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AJNR. American Journal of Neuroradiology

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https://www.readbyqxmd.com/read/29217748/lower-arterial-cross-sectional-area-of-carotid-and-vertebral-arteries-and-higher-frequency-of-secondary-neck-vessels-are-associated-with-multiple-sclerosis
#1
P Belov, D Jakimovski, J Krawiecki, C Magnano, J Hagemeier, L Pelizzari, B Weinstock-Guttman, R Zivadinov
BACKGROUND AND PURPOSE: Arterial and neck vessel system characteristics of patients with multiple sclerosis have not been previously investigated. Therefore, the aim of this study was to examine the frequency of neck vessels and their cross-sectional areas (in square millimeters) between patients with MS and healthy controls. MATERIALS AND METHODS: In this study, 193 patients with MS and 193 age- and sex-matched healthy controls underwent 2D TOF venography at 3T...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217747/mr-perfusion-to-determine-the-status-of-collaterals-in-patients-with-acute-ischemic-stroke-a-look-beyond-time-maps
#2
K Nael, A Doshi, R De Leacy, J Puig, M Castellanos, J Bederson, T P Naidich, J Mocco, M Wintermark
BACKGROUND AND PURPOSE: Patients with acute stroke with robust collateral flow have better clinical outcomes and may benefit from endovascular treatment throughout an extended time window. Using a multiparametric approach, we aimed to identify MR perfusion parameters that can represent the extent of collaterals, approximating DSA. MATERIALS AND METHODS: Patients with anterior circulation proximal arterial occlusion who had baseline MR perfusion and DSA were evaluated...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217746/semiautomated-middle-ear-volume-measurement-as-a-predictor-of-postsurgical-outcomes-for-congenital-aural-atresia
#3
S J Kabadi, D S Ruhl, S Mukherjee, B W Kesser
BACKGROUND AND PURPOSE: Middle ear space is one of the most important components of the Jahrsdoerfer grading system (J-score), which is used to determine surgical candidacy for congenital aural atresia. The purpose of this study was to introduce a semiautomated method for measuring middle ear volume and determine whether middle ear volume, either alone or in combination with the J-score, can be used to predict early postoperative audiometric outcomes. MATERIALS AND METHODS: A retrospective analysis was conducted of 18 patients who underwent an operation for unilateral congenital aural atresia at our institution...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217745/intranasal-esthesioneuroblastoma-ct-patterns-aid-in-preventing-routine-nasal-polypectomy
#4
M E Peckham, R H Wiggins, R R Orlandi, Y Anzai, W Finke, H R Harnsberger
BACKGROUND AND PURPOSE: Esthesioneuroblastoma is a neuroectodermal tumor that commonly arises in the nasal cavity olfactory recess and, when isolated to the intranasal cavity, can be indistinguishable from benign processes. Because lesional aggressiveness requires a more invasive operation for resection than polypectomy, patients with isolated intranasal lesions were studied to define distinguishing CT characteristics. MATERIALS AND METHODS: Patients with intranasal esthesioneuroblastoma and controls without esthesioneuroblastoma with olfactory recess involvement were identified by using a report search tool...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217744/the-ct-swirl-sign-is-associated-with-hematoma-expansion-in-intracerebral-hemorrhage
#5
D Ng, L Churilov, P Mitchell, R Dowling, B Yan
BACKGROUND AND PURPOSE: Hematoma expansion is an independent determinant of poor clinical outcome in intracerebral hemorrhage. Although the "spot sign" predicts hematoma expansion, the identification requires CT angiography, which limits its general accessibility in some hospital settings. Noncontrast CT, without the need for CT angiography, may identify sites of active extravasation, termed the "swirl sign." We aimed to determine the association of the swirl sign with hematoma expansion...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217743/dural-arteriovenous-fistulas-a-characteristic-pattern-of-edema-and-enhancement-of-the-medulla-on-mri
#6
A Z Copelan, A Krishnan, H Marin, R Silbergleit
Medullary edema with enhancement is rarely reported at initial MR imaging in intracranial dural arteriovenous fistulas. We report a series of 5 patients with dural arteriovenous fistulas, all of whom demonstrated a characteristic pattern of central medullary edema and medullary enhancement at initial MR imaging. Cognard type V dural arteriovenous fistula, defined by drainage into the perimedullary veins and the veins surrounding the brain stem, is a rare yet well-described pathologic entity. Even more rarely reported, however, is its clinical presentation with predominantly bulbar symptoms and MR imaging findings of central medullary edema with enhancement...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217742/diagnostic-accuracy-of-centrally-restricted-diffusion-in-the-differentiation-of-treatment-related-necrosis-from-tumor-recurrence-in-high-grade-gliomas
#7
