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Neuroradiology

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https://www.readbyqxmd.com/read/29789895/diffusion-weighted-imaging-determinants-for-acute-ischemic-stroke-diagnosis-in-the-emergency-room
#1
Alejandro M Brunser, Gabriel Cavada, Paula Muñoz Venturelli, Verónica Olavarría, Alexis Rojo, Juan Almeida, Violeta Díaz, Arnold Hoppe, Pablo Lavados
PURPOSE: The aim of this study was to investigate the clinical-radiological determinants of diffusion-weighted image (DWI) abnormalities in patients with suspected acute ischemic stroke (AIS) seen at the emergency room (ER). METHODS: During the study period, 882 consecutive patients were screened at Clínica Alemana de Santiago, Chile; 786 had AIS and 711 (90.4%) were included. RESULTS: DWI demonstrated 87.3% sensitivity and 99.0% specificity, with a positive likelihood ratio of 79 and a negative likelihood ratio of 0...
May 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29777252/noninvasively-evaluating-the-grading-and-idh1-mutation-status-of-diffuse-gliomas-by-three-dimensional-pseudo-continuous-arterial-spin-labeling-and-diffusion-weighted-imaging
#2
Tingting Liu, Guang Cheng, Xiaowei Kang, Yibin Xi, Yuanqiang Zhu, Kai Wang, Chao Sun, Jing Ye, Ping Li, Hong Yin
PURPOSE: To noninvasively evaluate the value of three-dimensional pseudo-continuous arterial spin labeling (3D pCASL) and diffusion-weighted imaging (DWI) in diffuse gliomas grading as well as isocitrate dehydrogenase (IDH) 1 mutation status. METHODS: Fifty-six patients with pathologically confirmed diffuse gliomas with preoperative 3D pCASL and DWI were enrolled in this study. The Student's t test and Mann-Whitney U test were used to evaluate differences in parameters of DWI and 3D pCASL between low and high grade as well as between mutant and wild-type IDH1 diffuse gliomas; receiver operator characteristic (ROC) analysis was used to assess the diagnostic performance...
May 18, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29774383/acute-invasive-fungal-rhinosinusitis-mr-imaging-features-and-their-impact-on-prognosis
#3
Ye Ra Choi, Ji-Hoon Kim, Hye Sook Min, Jae-Kyung Won, Hyun Jik Kim, Roh-Eul Yoo, Koung Mi Kang, Sun-Won Park, Tae Jin Yun, Seung Hong Choi, Chul-Ho Sohn, Jung Hyo Rhim, Soo Chin Kim, Jae Wook Ryu, Dong Gyu Na
PURPOSE: Acute invasive fungal rhinosinusitis (AIFRS) is a life-threatening disease that is difficult to diagnose. Its overall imaging features have not been evaluated and the prognostic impact is unclear. The purpose of our study was to present MR imaging features and their impact on prognosis of AIFRS. METHODS: MR images and clinical records of 23 patients with AIFRS were retrospectively evaluated to identify the imaging features and to determine the factors affecting patients' survival...
May 17, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29766237/correction-to-stent-placement-in-patients-with-acute-subarachnoid-haemorrhage-when-is-it-justified
#4
Andrew G Murchison, Victoria Young, Tanja Djurdjevic, Martino Cellerini, Rufus Corkill, Wilhelm Küker
In the original version of this article one author name was published incorrectly: Tanja Ddjurdjevic has been corrected to Tanja Djurdjevic.
May 16, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29761220/transcriptomic-analysis-of-the-harvested-endothelial-cells-in-a-swine-model-of-mechanical-thrombectomy
#5
Nasren Jaff, Rikard Grankvist, Lars Muhl, Arvin Chireh, Mikael Sandell, Stefan Jonsson, Fabian Arnberg, Ulf Eriksson, Staffan Holmin
PURPOSE: In mechanical thrombectomy (MT) for ischemic stroke, endothelial cells (ECs) from intracranial blood vessels adhere to the stent retriever device and can be harvested. However, understanding the molecular biology and the role of the endothelium in different pathological conditions remains insufficient. The purpose of the study was to characterize and analyze the molecular aspect of harvested ECs using cell culture and transcriptomic techniques in an MT swine model relevant to clinical ischemic stroke...
May 14, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29752489/cerebral-venous-thrombosis-state-of-the-art-diagnosis-and-management
#6
REVIEW
Adam A Dmytriw, Jin Soo A Song, Eugene Yu, Colin S Poon
PURPOSE: This review article aims to discuss the pathophysiology, clinical presentation, and neuroimaging of cerebral venous thrombosis (CVT). Different approaches for diagnosis of CVT, including CT/CTV, MRI/MRV, and US will be discussed and the reader will become acquainted with imaging findings as well as limitations of each modality. Lastly, this exhibit will review the standard of care for CVT treatment and emerging endovascular options. METHODS: A literature search using PubMed and the MEDLINE subengine was completed using the terms "cerebral venous thrombosis," "stroke," and "imaging...
