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Neuroradiology

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https://www.readbyqxmd.com/read/28091696/radiation-dose-reduction-in-parasinus-ct-by-spectral-shaping
#1
Matthias S May, Michael Brand, Michael M Lell, Martin Sedlmair, Thomas Allmendinger, Michael Uder, Wolfgang Wuest
INTRODUCTION: Spectral shaping aims to narrow the X-ray spectrum of clinical CT. The aim of this study was to determine the image quality and the extent of radiation dose reduction that can be achieved by tin prefiltration for parasinus CT. METHODS: All scans were performed with a third generation dual-source CT scanner. A study protocol was designed using 100 kV tube voltage with tin prefiltration (200 mAs) that provides image noise levels comparable to a low-dose reference protocol using 100 kV without spectral shaping (25 mAs)...
January 16, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28083644/evaluation-of-deep-gray-matter-volume-cortical-thickness-and-white-matter-integrity-in-patients-with-typical-absence-epilepsy-a-study-using-voxelwise-based-techniques
#2
D G Corrêa, N Ventura, N Zimmermann, T M Doring, G Tukamoto, J Leme, M Pereira, I D'Andrea, C Rêgo, S V Alves-Leon, E L Gasparetto
INTRODUCTION: The objective of this study was to evaluate the cortical thickness and the volume of deep gray matter structures, measured from 3D T1-weighted gradient echo imaging, and white matter integrity, by diffusion tensor imaging (DTI) in patients with typical absence epilepsy (AE). METHODS: Patients (n = 19) with typical childhood AE and juvenile AE, currently taking antiepileptic medication, were compared with control subjects (n = 19), matched for gender and age...
January 12, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28074235/long-term-brain-structural-magnetic-resonance-imaging-and-cognitive-functioning-in-children-treated-for-acute-lymphoblastic-leukemia-with-high-dose-methotrexate-chemotherapy-alone-or-combined-with-cns-radiotherapy-at-reduced-total-dose-to-12%C3%A2-gy
#3
Olga Zając-Spychała, Mikołaj A Pawlak, Katarzyna Karmelita-Katulska, Jakub Pilarczyk, Katarzyna Derwich, Jacek Wachowiak
INTRODUCTION: The aim of this study was to assess the long-term side effects of central nervous system prophylaxis (high-dose chemotherapy alone vs chemotherapy and CNS radiotherapy) according to the ALL IC-BFM 2002. METHODS: Thirty-tree children aged 6.7-19.9 years have been studied. The control group consisted of 12 children newly diagnosed with acute lymphoblastic leukemia. We assessed subcortical gray matter volume using automatic MRI segmentation and cognitive performance to identify differences between two therapeutic schemes and patients prior to treatment...
January 10, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28070598/advanced-mri-assessment-to-predict-benefit-of-anti-programmed-cell-death-1-protein-immunotherapy-response-in-patients-with-recurrent-glioblastoma
#4
Lei Qin, Xiang Li, Amanda Stroiney, Jinrong Qu, Jeffrey Helgager, David A Reardon, Geoffrey S Young
INTRODUCTION: We describe the imaging findings encountered in GBM patients receiving immune checkpoint blockade and assess the potential of quantitative MRI biomarkers to differentiate patients who derive therapeutic benefit from those who do not. METHODS: A retrospective analysis was performed on longitudinal MRIs obtained on recurrent GBM patients enrolled on clinical trials. Among 10 patients with analyzable data, bidirectional diameters were measured on contrast enhanced T1 (pGd-T1WI) and volumes of interest (VOI) representing measurable abnormality suggestive of tumor were selected on pGdT1WI (pGdT1 VOI), FLAIR-T2WI (FLAIR VOI), and ADC maps...
January 9, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28062908/role-of-altered-cerebello-thalamo-cortical-network-in-the-neurobiology-of-essential-tremor
#5
Abhishek Lenka, Ketaki Swapnil Bhalsing, Rajanikant Panda, Ketan Jhunjhunwala, Rajini M Naduthota, Jitender Saini, Rose Dawn Bharath, Ravi Yadav, Pramod Kumar Pal
INTRODUCTION: Essential tremor (ET) is the most common movement disorder among adults. Although ET has been recognized as a mono-symptomatic benign illness, reports of non-motor symptoms and non-tremor motor symptoms have increased its clinical heterogeneity. The neural correlates of ET are not clearly understood. The aim of this study was to understand the neurobiology of ET using resting state fMRI. METHODS: Resting state functional MR images of 30 patients with ET and 30 age- and gender-matched healthy controls were obtained...
