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AJNR. American Journal of Neuroradiology

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https://www.readbyqxmd.com/read/28619842/cumulative-dose-of-macrocyclic-gadolinium-based-contrast-agent-improves-detection-of-enhancing-lesions-in-patients-with-multiple-sclerosis
#1
A Rovira, C Auger, E Huerga, J F Corral, R Mitjana, J Sastre-Garriga, M Tintoré, X Montalban
BACKGROUND AND PURPOSE: Gadolinium-enhanced MR imaging is currently the reference standard for detecting active inflammatory lesions in patients with multiple sclerosis. The sensitivity of MR imaging for this purpose may vary according to the physicochemical characteristics of the contrast agent used and the acquisition strategy. The purpose of this study was to compare detection of gadolinium- enhancing lesions or active disease following a single or cumulative dose of a macrocyclic gadolinium-based contrast agent with different image acquisition delays in patients with clinically isolated syndrome or relapsing multiple sclerosis...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619841/the-concept-of-number-needed-to-image
#2
LETTER
S Haller
No abstract text is available yet for this article.
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619840/does-3t-fetal-mri-improve-image-resolution-of-normal-brain-structures-between-20-and-24-weeks-gestational-age
#3
G Priego, N J Barrowman, J Hurteau-Miller, E Miller
BACKGROUND AND PURPOSE: Stronger magnetic fields have the potential to improve fetal image resolution. Our objective was to detect whether there was better anatomic resolution of brain structures in fetuses imaged with a 3T magnet compared with a 1.5T magnet. MATERIALS AND METHODS: Multiple cerebral and facial anatomic structures were retrospectively assessed in 28 fetal MR imaging scans with normal findings (12 at 3T and 16 at 1.5T) with a 0 -3 grading score. Fetuses were assessed during the second trimesters (gestational age, 20 -24 weeks)...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619839/transcranial-duplex-sonography-predicts-outcome-following-an-intracerebral-hemorrhage
#4
P Camps-Renom, J Méndez, E Granell, F Casoni, L Prats-Sánchez, A Martínez-Domeño, D Guisado-Alonso, J Martí-Fàbregas, R Delgado-Mederos
BACKGROUND AND PURPOSE: Several radiologic features such as hematoma volume are related to poor outcome following an intra- cerebral hemorrhage and can be measured with transcranial duplex sonography. We sought to determine the prognostic value of transcranial duplex sonography in patients with intracerebral hemorrhage. MATERIALS AND METHODS: We conducted a prospective study of patients diagnosed with spontaneous intracerebral hemorrhage. Transcranial duplex sonography examinations were performed within 2 hours of baseline CT, and we recorded the following variables: hematoma volume, midline shift, third ventricle and lateral ventricle diameters, and the pulsatility index in both MCAs...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619838/state-of-practice-endovascular-treatment-of-acute-aneurysmal-sah-in-germany
#5
H Janssen, A Berlis, J Lutz, N Thon, H Brückmann
BACKGROUND AND PURPOSE: Acute aneurysmal SAH is a severe disease that requires prompt treatment. Endovascular coiling and neurosurgical clipping are established treatment options. Our intention was to determine the state of current practice in acute aneurysmal SAH treatment in Germany, with emphasis on logistic and temporal aspects. MATERIALS AND METHODS: We interviewed 74 German university and nonuniversity hospitals with an anonymous questionnaire comprising 15 questions concerning the practice of treatment and diagnostics of acute aneurysmal SAH at their respective institutions...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619837/differentiation-between-treatment-induced-necrosis-and-recurrent-tumors-in-patients-with-metastatic-brain-tumors-comparison-among-11-c-methionine-pet-fdg-pet-mr-permeability-imaging-and-mri-adc-preliminary-results
#6
N Tomura, M Kokubun, T Saginoya, Y Mizuno, Y Kikuchi
BACKGROUND AND PURPOSE: In patients with metastatic brain tumors after gamma knife radiosurgery, the superiority of PET using (11)C-methionine for differentiating radiation necrosis and recurrent tumors has been accepted. To evaluate the feasibility of MR permea- bility imaging, it was compared with PET using (11)C-methionine, FDG-PET, and DWI for differentiating radiation necrosis from recurrent tumors. MATERIALS AND METHODS: The study analyzed 18 lesions from 15 patients with metastatic brain tumors who underwent gamma knife radiosurgery...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619836/risk-factor-analysis-of-recanalization-timing-in-coiled-aneurysms-early-versus-late-recanalization
#7
J P Jeon, Y D Cho, D H Yoo, J Moon, J Lee, W-S Cho, H-S Kang, J E Kim, M H Han
BACKGROUND AND PURPOSE: Long-term documentation of anatomic and angiographic characteristics pertaining to the timing of recanalization in coiled aneurysms has been insufficient. Our intent was to analyze and compare early and late-phase recanalization after coiling, identifying respective risk factors. MATERIALS AND METHODS: A total of 870 coiled saccular aneurysms were monitored for extended periods (mean, 30.8 ± 8.3 months). Medical records and radiologic data were also reviewed, stratifying patients as either early (n = 128) or late (n = 52) recanalization or as complete occlusion (n = 690)...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619835/regarding-what-is-the-ideal-core-number-for-ultrasonography-guided-thyroid-biopsy-of-cytologically-inconclusive-nodules
#8
LETTER
H S Park, J H Baek, N D Gyu
No abstract text is available yet for this article.