May 11, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29737413/correction-to-does-stent-type-impact-coil-embolization-outcomes-in-extended-follow-up-of-small-sized-aneurysms-10-mm
#7
Jeongjun Lee, Young Dae Cho, Dong Hyun Yoo, Hyun-Seung Kang, Won-Sang Cho, Jeong Eun Kim, Jusun Moon, Moon Hee Han
The original version of this article contained a mistake in Fig. 4: Fig. 4a and d were interchanged. The correct figure is shown below. The original article has been corrected.
May 7, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29736618/leptomeningeal-form-of-immunoglobulin-g4-related-hypertrophic-meningitis-with-perivascular-spread-a-case-report-and-review-of-the-literature
#8
Jasmina Boban, Selin Ardalı, Majda M Thurnher
PURPOSE: Immunoglobulin G4 (IgG4)-related disease represents a spectrum of fibro-inflammatory disorders that affects various organ systems, including the central nervous system. METHODS: Here we present the case of lgG4-related hypertrophic meningitis with exclusively leptomeningeal involvement and spread via perivascular spaces. RESULTS: A 58-year-old male patient presented with complex partial seizures. Initial computed tomography examination showed left frontal sulcal hyperdensity...
May 7, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29725694/small-high-signal-lesions-posterior-to-the-intracranial-vertebral-artery-incidentally-identified-by-3d-flair-retrospective-study-of-127-patients
#9
Ryota Kogue, Masayuki Maeda, Maki Umino, Kazuhiro Tsuchiya, Hajime Sakuma
PURPOSE: A small, benign high-signal lesion (HSL) posterior to the intracranial vertebral artery (VA) at the foramen magnum is a new entity revealed by a 3D FLAIR sequence. However, this entity has not been sufficiently investigated. We aimed to investigate the MR imaging findings of HSLs posterior to the intracranial VA that were incidentally detected by 3D FLAIR. METHODS: We retrospectively evaluated 3717 patients using a 3-T MR unit. HSLs on 3D FLAIR were assessed for prevalence, size, contact with the spinal accessory nerve (SAN), and size changes on follow-up images...
May 3, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29721578/circumventricular-organs-of-human-brain-visualized-on-post-contrast-3d-fluid-attenuated-inversion-recovery-imaging
#10
Minako Azuma, Toshinori Hirai, Yoshihito Kadota, Zaw Aung Khant, Yohei Hattori, Mika Kitajima, Hiroyuki Uetani, Yasuyuki Yamashita
PURPOSE: Although contrast-enhanced three-dimensional T2 fluid-attenuated inversion recovery (3D T2-FLAIR) images are useful for assessing various neuronal diseases, physiological enhancement of the circumventricular organs on the images have not been investigated. We aimed to assess the physiological appearance of the circumventricular organs on contrast-enhanced 3D T2-FLAIR images. METHODS: We studied 3-T MR images of the brain of 30 individuals with no apparent brain abnormalities...
May 2, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29705876/comparative-study-of-pulsed-continuous-arterial-spin-labeling-and-dynamic-susceptibility-contrast-imaging-by-histogram-analysis-in-evaluation-of-glial-tumors
#11
Atsuko Arisawa, Yoshiyuki Watanabe, Hisashi Tanaka, Hiroto Takahashi, Chisato Matsuo, Takuya Fujiwara, Masahiro Fujiwara, Yasunori Fujimoto, Noriyuki Tomiyama
PURPOSE: Arterial spin labeling (ASL) is a non-invasive perfusion technique that may be an alternative to dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI) for assessment of brain tumors. To our knowledge, there have been no reports on histogram analysis of ASL. The purpose of this study was to determine whether ASL is comparable with DSC-MRI in terms of differentiating high-grade and low-grade gliomas by evaluating the histogram analysis of cerebral blood flow (CBF) in the entire tumor...
April 29, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29682697/mr-skin-signal-loss-effect-artifact
#12
Sven Haller, Michael Burke, Thomas L Mueller
No abstract text is available yet for this article.
April 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29675589/does-stent-type-impact-coil-embolization-outcomes-in-extended-follow-up-of-small-sized-aneurysms-10-mm
#13
Jeongjun Lee, Young Dae Cho, Dong Hyun Yoo, Hyun-Seung Kang, Won-Sang Cho, Jeong Eun Kim, Jusun Moon, Moon Hee Han
PURPOSE: Self-expandable stents have enabled endovascular treatment of wide-necked aneurysms (ordinarily viewed as technically prohibitive), with favorable outcomes. However, the impact of stent type on occlusive stability has not been adequately investigated. In small-sized unruptured saccular aneurysms, we generated estimates of stent-assisted coil embolization outcomes during follow-up monitoring. Stent type and other risk factors linked to recanalization were analyzed. METHODS: A cohort of 286 patients harboring 312 small-sized unruptured aneurysms (< 10 mm) was subjected to mid-term and extended follow-up monitoring after stent-assisted coiling...