January 6, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28050639/cerebral-bone-subtraction-ct-angiography-using-80%C3%A2-kvp-and-sinogram-affirmed-iterative-reconstruction-contrast-medium-and-radiation-dose-reduction-with-improvement-of-image-quality
#6
Yasunori Nagayama, Takeshi Nakaura, Akinori Tsuji, Joji Urata, Mitsuhiro Furusawa, Hideaki Yuki, Kenichiro Hirarta, Seitaro Oda, Masafumi Kidoh, Daisuke Utsunomiya, Yasuyuki Yamashita
INTRODUCTION: The purpose of this study was to evaluate the feasibility of a contrast medium (CM), radiation dose reduction protocol for cerebral bone-subtraction CT angiography (BSCTA) using 80-kVp and sinogram-affirmed iterative reconstruction (SAFIRE). METHODS: Seventy-five patients who had undergone BSCTA under the 120- (n = 37) or the 80-kVp protocol (n = 38) were included. CM was 370 mgI/kg for the 120-kVp and 296 mgI/kg for the 80-kVp protocol; the 120- and the 80-kVp images were reconstructed with filtered back-projection (FBP) and SAFIRE, respectively...
January 3, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28028565/severe-cerebral-hypovolemia-on-perfusion-ct-and-lower-body-weight-are-associated-with-parenchymal-haemorrhage-after-thrombolysis
#7
S Tsetsou, M Amiguet, A Eskandari, R Meuli, P Maeder, B Jiang, M Wintermark, P Michel
INTRODUCTION: Haemorrhagic transformation of acute ischemic stroke (AIS) and particularly parenchymal haemorrhage (PH) remains a feared complication of intravenous thrombolysis (IVT). We aimed to identify clinical and perfusion CT (PCT) variables which are independently associated with PHs. METHODS: In this observational cohort study, based on the Acute Stroke Registry Analysis of Lausanne (ASTRAL) from 2003 to December 2013, we selected patients with AIS involving the middle cerebral artery (MCA) territory who were thrombolysed within 4...
December 27, 2016: Neuroradiology
https://www.readbyqxmd.com/read/28005160/a-contemporary-framework-of-language-processing-in-the-human-brain-in-the-context-of-preoperative-and-intraoperative-language-mapping
#8
Erik H Middlebrooks, Kaan Yagmurlu, Jerzey P Szaflarski, Maryam Rahman, Baran Bozkurt
INTRODUCTION: The emergence of advanced in vivo neuroimaging methods has redefined the understanding of brain function with a shift from traditional localizationist models to more complex and widely distributed neural networks. In human language processing, the traditional localizationist models of Wernicke and Broca have fallen out of favor for a dual-stream processing system involving complex networks organized over vast areas of the dominant hemisphere. The current review explores the cortical function and white matter connections of human language processing, as well as their relevance to surgical planning...
December 22, 2016: Neuroradiology
https://www.readbyqxmd.com/read/27913820/cerebral-blood-flow-transit-time-and-apparent-diffusion-coefficient-in-moyamoya-disease-before-and-after-acetazolamide
#9
Christian Federau, Soren Christensen, Zungho Zun, Sun-Won Park, Wendy Ni, Michael Moseley, Greg Zaharchuk
INTRODUCTION: The goal of this study was to assess the changes in arterial spin labeling (ASL) cerebral blood flow (CBF) and arterial transit time (ATT), and in apparent diffusion coefficient (ADC), before and after an acetazolamide challenge in moyamoya patients, as function of arterial stenosis severity. METHODS: Pre-operative patients diagnosed with moyamoya disease who could undergo MRI at 3.0T were recruited for this study. A multi-delay pseudo-continuous ASL and a diffusion-weighted sequence were acquired before and 15 min after acetazolamide injection...
December 2, 2016: Neuroradiology
https://www.readbyqxmd.com/read/28091720/european-society-of-neuroradiology-esnr
#10
(no author information available yet)
No abstract text is available yet for this article.
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/28091719/thank-you-guy
#11
EDITORIAL
Rüdiger von Kummer
No abstract text is available yet for this article.
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/28091718/esnr-presidential-address-2017
#12
EDITORIAL
Alex Rovira
No abstract text is available yet for this article.
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/28035426/diagnostic-imaging-of-dementia-with-lewy-bodies-by-susceptibility-weighted-imaging-of-nigrosomes-versus-striatal-dopamine-transporter-single-photon-emission-computed-tomography-a-retrospective-observational-study
#13
Koji Kamagata, Tomoya Nakatsuka, Ryuji Sakakibara, Yohei Tsuyusaki, Tomohiro Takamura, Kanako Sato, Michimasa Suzuki, Masaaki Hori, Kanako K Kumamaru, Tsutomu Inaoka, Shigeki Aoki, Hitoshi Terada
INTRODUCTION: The characteristics of dementia with Lewy bodies (DLB), Alzheimer's disease (AD) and amnestic mild cognitive impairment (a-MCI) overlap but require different treatments; therefore, it is important to differentiate these pathologies. Assessment of dopamine uptake in the striatum using dopamine transporter (DaT) single-photon emission computed tomography (SPECT) is the gold standard for diagnosing DLB; however, this modality is expensive, time consuming and involves radiation exposure...
