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

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https://www.readbyqxmd.com/read/28574665/simultaneous-multislice-based-5-minute-lumbar-spine-mri-protocol-initial-experience-in-a-clinical-setting
#1
Maria G Longo, Joana Fagundes, Susie Huang, William Mehan, Thomas Witzel, Himanshu Bhat, Keith Heberlein, Bruce R Rosen, Daniel Rosenthal, Ramon G Gonzalez, Pamela W Schaefer, Otto Rapalino
BACKGROUND AND PURPOSE: Previous studies have used parallel imaging (PI) techniques to decrease spine magnetic resonance imaging (MRI) protocol acquisition times. Recently developed MRI sequences allow even faster acquisitions. Our purpose was to develop a lumbar spine MRI protocol using PI with GRAPPA (generalized autocalibrating partially parallel acquisition) and a simultaneous multislice (SMS)-based sequence and to evaluate its diagnostic performance compared to a standard lumbar spine MRI protocol...
June 2, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28574627/ct-versus-mr-techniques-in-the-detection-of-cervical-artery-dissection
#2
Uta Hanning, Peter B Sporns, Meilin Schmiedel, Erich B Ringelstein, Walter Heindel, Heinz Wiendl, Thomas Niederstadt, Ralf Dittrich
BACKGROUND: Spontaneous cervical artery dissection (sCAD) is an important etiology of juvenile stroke. The gold standard for the diagnosis of sCAD is convential angiography. However, magnetic resonance imaging (MRI)/MR angiography (MRA) and computed tomography (CT)/CT angiography (CTA) are frequently used alternatives. New developments such as multislice CT/CTA have enabled routine acquisition of thinner sections with rapid imaging times. The goal of this study was to compare the capability of recent developed 128-slice CT/CTA to MRI/MRA to detect radiologic features of sCAD...
June 2, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28569398/sodium-mri-of-t1-high-signal-intensity-in-the-dentate-nucleus-due-to-gadolinium-deposition-in-multiple-sclerosis
#3
Philipp Eisele, Simon Konstandin, Kristina Szabo, Melissa Ong, Frank Zöllner, Lothar R Schad, Stefan O Schoenberg, Achim Gass
BACKGROUND AND PURPOSE: Recently, several studies reported increased signal intensity (SI) of the dentate nucleus (DN) on unenhanced T1-weighted magnetic resonance imaging (MRI) as a possible consequence of multiple applications of gadolinium-based contrast agents. The aim of this study was to investigate with sodium ((23) Na) MRI possible tissue abnormalities of the DN in multiple sclerosis (MS) patients. METHODS: Sodium and conventional MRI were performed on a clinical 3T scanner...
June 1, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28543774/spectral-signal-density-of-carotid-plaque-using-dual-energy-computed-tomography
#4
Exequiel Reynoso, Gastón A Rodriguez-Granillo, Carlos Capunay, Alejandro Deviggiano, Francisco Meli, Patricia Carrascosa
BACKGROUND AND PURPOSE: Plaque characterization using virtual monochromatic imaging derived from dual-energy computed tomography (CT) angiography requires the determination of normal signal density values of each plaque component. We sought to explore the signal density values of carotid plaque components using dual-energy compared to conventional single-energy CT angiography (CTA), and to establish the energy level with the largest differences between plaque components. METHODS: The present prospective study involved consecutive patients referred for carotid artery evaluation by CTA...
May 25, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28524459/prognostic-role-of-conventional-and-dynamic-contrast-enhanced-mri-in-optic-pathway-gliomas
#5
Nutchawan Jittapiromsak, Ping Hou, Ho-Ling Liu, Jia Sun, John M Slopis, T Linda Chi
BACKGROUND AND PURPOSE: The natural history of optic pathway glioma (OPG) is highly variable and unpredictable. We present a pilot study of the prognostic role of conventional and dynamic contrast-enhanced magnetic resonance imaging (DCE MRI) in the evaluation of OPG. METHODS: We retrospectively reviewed 17 patients with 20 pretreatment OPG lesions who underwent conventional and DCE MRI between January 2010 and December 2016. Conventional MRI was evaluated for enhancement pattern, cystic component, optic nerve tortuosity, optic nerve dural ectasia, and optic nerve perineural thickening...
May 19, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28524416/diagnostic-ultrasound-of-the-vagus-nerve-in-patients-with-diabetes
#6
Eman A Tawfik, Francis O Walker, Michael S Cartwright, Rana A El-Hilaly
BACKGROUND AND PURPOSE: Autonomic neuropathy is a serious and common complication of diabetes mellitus. The vagus nerve is the longest autonomic nerve, and may be affected in diabetes as a part of generalized neuropathy. Our objective was to assess for possible sonographic changes of the vagus nerve in diabetic patients. METHODS: The vagus nerve was bilaterally scanned in 20 healthy volunteers and 54 patients with diabetes in the axial plane at the lateral neck...