April 20, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29656321/multi-center-reproducibility-of-structural-diffusion-tensor-and-resting-state-functional-magnetic-resonance-imaging-measures
#14
S Deprez, Michiel B de Ruiter, S Bogaert, R Peeters, J Belderbos, D De Ruysscher, S Schagen, S Sunaert, P Pullens, E Achten
PURPOSE: The aim of this study is to assess multi-center reproducibility and longitudinal consistency of MRI imaging measurements, as part of a phase III longitudinal multi-center study comparing the neurotoxic effect following prophylactic cranial irradiation with hippocampal avoidance (HA-PCI), in comparison with conventional PCI in patients with small-cell lung cancer. METHODS: Harmonized MRI acquisition protocols from six participating sites and two different vendors were compared using both physical and human phantoms...
April 14, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29654334/brain-morphological-and-microstructural-features-in-cryptogenic-late-onset-temporal-lobe-epilepsy-a-structural-and-diffusion-mri-study
#15
Daichi Sone, Noriko Sato, Yukio Kimura, Yutaka Watanabe, Mitsutoshi Okazaki, Hiroshi Matsuda
PURPOSE: Although epilepsy in the elderly has attracted attention recently, there are few systematic studies of neuroimaging in such patients. In this study, we used structural MRI and diffusion tensor imaging (DTI) to investigate the morphological and microstructural features of the brain in late-onset temporal lobe epilepsy (TLE). METHODS: We recruited patients with TLE and an age of onset > 50 years (late-TLE group) and age- and sex-matched healthy volunteers (control group)...
April 13, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29651500/outcome-of-endovascular-treatment-for-acute-basilar-artery-occlusion-in-the-modern-era-a-single-institution-experience
#16
Chuanhui Li, Wenbo Zhao, Chuanjie Wu, Shuyi Shang, Jian Chen, Ming Ren, Jiangang Duan, Qingfeng Ma, Guilin Li, Yunzhou Zhang, Hongqi Zhang, Liqun Jiao, Xunming Ji
PURPOSE: The beneficial effect of endovascular treatment (EVT) for patients with acute basilar artery occlusion (ABAO) remains uncertain. The purpose of the present study was to evaluate clinical outcome of EVT for patients with ABAO and analyze prognostic factors of good outcome. METHODS: From our prospectively established database, we reviewed all patients with ABAO receiving EVT during January 2014 to December 2016. Baseline characteristics and outcomes were evaluated...
April 12, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29644398/stent-placement-in-patients-with-acute-subarachnoid-haemorrhage-when-is-it-justified
#17
Andrew G Murchison, Victoria Young, Tanja Ddjurdjevic, Martino Cellerini, Rufus Corkill, Wilhelm Küker
PURPOSE: Endovascular stents are widely used for the elective treatment of cerebral aneurysms. Acute stenting is performed in the management of dissections, pseudo-aneurysms, broad-based aneurysms or as a 'bail out' measure after coil migration. The purpose of this study is to review the safety of using stents in acute subarachnoid haemorrhage. METHODS: The stent registry of our institution was reviewed for procedures in patients with acute subarachnoid haemorrhage...
April 11, 2018: Neuroradiology
https://www.readbyqxmd.com/read/29700565/peri-hippocampal-developmental-venous-anomalies-and-memory-loss-more-than-a-normal-variant
#18
LETTER
Sven Haller, Frederik Barkhof
No abstract text is available yet for this article.
June 2018: Neuroradiology
https://www.readbyqxmd.com/read/29666881/pathological-factors-contributing-to-crossed-cerebellar-diaschisis-in-cerebral-gliomas-a-study-combining-perfusion-diffusion-and-structural-mr-imaging
#19
Xiaoxue Liu, Jianrui Li, Qiang Xu, Dante Mantini, Peng Wang, Yuan Xie, Yifei Weng, Chiyuan Ma, Kangjian Sun, Zhiqiang Zhang, Guangming Lu
PURPOSE: To investigate imaging features of crossed cerebellar diaschisis (CCD) in cerebral gliomas, and its underlying pathophysiological mechanisms. METHODS: Thirty-three pre-surgical patients with cerebral gliomas and 33 healthy controls underwent arterial spin-labeling, diffusion tensor imaging, and high-resolution T1-weighted imaging using MRI, in order to estimate cerebral blood flow (CBF), white matter integrity, and lesion volume, respectively. Asymmetry indices of CBF in the cerebellum were used for evaluating the level of CCD in the patients...
June 2018: Neuroradiology
https://www.readbyqxmd.com/read/29523945/comparison-of-cerebral-perfusion-in-perimesencephalic-subarachnoid-hemorrhage-and-aneurysmal-subarachnoid-hemorrhage
#20
Isabel Fragata, Nuno Canto-Moreira, Patrícia Canhão
PURPOSE: Perimesencephalic hemorrhage (PMH) is a benign subtype of nonaneurysmal subarachnoid hemorrhage (SAH). We aimed to investigate if cerebral perfusion in PMH is less affected than in aneurysmal SAH (aSAH). METHODS: From a prospective cohort of 80 patients with spontaneous SAH, we included PMH patients (n = 15) and selected aSAH patients (n = 39) with similar clinical grade at admission (World Federation of Neurosurgeons Scale-WFNS I/II). Computed tomography (CT) perfusion was performed at < 72 h and/or at 8-10 days...
June 2018: Neuroradiology
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