N Zakhari, M S Taccone, C Torres, S Chakraborty, J Sinclair, J Woulfe, G H Jansen, T B Nguyen
BACKGROUND AND PURPOSE: Centrally restricted diffusion has been demonstrated in recurrent high-grade gliomas treated with bevacizumab. Our purpose was to assess the accuracy of centrally restricted diffusion in the diagnosis of radiation necrosis in high-grade gliomas not treated with bevacizumab. MATERIALS AND METHODS: In this prospective study, we enrolled patients with high-grade gliomas who developed a new ring-enhancing necrotic lesion and who underwent re-resection...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217741/on-the-reproducibility-of-inversion-recovery-intravoxel-incoherent-motion-imaging-in-cerebrovascular-disease
#8
S M Wong, W H Backes, C E Zhang, J Staals, R J van Oostenbrugge, C R L P N Jeukens, J F A Jansen
BACKGROUND AND PURPOSE: Intravoxel incoherent motion imaging can measure both microvascular and parenchymal abnormalities simultaneously. The contamination of CSF signal can be suppressed using inversion recovery preparation. The clinical feasibility of inversion recovery-intravoxel incoherent motion imaging was investigated in patients with cerebrovascular disease by studying its reproducibility. MATERIALS AND METHODS: Sixteen patients with cerebrovascular disease (66 ± 8 years of age) underwent inversion recovery-intravoxel incoherent motion imaging twice...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217740/optic-nerve-measurement-on-mri-in-the-pediatric-population-normative-values-and-correlations
#9
C E Al-Haddad, M G Sebaaly, R N Tutunji, C J Mehanna, S R Saaybi, A M Khamis, R G Hourani
BACKGROUND AND PURPOSE: Few articles in the literature have looked at the diameter of the optic nerve on MR imaging, especially in children, in whom observations are subjective and no normative data exist. The aim of this study was to establish a data base for optic nerve diameter measurements on MR imaging in the pediatric population. MATERIALS AND METHODS: This was a retrospective study on the MR imaging of pediatric subjects (younger than 18 years of age) at the Department of Diagnostic Radiology at the American University of Beirut Medical Center, Beirut, Lebanon...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191875/lymphographic-like-technique-for-the-treatment-of-microcystic-lymphatic-malformation-components-of-3-mm
#10
V Da Ros, M Iacobucci, F Puccinelli, L Spelle, G Saliou
BACKGROUND AND PURPOSE: The treatment of microcystic lymphatic malformations remains challenging. Our aim was to describe the lymphographic-like technique, a new technique of slow bleomycin infusion for the treatment of microcyst components of <3 mm, performed at our institution. MATERIALS AND METHODS: A retrospective analysis of a prospectively collected lymphatic malformation data base was performed. Patients with at least 1 microcystic lymphatic malformation component demonstrated on MR imaging treated by lymphographic-like technique bleomycin infusion were included in the study...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191874/ct-attenuation-analysis-of-carotid-intraplaque-hemorrhage
#11
L Saba, M Francone, P P Bassareo, L Lai, R Sanfilippo, R Montisci, J S Suri, C N De Cecco, G Faa
BACKGROUND AND PURPOSE: Intraplaque hemorrhage is considered a leading parameter of carotid plaque vulnerability. Our purpose was to assess the CT characteristics of intraplaque hemorrhage with histopathologic correlation to identify features that allow for confirming or ruling out the intraplaque hemorrhage. MATERIALS AND METHODS: This retrospective study included 91 patients (67 men; median age, 65 ± 7 years; age range, 41-83 years) who underwent CT angiography and carotid endarterectomy from March 2010 to May 2013...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191873/time-for-a-time-window-extension-insights-from-late-presenters-in-the-escape-trial
#12
J W Evans, B R Graham, P Pordeli, F S Al-Ajlan, R Willinsky, W J Montanera, J L Rempel, A Shuaib, P Brennan, D Williams, D Roy, A Y Poppe, T G Jovin, T Devlin, B W Baxter, T Krings, F L Silver, D F Frei, C Fanale, D Tampieri, J Teitelbaum, D Iancu, J Shankar, P A Barber, A M Demchuk, M Goyal, M D Hill, B K Menon
BACKGROUND AND PURPOSE: The safety and efficacy of endovascular therapy for large-artery stroke in the extended time window is not yet well-established. We performed a subgroup analysis on subjects enrolled within an extended time window in the Endovascular Treatment for Small Core and Proximal Occlusion Ischemic Stroke (ESCAPE) trial. MATERIALS AND METHODS: Fifty-nine of 315 subjects (33 in the intervention group and 26 in the control group) were randomized in the ESCAPE trial between 5...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191872/influences-for-gender-disparity-in-academic-neuroradiology
#13
M Ahmadi, K Khurshid, P C Sanelli, S Jalalkhan, T Chahal, A Norbash, S Nicolaou, M Castillo, F Khosa
