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

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https://www.readbyqxmd.com/read/28318128/proton-mr-spectroscopy-in-patients-with-nonlesional-insular-cortex-epilepsy-confirmed-by-invasive-eeg-recordings
#1
Yasmine Aitouche, Steve A Gibbs, Guillaume Gilbert, Olivier Boucher, Alain Bouthillier, Dang Khoa Nguyen
BACKGROUND AND PURPOSE: Recent studies suggest that a nonnegligible proportion of drug-resistant epilepsy surgery candidates have an epileptogenic zone that involves the insula. We aimed to examine the value of proton magnetic resonance spectroscopy ((1) H-MRS) in identifying patients with insular cortex epilepsy. METHODS: Patients with possible nonlesional drug-refractory insular epilepsy underwent a voxel-based (1) H-MRS study prior to an intracranial electroencephalographic (EEG) study...
March 20, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28276591/postprocedure-subarachnoid-hemorrhage-after-endovascular-treatment-for-acute-ischemic-stroke
#2
Adnan I Qureshi, Muhammad A Saleem, Emrah Aytac
BACKGROUND: The rate of occurrence and associated outcomes of subarachnoid hemorrhage (SAH) in acute ischemic stroke patients following endovascular treatment is not well studied. METHODS: We analyzed data from subjects treated with intravenous recombinant tissue plasminogen activator followed by endovascular treatment in the Interventional Management of Stroke III trial. The baseline and 24 (±6) hours postrandomization computed tomographic scans were interpreted centrally for presence, type, and location of intracranial hemorrhages (ICHs) including SAH...
March 9, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28276103/vertebral-artery-diameter-and-flow-nature-or-nurture
#3
Adam Domonkos Tarnoki, Bence Fejer, David Laszlo Tarnoki, Levente Littvay, Pierleone Lucatelli, Carlo Cirelli, Fabrizio Fanelli, Beatrice Sacconi, Corrado Fagnani, Emanuela Medda, Filippo Farina, Giorgio Meneghetti, Tamas Horvath, Giacomo Pucci, Giuseppe Schillaci, Maria Antonietta Stazi, Claudio Baracchini
BACKGROUND AND PURPOSE: In contrast with the carotid arteries, the vertebral arteries (VAs) show considerable variation in length, caliber, and vessel course. This study investigated whether the variation in diameter and flow characteristics of the VAs might be inherited. METHODS: A total of 172 Italian twins from Padua, Perugia, and Terni (54 monozygotic, 32 dizygotic) recruited from the Italian Twin Registry underwent B-mode and pulsed-wave Doppler ultrasound assessment of their VAs...
March 9, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28266747/spatial-coregistration-of-functional-near-infrared-spectroscopy-to-brain-mri
#4
Michelle Chen, Helena M Blumen, Meltem Izzetoglu, Roee Holtzer
BACKGROUND AND PURPOSE: Traditional neuroimaging techniques restrict movement and make it difficult to study the processes that require oral, upper limb, or lower limb motor execution. Functional near-infrared spectroscopy (fNIRS) is an optical neuroimaging modality that measures brain oxygenation and permits movement during data acquisition. A key limitation of fNIRS, however, is the lack of a standard method to coregister quantitative fNIRS measurements to structural images such as magnetic resonance imaging (MRI)...
March 7, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28261936/characterizing-clinical-and-mri-dissociation-in-patients-with-multiple-sclerosis
#5
Brian C Healy, Guy J Buckle, Eman N Ali, Svetlana Egorova, Fariha Khalid, Shahamat Tauhid, Bonnie I Glanz, Tanuja Chitnis, Charles R G Guttmann, Howard L Weiner, Rohit Bakshi
BACKGROUND AND PURPOSE: Two common approaches for measuring disease severity in multiple sclerosis (MS) are the clinical exam and brain magnetic resonance imaging (MRI) scan. Although most patients show similar disease severity on both measures, some patients have clinical/MRI dissociation. METHODS: Subjects from a comprehensive care MS center who had a concurrent brain MRI, spinal cord MRI, clinical examination, and patient reported outcomes were classified into three groups based on the Expanded Disability Status Scale (EDSS) and cerebral T2 hyperintense lesion volume (T2LV)...
