intra-axial-brain-masses-other-than-cavernous-malformations
#8
S Ali Nabavizadeh, Dasha Pechersky, J Eric Schmitt, MacLean Nasrallah, Ronald Wolf, Laurie Loevner, Alexander C Mamourian
BACKGROUND AND PURPOSE: Hyperintensity on T1-weighted imaging in perilesional vasogenic edema has been reported as a useful sign for differentiating cavernous malformation from other hemorrhagic intra-axial masses. In this study, we investigated the frequency of perilesional hyperintensity on T1-weighted imaging in patients with intra-axial hemorrhagic and nonhemorrhagic brain masses. METHODS: The study was performed with the approval of the institutional review board...
January 18, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28066971/the-association-between-diffusion-mri-defined-infarct-volume-and-nihss-score-in-patients-with-minor-acute-stroke
#9
Shadi Yaghi, Charlotte Herber, Amelia K Boehme, Howard Andrews, Joshua Z Willey, Sara K Rostanski, Matthew Siket, Mahesh V Jayaraman, Ryan A McTaggart, Karen L Furie, Randolph S Marshall, Ronald M Lazar, Bernadette Boden-Albala
BACKGROUND: Prior studies have shown a correlation between the National Institutes of Health Stroke Scale (NIHSS) and stroke volume on diffusion weighted imaging (DWI); data are more limited in patients with minor stroke. We sought to determine the association between DWI lesion(s) volume and the (1) total NIHSS score and (2) NIHSS component scores in patients with minor stroke. METHODS: We included all patients with minor stroke (NIHSS 0-5) enrolled in the Stroke Warning Information and Faster Treatment study...
January 9, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28054736/bilateral-hippocampal-restricted-diffusion-same-picture-many-causes
#10
Shamik Bhattacharyya, Taha Gholipour, Rene A Colorado, Joshua P Klein
With some regularity, we have encountered the unusual imaging abnormality of bilateral hippocampal restricted diffusion, either in isolation or in combination with other coincident abnormalities. In this retrospective case series, we examine clinical and imaging data to explore potential etiologies and clinical implications of this imaging finding. Sixteen cases with the imaging abnormality are presented, with etiologies including hypoxemia, hypoxemia-ischemia, and seizures.
January 5, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28029187/off-label-uses-for-flow-diversion-in-intracranial-aneurysm-management
#11
Fawaz Al-Mufti, Krishna Amuluru, Gomez Francisco, Vincent Dodson, Mohammad El-Ghanem, Charles J Prestigiacomo, Chirag D Gandhi
Treatment of complex aneurysms using microsurgical and other conventional neuroendovascular techniques remains challenging. As a result, stent- and balloon-assisted coiling are instead performed to treat morphologically complex aneurysms, which include giant, wide-necked, and fusiform aneurysms. While these techniques have had success in treating these complex aneurysms, recanalization rates associated with these techniques are still problematic. In the constant effort to improve the outcome of complex aneurysm treatment, flow-diverting stents (FDSs) have emerged in recent years as the preferred treatment...
December 28, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28000975/hypointense-vessels-detected-by-susceptibility-weighted-imaging-identifies-tissue-at-risk-of-infarction-in-anterior-circulation-stroke
#12
Bastian Cheng, Nikolaus Schröder, Nils Daniel Forkert, Peter Ludewig, André Kemmling, Tim Magnus, Jens Fiehler, Christian Gerloff, Götz Thomalla
BACKGROUND AND PURPOSE: The diagnostic value of susceptibility-weighted magnetic resonance imaging of acute stroke patients has shown potential as a surrogate marker of impaired hemodynamics. We investigate the value of asymmetrical hypointense cerebral vessels (HV) for the identification of vessel status and tissue at risk of infarction (TaR). METHODS: Symmetry of HV was visually rated on SWI data from a well-defined population of acute anterior circulation stroke with onset <24 hours...
December 21, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28000971/safety-and-tolerability-of-sonovue%C3%A2-in-patients-with-large-artery-anterior-circulation-acute-stroke
#13
Claudio Baracchini, Federica Viaro, Silvia Favaretto, Anna Palmieri, Caterina Kulyk, Francesco Causin, Filippo Farina, Enzo Ballotta
BACKGROUND AND PURPOSE: Ultrasound contrast agents (UCAs) are routinely used to improve the visualization of intracranial arteries. Since a higher rate of intracranial hemorrhage (ICH) has been observed in patients undergoing sonothrombolysis in combination with UCAs, we conducted this study with the aim of assessing safety and tolerability of SonoVue® in patients with acute ischemic stroke due to anterior circulation large artery occlusion (LAO) and eligible to intravenous thrombolysis and/or mechanical thrombectomy...
December 21, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28000960/neuroimaging-findings-in-pediatric-genetic-skeletal-disorders-a-review
#14
Matthias W Wagner, Andrea Poretti, Jane E Benson, Thierry A G M Huisman
Genetic skeletal disorders (GSDs) are a heterogeneous group characterized by an intrinsic abnormality in growth and (re-)modeling of cartilage and bone. A large subgroup of GSDs has additional involvement of other structures/organs beside the skeleton, such as the central nervous system (CNS). CNS abnormalities have an important role in long-term prognosis of children with GSDs and should consequently not be missed. Sensitive and specific identification of CNS lesions while evaluating a child with a GSD requires a detailed knowledge of the possible associated CNS abnormalities...