BACKGROUND AND PURPOSE: There has been extensive interest in promoting gender equality within radiology, a predominately male field. In this study, our aim was to quantify gender representation in neuroradiology faculty rankings and determine any related factors that may contribute to any such disparity. MATERIALS AND METHODS: We evaluated the academic and administrative faculty members of neuroradiology divisions for all on-line listed programs in the US and Canada...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191871/mr-imaging-characteristics-associate-with-tumor-associated-macrophages-in-glioblastoma-and-provide-an-improved-signature-for-survival-prognostication
#14
J Zhou, M V Reddy, B K J Wilson, D A Blair, A Taha, C M Frampton, R A Eiholzer, P Y C Gan, F Ziad, Z Thotathil, S Kirs, N A Hung, J A Royds, T L Slatter
BACKGROUND AND PURPOSE: In glioblastoma, tumor-associated macrophages have tumor-promoting properties. This study determined whether routine MR imaging features could predict molecular subtypes of glioblastoma that differ in the content of tumor-associated macrophages. MATERIALS AND METHODS: Seven internally derived MR imaging features were assessed in 180 patients, and 25 features from the Visually AcceSAble Rembrandt Images feature set were assessed in 164 patients...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191870/reproducibility-of-deep-gray-matter-atrophy-rate-measurement-in-a-large-multicenter-dataset
#15
A Meijerman, H Amiri, M D Steenwijk, M A Jonker, R A van Schijndel, K S Cover, H Vrenken
BACKGROUND AND PURPOSE: Precise in vivo measurement of deep GM volume change is a highly demanded prerequisite for an adequate evaluation of disease progression and new treatments. However, quantitative data on the reproducibility of deep GM structure volumetry are not yet available. In this paper we aim to investigate this reproducibility using a large multicenter dataset. MATERIALS AND METHODS: We have assessed the reproducibility of 2 automated segmentation software packages (FreeSurfer and the FMRIB Integrated Registration and Segmentation Tool) by quantifying the volume changes of deep GM structures by using back-to-back MR imaging scans from the Alzheimer Disease Neuroimaging Initiative's multicenter dataset...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191869/john-nash-and-the-organization-of-stroke-care
#16
M Goyal, A T Wilson, D Mayank, N Kamal, D H Robinson, D Turkel-Parrella, J A Hirsch
The concept of Nash equilibrium, developed by John Forbes Nash Jr, states that an equilibrium in noncooperative games is reached when each player takes the best action for himself or herself, taking into account the actions of the other players. We apply this concept to the provision of endovascular thrombectomy in the treatment of acute ischemic stroke and suggest that collaboration among hospitals in a health care jurisdiction could result in practices such as shared call pools for neurointervention teams, leading to better patient care through streamlined systems...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29191868/alphabet-soup-sagittal-balance-correction-osteotomies-of-the-spine-what-radiologists-should-know
#17
REVIEW
T Takahashi, D Kainth, S Marette, D Polly
Global sagittal malalignment has been demonstrated to have correlation with clinical symptoms and is a key component to be restored in adult spinal deformity. In this article, various types of sagittal balance-correction osteotomies are reviewed primarily on the basis of the 3 most commonly used procedures: Smith-Petersen osteotomy, pedicle subtraction osteotomy, and vertebral column resection. Familiarity with the expected imaging appearance and commonly encountered complications seen on postoperative imaging studies following correction osteotomies is crucial for accurate image interpretation...
November 30, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29170275/concerns-about-a-new-preterm-mr-imaging-scoring-system
#18
LETTER
L S de Vries, F M Cowan
No abstract text is available yet for this article.
November 23, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29170274/reply
#19
J M George, S Fiori, J Fripp, K Pannek, J Bursle, R X Moldrich, A Guzzetta, A Coulthard, R S Ware, S E Rose, P B Colditz, R N Boyd
No abstract text is available yet for this article.
November 23, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29170273/optimization-of-quantitative-dynamic-postgadolinium-mri-technique-using-normalized-ratios-for-the-evaluation-of-temporomandibular-joint-synovitis-in-patients-with-juvenile-idiopathic-arthritis
#20
P Caruso, K Buch, S Rincon, R Hakimelahi, Z S Peacock, C M Resnick, C Foster, L Guidoboni, T Donahue, R Macdonald, H Rothermel, H D Curtin, L B Kaban
BACKGROUND AND PURPOSE: MR imaging has been shown to be useful in the diagnosis of juvenile idiopathic arthritis of the temporomandibular joint. Prior MR imaging approaches have relied mainly on the subjective interpretation of synovial enhancement as a marker for synovial inflammation. Although, more recently, several attempts have been made to quantify synovial enhancement, these methods have not taken into account the dynamic enhancement characteristics of the temporomandibular joint and the effect of sampling time...
November 23, 2017: AJNR. American Journal of Neuroradiology
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