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AJNR. American Journal of Neuroradiology

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https://www.readbyqxmd.com/read/27908871/regarding-computer-extracted-texture-features-to-distinguish-cerebral-radionecrosis-from-recurrent-brain-tumors-on-multiparametric-mri-a-feasibility-study
#1
LETTER
A D Schweitzer, G C Chiang, J Ivanidze, H Baradaran, R J Young, R D Zimmerman
No abstract text is available yet for this article.
December 1, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27908870/reply
#2
LETTER
P Tiwari, L Wolansky, A Nayate, A Madabhushi
No abstract text is available yet for this article.
December 1, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27908869/glass-half-full
#3
J S Ross
No abstract text is available yet for this article.
December 1, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27908868/benchmarking-lumbar-puncture-fluoroscopy-time-during-fellowship-training
#4
H Yang, K Schaffer, L Liu, M Mahesh, D M Yousem
We sought to establish a guide for identifying fellowship competency in performing fluoroscopically guided lumbar punctures. With a linear mixed-effects model, we compared the fluoroscopy time between the first and last 3 months of neuroradiology training. During 7 years, 55 fellows performed 1142 and 861 lumbar punctures in the first and last quarters of training. A target fluoroscopy time of 0.26 minutes, the upper 95% confidence interval, can serve as a fellowship benchmark for successfully achieving competence in fluoroscopically guided lumbar punctures...
December 1, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884881/testing-stenting-and-flow-diversion-using-a-surgical-elastase-induced-complex-fusiform-aneurysm-model
#5
R Fahed, T E Darsaut, I Salazkin, J-C Gentric, M Mazighi, J Raymond
BACKGROUND AND PURPOSE: Rabbit elastase-induced saccular aneurysms have been commonly used for preclinical testing of endovascular devices, including flow diverters. However, all tested devices have been shown to be capable of aneurysm occlusion with this model. We aimed to create a more challenging model to test and discriminate among neurovascular devices of varying efficacies. MATERIALS AND METHODS: With a surgical approach that included elastase infusion and balloon dilation, we attempted the creation of complex fusiform aneurysms in 16 rabbits, with standard saccular carotid aneurysms created in 15 other animals...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884880/first-pass-contrast-enhanced-mra-for-pretherapeutic-diagnosis-of-spinal-epidural-arteriovenous-fistulas-with-intradural-venous-reflux
#6
S Mathur, S P Symons, T J Huynh, P Muthusami, W Montanera, A Bharatha
BACKGROUND AND PURPOSE: Spinal epidural AVFs are rare spinal vascular malformations. When there is associated intradural venous reflux, they may mimic the more common spinal dural AVFs. Correct diagnosis and localization before conventional angiography is beneficial to facilitate treatment. We hypothesize that first-pass contrast-enhanced MRA can diagnose and localize spinal epidural AVFs with intradural venous reflux and distinguish them from other spinal AVFs. MATERIALS AND METHODS: Forty-two consecutive patients with a clinical and/or radiologic suspicion of spinal AVF underwent MR imaging, first-pass contrast-enhanced MRA, and DSA at a single institute (2000-2015)...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884879/henry-j-m-barnett
#7
A J Fox
No abstract text is available yet for this article.
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884878/comparison-of-3-different-types-of-spinal-arteriovenous-shunts-below-the-conus-in-clinical-presentation-radiologic-findings-and-outcomes
#8
T Hong, J E Park, F Ling, K G terBrugge, M Tymianski, H Q Zhang, T Krings
BACKGROUND AND PURPOSE: Spinal arteriovenous shunts below the conus constitute 3 types of lesions, which have previously been mainly described in case reports, given their rarity, and are sometimes misdiagnosed. The purpose of this study was to describe the features of each type and compare these types as to epidemiologic features, clinical and radiologic presentations, treatment, and outcomes in a consecutive series of 48 cases. MATERIALS AND METHODS: The prospectively collected data bases of 2 referral centers for spinal vascular lesions were retrospectively reviewed...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884877/associations-between-measures-of-structural-morphometry-and-sensorimotor-performance-in-individuals-with-nonspecific-low-back-pain
#9
K Caeyenberghs, M Pijnenburg, N Goossens, L Janssens, S Brumagne
BACKGROUND AND PURPOSE: To date, most structural brain imaging studies in individuals with nonspecific low back pain have evaluated volumetric changes. These alterations are particularly found in sensorimotor-related areas. Although it is suggested that specific measures, such as cortical surface area and cortical thickness, reflect different underlying neural architectures, the literature regarding these different measures in individuals with nonspecific low back pain is limited. Therefore, the current study was designed to investigate the association between the performance on a sensorimotor task, more specifically the sit-to-stand-to-sit task, and cortical surface area and cortical thickness in individuals with nonspecific low back pain and healthy controls...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27884876/measurement-of-cortical-thickness-and-volume-of-subcortical-structures-in-multiple-sclerosis-agreement-between-2d-spin-echo-and-3d-mprage-t1-weighted-images
#10
A Vidal-Jordana, D Pareto, J Sastre-Garriga, C Auger, E Ciampi, X Montalban, A Rovira
BACKGROUND AND PURPOSE: Gray matter pathology is known to occur in multiple sclerosis and is related to disease outcomes. FreeSurfer and the FMRIB Integrated Registration and Segmentation Tool (FIRST) have been developed for measuring cortical and subcortical gray matter in 3D-gradient-echo T1-weighted images. Unfortunately, most historical MS cohorts do not have 3D-gradient-echo, but 2D-spin-echo images instead. We aimed to evaluate whether cortical thickness and the volume of subcortical structures measured with FreeSurfer and FIRST could be reliably measured in 2D-spin-echo images and to investigate the strength and direction of clinicoradiologic correlations...