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/28028564/evolution-of-diffusion-tensor-imaging-parameters-after-acute-subarachnoid-haemorrhage-a-prospective-cohort-study
#14
Isabel Fragata, Patrícia Canhão, Marta Alves, Ana Luísa Papoila, Nuno Canto-Moreira
INTRODUCTION: Few studies assessed diffusion tensor imaging (DTI) changes in the acute phase of subarachnoid haemorrhage (SAH). We prospectively evaluated DTI parameters in the acute phase of SAH and 8-10 days after and analysed whether changes could be related to SAH severity or to the development of delayed cerebral ischemia (DCI). METHODS: Apparent diffusion coefficient (ADC) and fractional anisotropy (FA) changes over time were assessed in a prospective cohort of patients with acute SAH...
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/27924360/perfusion-imaging-of-brain-gliomas-using-arterial-spin-labeling-correlation-with-histopathological-vascular-density-in-mri-guided-biopsies
#15
Di Ningning, Pang Haopeng, Dang Xuefei, Cheng Wenna, Ren Yan, Wu Jingsong, Yao Chengjun, Yao Zhenwei, Feng Xiaoyuan
INTRODUCTION: This study was designed to determine if cerebral blood flow (CBF) derived from arterial spin labeling (ASL) perfusion imaging could be used to quantitatively evaluate the microvascular density (MVD) of brain gliomas on a "point-to-point" basis by matching CBF areas and surgical biopsy sites as accurate as possible. METHODS: The study enrolled 47 patients with treatment-naive brain gliomas who underwent preoperative ASL, 3D T1-weighted imaging with gadolinium contrast enhancement (3D T1C+), and T2 fluid acquisition of inversion recovery (T2FLAIR) sequences before stereotactic surgery...
January 2017: Neuroradiology
https://www.readbyqxmd.com/read/27957614/annual-report-2016
#16
(no author information available yet)
No abstract text is available yet for this article.
December 2016: Neuroradiology
https://www.readbyqxmd.com/read/27913819/erratum-to-38-th-european-society-of-neuroradiology-diagnostic-and-interventional-annual-meeting
#17
Guido Wilms, Majda Thurnher
No abstract text is available yet for this article.
December 2016: Neuroradiology
https://www.readbyqxmd.com/read/27844093/fractional-anisotropy-and-diffusivity-changes-in-thyroid-associated-orbitopathy
#18
Ji Sung Han, Hyung Suk Seo, Young Hen Lee, Hwa Lee, Sang-Il Suh, Eun-Kee Jeong, Nabraj Sapkota, Ki Joon Kim
INTRODUCTION: To investigate the extraocular muscle (EOM) changes in thyroid-associated orbitopathy (TAO) on DTI and the correlations between DTI parameters and clinical features. METHODS: Twenty TAO patients and 20 age- and sex-matched controls provided informed consent and were enrolled. Ten-directional DTI was acquired in orbit. Fractional anisotropy (FA), mean, axial, and radial diffusivities were obtained at medial and lateral EOMs in both orbits. EOM thickness was measured in patients using axial CT images...
December 2016: Neuroradiology
https://www.readbyqxmd.com/read/27826668/editorial-founding-members-of-the-esnr
#19
EDITORIAL
Guido Wilms, Majda Thurnher
No abstract text is available yet for this article.
December 2016: Neuroradiology
https://www.readbyqxmd.com/read/27826667/is-advanced-neuroimaging-for-neuroradiologists-a-systematic-review-of-the-scientific-literature-of-the-last-decade
#20
Sirio Cocozza, Camilla Russo, Giuseppe Pontillo, Lorenzo Ugga, Antonio Macera, Amedeo Cervo, Maria De Liso, Nilde Di Paolo, Maria Isabella Ginocchio, Flavio Giordano, Giuseppe Leone, Giovanni Rusconi, Arnaldo Stanzione, Francesco Briganti, Mario Quarantelli, Ferdinando Caranci, Alessandra D'Amico, Andrea Elefante, Enrico Tedeschi, Arturo Brunetti
INTRODUCTION: To evaluate if advanced neuroimaging research is mainly conducted by imaging specialists, we investigated the number of first authorships by radiologists and non-radiologist scientists in articles published in the field of advanced neuroimaging in the past 10 years. METHODS: Articles in the field of advanced neuroimaging identified in this retrospective bibliometric analysis were divided in four groups, depending on the imaging technique used. For all included studies, educational background of the first authors was recorded (based on available online curriculum vitae) and classified in subgroups, depending on their specialty...
December 2016: Neuroradiology
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