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619834/temporal-and-spatial-variances-in-arterial-spin-labeling-are-inversely-related-to-large-artery-blood-velocity
#9
A D Robertson, G Matta, V S Basile, S E Black, C K Macgowan, J A Detre, B J MacIntosh
BACKGROUND AND PURPOSE: The relationship between extracranial large-artery characteristics and arterial spin-labeling MR imaging may influence the quality of arterial spin-labeling-CBF images for older adults with and without vascular pathology. We hypothesized that extracranial arterial blood velocity can explain between-person differences in arterial spin-labeling data systematically across clinical populations. MATERIALS AND METHODS: We performed consecutive pseudocontinuous arterial spin-labeling and phase-contrast MR imaging on 82 individuals (20 - 88 years of age, 50% women), including healthy young adults, healthy older adults, and older adults with cerebral small vessel disease or chronic stroke infarcts...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28619833/ct-angiography-aspects-predicts-outcome-much-better-than-noncontrast-ct-in-patients-with-stroke-treated-endovascularly
#10
F Sallustio, C Motta, S Pizzuto, M Diomedi, B Rizzato, M Panella, F Alemseged, M Stefanini, S Fabiano, R Gandini, R Floris, P Stanzione, G Koch
BACKGROUND AND PURPOSE: Noncontrast CT ASPECTS has been investigated as a predictor of outcome in patients with acute ischemic stroke. Our purpose was to investigate whether CTA source images are a better predictor of clinical and radiologic outcomes than NCCT ASPECTS in candidates for endovascular stroke therapy. MATERIALS AND METHODS: CT scans of patients (n = 124) were independently evaluated by 2 readers for baseline NCCT and CTA source image ASPECTS and for follow-up ASPECTS...
June 15, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596196/effect-of-retrievable-stent-size-on-endovascular-treatment-of-acute-ischemic-stroke-a-multicenter-study
#11
D Yang, Y Hao, W Zi, H Wang, D Zheng, H Li, M Tu, Y Wan, P Jin, G Xiao, Y Xiong, G Xu, X Liu
BACKGROUND AND PURPOSE: In clinical practice, stent diameter is one of the variable properties important for endovascular treatment. A consensus guideline for stent retriever size selection has yet to be established. The aim of this study was to investigate the effects of different diameters of Solitaire retrievers on outcomes. MATERIALS AND METHODS: Of 628 patients enrolled from the Endovascular Treatment for Acute Anterior Circulation Ischemic Stroke Registry, 256 were treated with the Solitaire 4-mm device and 372, with the 6-mm device...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596195/e-aspects-correlates-with-and-is-predictive-of-outcome-after-mechanical-thrombectomy
#12
J Pfaff, C Herweh, S Schieber, S Schönenberger, J Bösel, P A Ringleb, M Möhlenbruch, M Bendszus, S Nagel
BACKGROUND AND PURPOSE: The e-ASPECTS software is a tool for the automated use of ASPECTS. Our aim was to analyze whether baseline e-ASPECT scores correlate with outcome after mechanical thrombectomy. MATERIALS AND METHODS: Patients with ischemic strokes in the anterior circulation who were admitted between 2010 and 2015, diagnosed by CT, and received mechanical thrombectomy were included. The ASPECTS on baseline CT was scored by e-ASPECTS and 3 expert raters, and interclass correlation coefficients were calculated...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596194/influence-of-ultra-low-dose-and-iterative-reconstructions-on-the-visualization-of-orbital-soft-tissues-on-maxillofacial-ct
#13
G Widmann, D Juranek, F Waldenberger, P Schullian, A Dennhardt, R Hoermann, M Steurer, E-M Gassner, W Puelacher
BACKGROUND AND PURPOSE: Dose reduction on CT scans for surgical planning and postoperative evaluation of midface and orbital fractures is an important concern. The purpose of this study was to evaluate the variability of various low-dose and iterative reconstruction techniques on the visualization of orbital soft tissues. MATERIALS AND METHODS: Contrast-to-noise ratios of the optic nerve and inferior rectus muscle and subjective scores of a human cadaver were calculated from CT with a reference dose protocol (CT dose index volume = 36...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596193/mr-imaging-diagnosis-of-diencephalic-mesencephalic-junction-dysplasia-in-fetuses-with-developmental-ventriculomegaly
#14
M Severino, A Righini, D Tortora, L Pinelli, C Parazzini, G Morana, P Accorsi, V Capra, D Paladini, A Rossi