November 24, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856441/survey-of-head-and-neck-practice
#11
LETTER
D M Yousem
No abstract text is available yet for this article.
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856440/reply
#12
LETTER
Y Anzai
No abstract text is available yet for this article.
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856439/early-stage-glioblastomas-mr-imaging-based-classification-and-imaging-evidence-of-progressive-growth
#13
C H Toh, M Castillo
BACKGROUND AND PURPOSE: The serial imaging changes describing the growth of glioblastomas from small to large tumors are seldom reported. Our aim was to classify the imaging patterns of early-stage glioblastomas and to define the order of appearance of different imaging patterns that occur during the growth of small glioblastomas. MATERIALS AND METHODS: Medical records and preoperative MR imaging studies of patients diagnosed with glioblastoma between 2006 and 2013 were reviewed...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856438/genetics-of-von-hippel-lindau-disease
#14
D C Dwyer, R K Tu
No abstract text is available yet for this article.
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856437/quantifying-intracranial-plaque-permeability-with-dynamic-contrast-enhanced-mri-a-pilot-study
#15
P Vakil, A H Elmokadem, F H Syed, C G Cantrell, F H Dehkordi, T J Carroll, S A Ansari
BACKGROUND AND PURPOSE: Intracranial atherosclerotic disease plaque hyperintensity and/or gadolinium contrast enhancement have been studied as imaging biomarkers of acutely symptomatic ischemic presentations using single static MR imaging measurements. However, the value in modeling the dynamics of intracranial plaque permeability has yet to be evaluated. The purpose of this study was to use dynamic contrast-enhanced MR imaging to quantify the contrast permeability of intracranial atherosclerotic disease plaques in symptomatic patients and to compare these parameters against existing markers of plaque volatility using black-blood MR imaging pulse sequences...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856436/diffusion-weighted-imaging-detected-ischemic-lesions-following-endovascular-treatment-of-cerebral-aneurysms-a-systematic-review-and-meta-analysis
#16
K M Bond, W Brinjikji, M H Murad, D F Kallmes, H J Cloft, G Lanzino
BACKGROUND AND PURPOSE: Endovascular treatment of intracranial aneurysms is associated with the risk of thromboembolic ischemic complications. Many of these events are asymptomatic and identified only on diffusion-weighted imaging. We performed a systematic review and meta-analysis to study the incidence of DWI positive for thromboembolic events following endovascular treatment of intracranial aneurysms. MATERIALS AND METHODS: A comprehensive literature search identified studies published between 2000 and April 2016 that reported postprocedural DWI findings in patients undergoing endovascular treatment of intracranial aneurysms...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856435/impact-of-pial-collaterals-on-infarct-growth-rate-in-experimental-acute-ischemic-stroke
#17
G A Christoforidis, P Vakil, S A Ansari, F H Dehkordi, T J Carroll
BACKGROUND AND PURPOSE: Cerebral infarction evolves at different rates depending on available blood flow suggesting that treatment time windows vary depending on the degree of pial collateral recruitment. This work sought to mathematically model infarct growth and determine whether infarct volume growth can be predicted by angiographic assessment of pial collateral recruitment in an experimental MCA occlusion animal model. MATERIALS AND METHODS: Pial collateral recruitment was quantified by using DSA, acquired 15 minutes following permanent MCA occlusion in 6 canines based on a scoring system (average pial collateral score) and arterial arrival time...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856434/dynamic-contrast-enhanced-mr-perfusion-of-intradural-spinal-lesions
#18
V Cuvinciuc, M Viallon, I Barnaure, M I Vargas, K-O Lovblad, S Haller
Fifteen patients with intradural spinal lesions were examined with an optimized dynamic contrast-enhanced MR perfusion sequence at 1.5T and 3T. SNR and mean contrast-to-noise ratio were better on 3T compared with 1.5T (P ≤ .05). The goodness of fit of the Tofts and Tofts extended pharmacokinetic models was similar between 1.5T and 3T. Thus, dynamic contrast-enhanced MR perfusion of intradural spinal canal lesions is technically feasible at 1.5T and 3T, with better image quality at 3T.
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27856433/efficacy-of-double-blind-peer-review-in-an-imaging-subspecialty-journal
#19
E E O'Connor, M Cousar, J A Lentini, M Castillo, K Halm, T A Zeffiro
BACKGROUND AND PURPOSE: Many scientific journals use double-blind peer review to minimize potential reviewer bias concerning publication recommendations. However, because neuroradiology is a relatively small subspecialty, this process may be limited by prior knowledge of the authors' work or associated institutions. We sought to investigate the efficacy of reviewer blinding and determine the impact that unblinding may have on manuscript acceptance. MATERIALS AND METHODS: For manuscripts submitted to the American Journal of Neuroradiology (AJNR) from January through June 2015, reviewers completed a brief anonymous questionnaire after submitting their evaluations, assessing whether they were familiar with the research or had knowledge of the authors or institutions from which the work originated...
November 17, 2016: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/27811135/treatment-of-intra-and-extracranial-aneurysms-using-the-flow-redirection-endoluminal-device-multicenter-experience-and-follow-up-results
#20
F Drescher, W Weber, A Berlis, S Rohde, A Carolus, S Fischer
BACKGROUND AND PURPOSE: Flow diversion emerged as a crucial treatment option for intracranial aneurysms. We report a multicenter retrospective analysis of the safety and efficacy in the treatment of intracranial aneurysms with the Flow-Redirection Endoluminal Device (FRED) flow diverter, a dual-layer flow-modulation device. MATERIALS AND METHODS: All intracranial aneurysms treated with the FRED between March 2013 and February 2016 at 4 neurovascular centers were included...
November 3, 2016: AJNR. American Journal of Neuroradiology
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