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Neuroradiology

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https://www.readbyqxmd.com/read/30232518/conventional-diffusion-and-permeability-mr-findings-in-ocular-medulloepithelioma
#1
Paolo Galluzzi, Tommaso Casseri, Alfonso Cerase, Daria Guglielmucci, Paolo Toti, Thedora Hadjistilianou
PURPOSE: To describe the neuroradiological features of intraocular medulloepithelioma. METHODS: We retrospectively analyzed the clinical, histopathological, and MRI data of five children with medulloepithelioma. In addition to conventional images, DWI was performed in four patients and mean ADC was calculated; this was limited to the technique of this cohort of patients. DCE was performed in all patients. This is the first paper that presents diffusion and perfusion characteristics of medulloepithelioma...
September 19, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30232517/radiomics-features-to-distinguish-glioblastoma-from-primary-central-nervous-system-lymphoma-on-multi-parametric-mri
#2
Yikyung Kim, Hwan-Ho Cho, Sung Tae Kim, Hyunjin Park, Dohyun Nam, Doo-Sik Kong
PURPOSE: To determine the feasibility of using high dimensional computer-extracted features, known as radiomics features, in differentiating primary central nervous system lymphoma (PCNSL) from glioblastoma on multi-parametric MR imaging including diffusion-weighted imaging. METHODS: Retrospective evaluation of data was approved by the local ethics committee and informed consent was waived. A total of 143 patients (two independent cohorts for discovery [n = 86; glioblastoma = 49, PCNSL = 37] and validation [n = 57; glioblastoma = 29, PCNSL = 28]) with newly diagnosed glioblastoma and PCNSL were subjected to radiomics analysis using the multi-parametric MRI (contrast-enhanced T1-weighted imaging, T2-weighted imaging, and diffusion-weighted imaging)...
September 19, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30232516/predictive-value-of-flexion-and-extension-diffusion-tensor-imaging-in-the-early-stage-of-cervical-myelopathy
#3
Tomasz Tykocki, Philip English, David Minks, Arunkumar Krishnakumar, Guy Wynne-Jones
PURPOSE: Diffusion tensor imaging (DTI) in flexion (F) and extension (E) may serve as a sensitive diagnostic tool in early symptoms of myelopathy. The aim of this study was to compare values of water diffusion parameters on dynamic cervical DTI in early stage of myelopathy. METHODS: Study enrolled 10 patients with an early stage of cervical myelopathy, in grade I/II of Nurick classification. All subjects were scanned with flexion-extension 3T MRI. Fractional anisotropy (FA), apparent diffusion coefficient (ADC), RD (radial diffusivity), AD (axial diffusivity) and TRACEW (trace diffusion) were measured at C2, compression level (CL) and C7...
September 19, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30219936/value-of-dual-energy-ct-angiography-in-patients-with-treated-intracranial-aneurysms
#4
Iulia Mocanu, Morgane Van Wettere, Julie Absil, Michaël Bruneau, Boris Lubicz, Niloufar Sadeghi
PURPOSE: To evaluate the ability of dual-energy CT angiography (DECTA) in metal artifact reduction in patients with treated intracranial aneurysms by comparing DECTA-based virtual monoenergetic extrapolations (VMEs) and mixed images (MI). METHODS: Thirty-five patients underwent prospectively a dual-source DECTA (Somatom Force, Siemens Medical Solutions, Forchheim, Germany) after aneurysm repair. A total number of 40 aneurysms (23 treated by coil embolization and 17 treated by surgical clipping) were analyzed...
September 15, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30219935/automated-aspect-rating-comparison-between-the-frontier-aspect-score-software-and-the-brainomix-software
#5
Juliane Goebel, Elena Stenzel, Nika Guberina, Isabel Wanke, Martin Koehrmann, Christoph Kleinschnitz, Lale Umutlu, Michael Forsting, Christoph Moenninghoff, Alexander Radbruch
PURPOSE: Computer-aided diagnosis (CAD) appears promising in early ischemic change detection computed tomography (CT). This study aimed to compare the performance of two new CAD systems (Frontier ASPECTS Prototype and Brainomix) with two experienced readers in selected patients with suspected acute ischemic stroke. METHODS: Retrospectively, non-contrast brain CTs of 150 patients suspected for acute middle cerebral artery ischemia were analyzed with respect to ASPECTS first separately, than in consensus by two senior radiologists, and by use of Frontier and Brainomix...
September 15, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30206674/percutaneous-ozone-nucleolysis-for-lumbar-disc-herniation
#6
Mohamed Ezeldin, Marco Leonardi, Ciro Princiotta, Massimo Dall'olio, Mohammed Tharwat, Mohammed Zaki, Mohamed E Abdel-Wanis, Luigi Cirillo
PURPOSE: All percutaneous minimally invasive disc treatments are typically indicated to contained disc herniations. Our study's aim is to evaluate prospectively the efficacy of ozone nucleolysis in the treatment of either contained or uncontained lumbar disc herniations. METHODS: Fifty-two patients, aged 27-87 years, with symptomatic herniated lumbar discs, without migration, sequestration, or severe degenerative disc changes, who failed conservative treatment, were included in our study...