Diencephalic-mesencephalic junction dysplasia is a rare malformation characterized by a poorly defined junction between the diencephalon and the mesencephalon, associated with a characteristic butterfly-like contour of the midbrain (butterfly sign). This condition may be variably associated with other brain malformations, including callosal abnormalities and supratentorial ventricular dilation, and is a potential cause of developmental hydrocephalus. Here, we have reported 13 fetuses with second-trimester obstructive ventriculomegaly and MR features of diencephalic-mesencephalic junction dysplasia, correlating the fetal imaging with available pathology and/or postnatal data...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596192/the-impact-of-conscious-sedation-versus-general-anesthesia-for-stroke-thrombectomy-on-the-predictive-value-of-collateral-status-a-post-hoc-analysis-of-the-siesta-trial
#15
S Schönenberger, J Pfaff, L Uhlmann, C Klose, S Nagel, P A Ringleb, W Hacke, M Kieser, M Bendszus, M A Möhlenbruch, J Bösel
BACKGROUND AND PURPOSE: Radiologic selection criteria to identify patients likely to benefit from endovascular stroke treatment are still controversial. In this post hoc analysis of the recent randomized Sedation versus Intubation for Endovascular Stroke TreAtment (SIESTA) trial, we aimed to investigate the impact of sedation mode (conscious sedation versus general anesthesia) on the predictive value of collateral status. MATERIALS AND METHODS: Using imaging data from SIESTA, we assessed collateral status with the collateral score of Tan et al and graded it from absent to good collaterals (0-3)...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596191/perfusion-mr-imaging-using-a-3d-pulsed-continuous-arterial-spin-labeling-method-for-acute-cerebral-infarction-classified-as-branch-atheromatous-disease-involving-the-lenticulostriate-artery-territory
#16
Y Shinohara, A Kato, K Kuya, K Okuda, M Sakamoto, H Kowa, T Ogawa
BACKGROUND AND PURPOSE: Branch atheromatous disease is a stroke subtype considered a risk factor for early neurologic deterioration. Meanwhile, crossed cerebellar diaschisis is thought to be influenced by the degree and location of supratentorial perfusion abnormalities and is associated with the clinical outcome in the case of an ischemic stroke. In this article, our aim was to clarify the utility of using a whole-brain 3D pulsed continuous arterial spin-labeling method as an imaging biomarker for predicting neurologic severity in branch atheromatous disease...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596190/to-tpa-or-not-to-tpa-that-is-the-question
#17
T M Leslie-Mazwi, R V Chandra, J A Hirsch
No abstract text is available yet for this article.
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596189/reliability-of-white-matter-microstructural-changes-in-hiv-infection-meta-analysis-and-confirmation
#18
E E O'Connor, A Jaillard, F Renard, T A Zeffiro
BACKGROUND: Diffusion tensor imaging has been widely used to measure HIV effects on white matter microarchitecture. While many authors have reported reduced fractional anisotropy and increased mean diffusivity in HIV, quantitative inconsistencies across studies are numerous. PURPOSE: Our aim was to evaluate the consistency across studies of HIV effects on DTI measures and then examine the DTI reliability in a longitudinal seropositive cohort. DATA SOURCES: Published studies and investigators...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596188/retrospective-validation-of-a-computer-assisted-quantification-model-of-intracerebral-hemorrhage-volume-on-accuracy-precision-and-acquisition-time-compared-with-standard-abc-2-manual-volume-calculation
#19
W Xue, S Vegunta, C M Zwart, M I Aguilar, A C Patel, J M Hoxworth, B M Demaerschalk, J R Mitchell
BACKGROUND AND PURPOSE: Intracerebral hemorrhage accounts for 6.5%-19.6% of all acute strokes. Initial intracerebral hemorrhage volume and expansion are both independent predictors of clinical outcomes and mortality. Therefore, a rapid, unbiased, and precise measurement of intracerebral hemorrhage volume is a key component of clinical management. The most commonly used method, ABC/2, results in overestimation. We developed an interactive segmentation program, SegTool, using a novel graphic processing unit, level set algorithm...
June 8, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28596187/functional-connectivity-in-virally-suppressed-patients-with-hiv-associated-neurocognitive-disorder-a-resting-state-analysis
#20
J R Chaganti, A Heinecke, T M Gates, K J Moffat, B J Brew
BACKGROUND AND PURPOSE: HIV-associated neurocognitive disorder still occurs despite virally suppressive combination antiretroviral therapy. In the pre-combination antiretroviral era and in patients without HIV suppression, HIV-associated neurocognitive disorder was caused by synaptodendritic injury resulting in impairment of neural networks, characterized by decreased attention, psychomotor slowing, and working memory deficits. Whether similar pathogenesis is true for HIV-associated neurocognitive disorder in the context of viral suppression is not clear...
June 8, 2017: AJNR. American Journal of Neuroradiology
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