May 19, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28514045/contrast-extravasation-versus-hemorrhage-after-thrombectomy-in-patients-with-acute-stroke
#7
Vivek Yedavalli, Steffen Sammet
BACKGROUND AND PURPOSE: Intra-arterial recanalization postprocedural imaging in stroke patients can result in diagnostic complications due to hyperdensities on noncontrast computed tomography (CT), which may represent either contrast extravasation or intracranial hemorrhage. If these lesions are hemorrhage, then they are risk factors becoming symptomatic, which, if not distinguished, can alter clinical management. We investigate the effects of iodinated contrast on postprocedural magnetic resonance imaging (MRI) and prevalence of equivocal imaging interpretations of postprocedural extravasated contrast versus hemorrhage while identifying protocol pitfalls...
May 17, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28488811/resolution-of-occlusive-carotid-artery-thrombus-treated-with-anticoagulation-as-demonstrated-on-duplex-ultrasonography
#8
Laura Stein, John W Liang, Jesse Weinberger
BACKGROUND AND PURPOSE: While the majority of cerebral ischemic events due to carotid occlusive disease result from atherosclerotic plaque rupture, intraluminal carotid artery thrombus occasionally occurs in patients without preexisting carotid atherosclerosis. Identification of nonatherosclerotic thrombus as the cause of the carotid occlusive disease can obviate the need for an interventional procedure, and resolution of thrombus can be monitored with B-mode duplex ultrasonography. METHODS: We reviewed 3 patients treated on The Mount Sinai Hospital Stroke Unit with anticoagulation for nonatherosclerotic carotid thrombi and followed with serial Doppler ultrasonogrpahy for resolution of thrombus...
May 10, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28488804/three-dimensional-shape-and-surface-features-distinguish-multiple-sclerosis-lesions-from-nonspecific-white-matter-disease
#9
Braeden D Newton, Katy Wright, Mandy D Winkler, Francesca Bovis, Masaya Takahashi, Ivan E Dimitrov, Maria Pia Sormani, Marco C Pinho, Darin T Okuda
BACKGROUND AND PURPOSE: There remains a need to further refine the ability of clinicians to differentiate multiple sclerosis (MS) from other disease etiologies. Here, we illustrate the value of 3-dimensional (3D) geometric shape and surface lesion characteristics between disease states. METHODS: Standardized 3-Tesla 3D brain magnetic resonance imaging studies were performed on enrolled MS and nonspecific white matter (NSWM) patients. Focal supratentorial lesions were identified, reconstructed using maximum intensity projection, manually segmented, and 3D printed...
May 10, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28464417/a-novel-semiautomated-pipeline-to-measure-brain-atrophy-and-lesion-burden-in-multiple-sclerosis-a-long-term-comparative-study
#10
Tomas Uher, Jan Krasensky, Manuela Vaneckova, Lukas Sobisek, Zdenek Seidl, Eva Havrdova, Niels Bergsland, Michael G Dwyer, Dana Horakova, Robert Zivadinov
BACKGROUND AND PURPOSE: Lesion burden and brain volume changes are frequent end points in research but nowadays are becoming important in the clinical practice of multiple sclerosis (MS). The objective of this study was to investigate the correlation between magnetic resonance imaging (MRI) measures obtained by in-house developed ScanView software and commonly used volumetric techniques for assessment of T2 lesion and whole brain volumes and their changes. METHODS: Together 3,340 MRI scans from 209 patients after first demyelinating event suggestive of MS, 181 relapsing-remitting MS patients and 43 controls were analyzed...
May 2, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28464368/leptomeningeal-enhancement-at-7t-in-multiple-sclerosis-frequency-morphology-and-relationship-to-cortical-volume
#11
Daniel M Harrison, Kevin Y Wang, Julie Fiol, Kerry Naunton, Walter Royal, Jun Hua, Izlem Izbudak
BACKGROUND AND PURPOSE: Perform an investigation of the frequency and distribution of leptomeningeal enhancement on postgadolinium magnetization-prepared FLAIR (MPFLAIR) in multiple sclerosis (MS) on 7 Tesla (7T) MRI and to relate this finding to measures of brain structure and lesion volumes. METHODS: Twenty-nine participants with MS underwent 7T MRI of the brain. Three healthy volunteers (HVs) were scanned for comparison. Areas of postcontrast leptomeningeal enhancement were identified...
May 2, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28426143/coronal-transcranial-sonography-and-m-mode-tremor-frequency-determination-in-parkinson-s-disease-and-essential-tremor
#12
Daniel Richter, Dirk Woitalla, Siegfried Muhlack, Ralf Gold, Lars Tönges, Christos Krogias
BACKGROUND AND PURPOSE: The axial mesencephalic transcranial sonography plane is an established and sensitive diagnostic tool for the differentiation of Parkinson's disease and essential tremor. However, the substantia nigra can also be depicted in a second coronal examination plane, whose diagnostic value has not yet been evaluated. Furthermore, the M-mode tremor frequency determination represents another sonographic tool, which might yield additional diagnostic value. METHODS: We included patients with diagnosed Parkinson's disease (n = 31), essential tremor (n = 16), and healthy age-matched controls (n = 16)...