March 6, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28207200/a-pet-guided-framework-supports-a-multiple-arterial-input-functions-approach-in-dsc-mri-in-acute-stroke
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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/27541694/applications-of-ultrasound-in-the-resection-of-brain-tumors
#16
REVIEW
Rahul Sastry, Wenya Linda Bi, Steve Pieper, Sarah Frisken, Tina Kapur, William Wells, Alexandra J Golby
Neurosurgery makes use of preoperative imaging to visualize pathology, inform surgical planning, and evaluate the safety of selected approaches. The utility of preoperative imaging for neuronavigation, however, is diminished by the well-characterized phenomenon of brain shift, in which the brain deforms intraoperatively as a result of craniotomy, swelling, gravity, tumor resection, cerebrospinal fluid (CSF) drainage, and many other factors. As such, there is a need for updated intraoperative information that accurately reflects intraoperative conditions...
January 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27541485/limbic-pathway-correlates-of-cognitive-impairment-in-multiple-sclerosis
#17
Zafer Keser, Khader M Hasan, Benson Mwangi, Refaat E Gabr, Joel L Steinberg, Jeffrey Wilken, Jerry S Wolinsky, Flavia M Nelson
BACKGROUND AND PURPOSE: Distinct injuries to various limbic white matter pathways have been reported to be associated with different aspects of cognitive dysfunction in multiple sclerosis (MS). Diffusion tensor imaging (DTI) offers a noninvasive method to map tissue microstructural organization. We utilized quantitative magnetic resonance imaging methods to analyze the main limbic system-white matter structures in MS patients with cognitive impairment (CI). METHODS: Ten cognitively nonimpaired MS (MSNI) patients and 36 patients with diagnosed CI (MSCI) underwent the minimal assessment of Cognitive Function in MS (MACFIMS) battery...
January 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27466943/the-effect-of-glatiramer-acetate-on-spinal-cord-volume-in-relapsing-remitting-multiple-sclerosis
#18
Tarun Singhal, Shahamat Tauhid, Shelley Hurwitz, Mohit Neema, Rohit Bakshi
BACKGROUND: Spinal cord atrophy occurs early in the multiple sclerosis (MS) disease course, is closely related to physical disability, and is a putative neuroprotective therapeutic outcome measure. OBJECTIVE: This pilot study explored glatiramer acetate (GA)'s effect on spinal cord volume in patients with relapsing-remitting MS (RRMS). METHODS: Fifteen patients receiving daily subcutaneous GA were prospectively followed. At baseline, age was 43...
January 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27300498/utilization-of-emergent-neuroimaging-for-thrombolysis-eligible-stroke-patients
#19
Nerses Sanossian, Katherine A Fu, David S Liebeskind, Sidney Starkman, Scott Hamilton, J Pablo Villablanca, Adrian M Burgos, Robin Conwit, Jeffrey L Saver
BACKGROUND: Advances in diagnostic imaging of stroke include multimodal techniques such as noninvasive angiography and perfusion imaging. We aimed to characterize trends in neuroimaging utilization among acute stroke patients. Utilization of multimodal imaging for acute stroke in the community has remained largely uncharacterized despite its increased adoption at academic medical centers. METHODS: We quantified neuroimaging utilization in the emergency department (ED) for 1,700 hyperacute stroke patients presenting <2 hours after symptom onset who participated in the National Institutes of Health Field Administration of Stroke Therapy-Magnesium (FAST-MAG) study throughout Los Angeles and Orange Counties...
January 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/27300318/the-central-vein-sign-in-multiple-sclerosis-lesions-is-present-irrespective-of-the-t2-sequence-at-3-t
#20
Amal P R Samaraweera, Margareta A Clarke, Amy Whitehead, Yasser Falah, Ian D Driver, Robert A Dineen, Paul S Morgan, Nikos Evangelou
BACKGROUND AND PURPOSE: Previous T2*-weighted magnetic resonance imaging (MRI) studies have used white matter lesion (WML) central veins to distinguish multiple sclerosis (MS) from its mimics. To be clinically applicable, the "central vein sign" needs to be detectable across different T2* sequences. Our objective was to determine if the central vein sign is reliably present in MS and absent in patients with ischemic small vessel disease (SVD) across different T2* sequences at 3T MRI. METHODS: Ten patients with MS and 10 with SVD were each scanned on a 3 T Philips and GE scanner...
January 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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