December 21, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27996178/quantitative-analysis-of-extracranial-arterial-tortuosity-in-patients-with-sickle-cell-disease
#15
Karen Buch, Rahul Arya, Bhavya Shah, Rohini N Nadgir, Naoko Saito, Muhammad M Qureshi, Osamu Sakai
PURPOSE: Compared to the intracranial vasculature in sickle cell disease (SCD) patients, the morphologic changes of the extracranial vasculature in SCD patients are less well understood. The purpose of this study was to evaluate the tortuosity of the extracranial carotid and vertebral arteries in patients with SCD compared to age-matched controls. METHODS: Following Institution Review Board approval, between January 2004 and December 2013, Magnetic resonance angiogram neck examinations were retrospectively reviewed on 56 patients with SCD and 56 age-matched controls...
December 20, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27935138/characteristics-of-accredited-transcranial-doppler-ultrasound-laboratories-in-the-united-states
#16
Mary Beth Farrell, John Y Choi, Endrit Ziu, Kevin M Cockroft
PURPOSE: The aim of this study was to describe in detail the characteristics and accreditation compliance of laboratories in the United States applying for Intersocietal Accreditation Commission (IAC) transcranial Doppler (TCD) accreditation. METHODS: This was a retrospective study of all applicant laboratories from 2012 to 2015. We used the IAC database to extract laboratory characteristics and guideline compliance metrics. RESULTS: Evaluation of 97 laboratories demonstrated that 67% were hospital-based and located in the South (43...
December 9, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27918139/an-observational-study-to-assess-brain-mri-change-and-disease-progression-in-multiple-sclerosis-clinical-practice-the-ms-mrius-study
#17
Robert Zivadinov, Nasreen Khan, Jennie Medin, Pia Christoffersen, Jennifer Price, Jonathan R Korn, Ian Bonzani, Michael G Dwyer, Niels Bergsland, Ellen Carl, Diego Silva, Bianca Weinstock-Guttman
BACKGROUND & PURPOSE: To describe methodology, interim baseline, and longitudinal magnetic resonance imaging (MRI) acquisition parameter characteristics of the multiple sclerosis clinical outcome and MRI in the United States (MS-MRIUS). MATERIAL & METHODS: The MS-MRIUS is an ongoing longitudinal and retrospective study of MS patients on fingolimod. Clinical and brain MRI image scan data were collected from 600 patients across 33 MS centers in the United States. MRI brain outcomes included change in whole-brain volume, lateral ventricle volume, T2- and T1-lesion volumes, and new/enlarging T2 and gadolinium-enhancing lesions...
December 5, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27917559/prognostic-value-of-nerve-ultrasound-and-electrophysiological-findings-in-saturday-night-palsy
#18
Antonios Kerasnoudis, Panagiota Ntasiou, Efthymia Ntasiou
BACKGROUND AND PURPOSE: We report on the prognostic role of the cross-sectional area (CSA) enlargement and conduction block (CB) in radial neuropathy (Saturday night palsy [SNP]). METHODS: Reference CSA values were defined in 30 healthy subjects. Twenty-four patients with SNP underwent evaluation (Thessaloniki Hypesthesia Score [THS], Medical Research Council [MRC], ultrasound, electrophysiology). All patients were followed up 3 months after initial presentation...
December 5, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27896893/an-acute-disseminated-encephalomyelitis-like-illness-in-the-elderly-neuroimaging-and-neuropathology-findings
#19
Ulrike W Kaunzner, Elliott Salamon, Elena Pentsova, Marc Rosenblum, Sasan Karimi, Nancy Nealon, Ehud Lavi, Dara G Jamieson
INTRODUCTION: Acute disseminated encephalomyelitis (ADEM) is a rare demyelinating disease of the central nervous system (CNS) that classically occurs in children and adolescents. It characteristically presents with acute inflammation, resulting in demyelination, often following an infectious disease. ADEM has been described in adult patients, but the incidence in the adult and especially elderly population is low. CASES: We describe five older adults (age 57 to 85) who presented with acute neurological symptoms...
November 29, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27897360/central-atrophy-early-in-multiple-sclerosis-third-ventricle-volumetry-versus-planimetry
#20
Theodor Lutz, Barbara Bellenberg, Ruth Schneider, Florian Weiler, Odo Köster, Carsten Lukas
BACKGROUND AND PURPOSE: Cerebral atrophy has been suggested to be a reliable magnetic resonance imaging (MRI) predictor of subsequent disability in all stages of multiple sclerosis (MS). However, no accepted methodology for routine clinical use exists to date. We sought an easy to apply and fast technique to evaluate cerebral ventricular volume in patients with MS with similar accuracy as a semiautomatic volumetric method. METHODS: The study included 104 patients, 61 diagnosed with MS and 43 with clinically isolated syndrome...
November 28, 2016: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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