April 20, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28419634/contrast-enhanced-ultrasound-and-elastography-imaging-of-the-neonatal-brain-a-review
#13
REVIEW
Christopher Bailey, Thierry A G M Huisman, Robert M de Jong, Misun Hwang
Neonates presenting with neurologic symptoms require rapid, noninvasive imaging with high spatial resolution and tissue contrast. Magnetic resonance imaging (MRI) is currently the most sensitive and specific imaging modality for evaluation of neurological pathology. This modality does come with several challenges in the neonatal population, namely, the need to transport a possibly critically sick neonate to the MRI suite and the necessity of the neonate to remain still for a significant length of time, occasionally requiring sedation...
April 17, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28414895/the-impact-of-ct-perfusion-threshold-on-predicted-viable-and-nonviable-tissue-volumes-in-acute-ischemic-stroke
#14
Xuya Huang, Dheeraj Kalladka, Bharath Kumar Cheripelli, Fiona Catherine Moreton, Keith W Muir
BACKGROUND AND PURPOSE: Perfusion imaging is used for patient selection in clinical practice and trials. Postprocessing and definitions of tissue viability are nevertheless not standardized. We compared the lesion volumes generated with two well-recognized perfusion tissue definitions in a single-center phase 2 thrombolysis study. METHODS: We analyzed perfusion imaging data from the Alteplase-Tenecteplase Trial Evaluation for Stroke Thrombolysis (ATTEST) study using two popular tissue viability thresholds (ischemic core definition: (1) cerebral blood volume < 2...
April 17, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28370651/tracking-the-evolution-of-cerebral-gadolinium-enhancing-lesions-to-persistent-t1-black-holes-in-multiple-sclerosis-validation-of-a-semiautomated-pipeline
#15
Simon Andermatt, Athina Papadopoulou, Ernst-Wilhelm Radue, Till Sprenger, Philippe Cattin
BACKGROUND: Some gadolinium-enhancing multiple sclerosis (MS) lesions remain T1-hypointense over months ("persistent black holes, BHs") and represent areas of pronounced tissue loss. A reduced conversion of enhancing lesions to persistent BHs could suggest a favorable effect of a medication on tissue repair. However, the individual tracking of enhancing lesions can be very time-consuming in large clinical trials. PURPOSE: We created a semiautomated workflow for tracking the evolution of individual MS lesions, to calculate the proportion of enhancing lesions becoming persistent BHs at follow-up...
March 30, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28371088/cerebral-gray-matter-atrophy-is-associated-with-the-csf-igg-index-in-african-american-with-multiple-sclerosis
#16
Navid Seraji-Bozorgzad, Omar Khan, Bruce A C Cree, Fen Bao, Christina Caon, Imad Zak, Sara Razmjou, Alexandros Tselis, Scott Millis, Evanthia Bernitsas
BACKGROUND AND PURPOSE: African American (AA) patients with multiple sclerosis (MS) have been reported to have a more aggressive disease course compared to their white counterparts. We explored the relation of gray matter (GM) volume, a marker of tissue injury, and cerebrospinal fluid (CSF) IgG index in both AA and white MS patients. METHODS: This was a cross-sectional study of 150 self-identified AA and 150 white patients with MS who underwent magnetic resonance imaging scan of brain and CSF sampling...
March 29, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28370739/imaging-of-laser-therapy-in-epilepsy
#17
Lidia M Nagae, Justin M Honce, Eric Nyberg, Steven Ojemann, Aviva Abosch, Cornelia N Drees
BACKGROUND AND PURPOSE: MR-guided laser interstitial thermal therapy (MRgLITT) is an increasingly popular neuroablative method for the surgical treatment of epilepsy patients. This article intends to demonstrate the utility and pitfalls of imaging in the context of patient care with MRgLITT. MATERIAL AND METHODS: A retrospective review of the medical records and imaging database with six illustrative cases selected to demonstrate the use of imaging throughout patient management with MRgLITT in diverse clinical situations and pathologies...
May 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
#18
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...
May 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28072502/wallerian-degeneration-beyond-the-corticospinal-tracts-conventional-and-advanced-mri-findings
#19
REVIEW
Yin Jie Chen, Seyed Ali Nabavizadeh, Arastoo Vossough, Sunil Kumar, Laurie A Loevner, Suyash Mohan
Wallerian degeneration (WD) is defined as progressive anterograde disintegration of axons and accompanying demyelination after an injury to the proximal axon or cell body. Since the 1980s and 1990s, conventional magnetic resonance imaging (MRI) sequences have been shown to be sensitive to changes of WD in the subacute to chronic phases. More recently, advanced MRI techniques, such as diffusion-weighted imaging (DWI) and diffusion tensor imaging (DTI), have demonstrated some of earliest changes attributed to acute WD, typically on the order of days...
May 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
#20
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.
May 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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