September 11, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30206673/changes-in-the-regional-shape-and-volume-of-subcortical-nuclei-in-patients-with-tinnitus-comorbid-with-mild-hearing-loss
#7
Woo-Suk Tae, Natalia Yakunina, Woo Hyun Lee, Yoon-Jong Ryu, Hyung-Kyu Ham, Sung-Bom Pyun, Eui-Cheol Nam
PURPOSE: Tinnitus, the perception of sound without an external source, is a prevalent disease, but its underlying mechanism has not been fully elucidated. Recent studies have suggested the involvement of subcortical nuclei in tinnitus generation. We investigated changes in the local shape and volume of subcortical nuclei in relation to tinnitus. METHODS: The participants included 53 patients with tinnitus and 52 age- and gender-matched normal controls. Individual 3D T1-weighted structural images were obtained using 3-T magnetic resonance imaging...
September 11, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30203174/usefulness-of-preoperative-three-dimensional-volumetric-analysis-of-carotid-body-tumors
#8
Rodrigo Lozano-Corona, Javier E Anaya-Ayala, Ricardo Martínez-Martínez, Sabsil López-Rocha, Melisa A Rivas-Rojas, Adriana Torres-Machorro, Hugo Laparra-Escareno, Carlos A Hinojosa
PURPOSE: The Shamblin classification is the commonest method to predict complications and outcomes during carotid body tumor (CBT) resection. The aim of this study is to describe the utility of the three-dimensional volumetric reconstruction (3DVR) analysis of the CBT and its relationship with postoperative outcomes. METHODS: Preoperative computed tomography angiography (CTA) was obtained to perform 3DVR of the CBT. Imaging data were analyzed and correlated with surgical outcomes: estimated blood loss (EBL), surgical time (ST), and hospital length of stay (HLOS)...
September 10, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30196373/-hyperdense-artery-sign-in-early-ischemic-stroke-diagnostic-value-of-model-based-reconstruction-approach-in-comparison-with-standard-hybrid-iterative-reconstruction-algorithm
#9
Sophie Lombardi, Luca Riva, Mirko Patassini, Paolo Remida, Cristina Capraro, Francesco Canonico, Cammillo Talei Franzesi, Davide Ippolito
PURPOSE: Hyperdense artery sign is the earliest sign of ischemic stroke on non-enhanced computed tomography and it can be visible long before parenchymal changes. The aim of our study was to compare diagnostic value of model-based iterative reconstruction algorithm (IMR) with that of iterative reconstruction algorithm (iDose4) in identifying hyperdense artery sign. METHODS: We selected 56 consecutive patients suspected for ischemic stroke, who underwent a NCCT and that demonstrated a vessel occlusion at angio-CT or developed ischemic lesion at follow-up CT...
September 8, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30187084/low-rates-of-recanalization-for-wide-necked-aneurysms-treated-with-stenting-after-balloon-assisted-coiling-combination-of-techniques-delivers-stable-and-improved-results-during-follow-up
#10
Aglaé Velasco González, P Stracke, H Nordmeyer, M Heddier, S Saleme, C Sauerland, S Berkemeyer, B Buerke, W Heindel, R Chapot
PURPOSE: In the treatment of wide-necked aneurysms, stenting may be required after balloon-assisted coiling (BAC) for reconstructing the lumen/flow of the parent artery in cases of coil herniation. The potential benefits and complications of both techniques remain unclear when used together. Our aim was to assess the safety and long-term angiographic outcomes of stenting after BAC. METHODS: Retrospective review of 87 unruptured wide necked aneurysms (in 80 patients) treated with BAC and requiring stent placement at the final stage of the procedure due to coil prolapse...
September 5, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30159629/disrupted-local-neural-activity-and-functional-connectivity-in-subjective-tinnitus-patients-evidence-from-resting-state-fmri-study
#11
Qi Han, Yang Zhang, Daihong Liu, Yao Wang, Yajin Feng, Xuntao Yin, Jian Wang
PURPOSE: The study aimed to investigate the abnormal alterations of both the intra-regional brain activity and inter-regional functional connectivity (FC) in patients with subjective tinnitus (ST) using resting-state functional MRI (rs-fMRI) methods. METHODS: Twenty-five ST patients and 25 normal controls (NCs) were included and underwent resting-state functional magnetic resonance imaging scans. ReHo, fALFF, and seed-based FC were calculated and compared between ST patients and NCs...
August 29, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30143820/single-energy-metal-artifact-reduction-technique-for-reducing-metallic-coil-artifacts-on-post-interventional-cerebral-ct-and-ct-angiography
#12
Masaki Katsura, Jiro Sato, Masaaki Akahane, Taku Tajima, Toshihiro Furuta, Harushi Mori, Osamu Abe
PURPOSE: To evaluate the effects of the single-energy metal artifact reduction (SEMAR) algorithm on image quality of cerebral CT and CT angiography (CTA) for patients who underwent intracranial aneurysm coiling. METHODS: Twenty patients underwent cerebral CT and CTA using a 320-detector row CT after intracranial aneurysm coiling. Images with and without application of the SEMAR algorithm (SEMAR CT and standard CT images, respectively) were reconstructed for each patient...
August 24, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30136120/combination-of-ct-angiography-and-mri-in-surgical-planning-of-deep-brain-stimulation
#13
Marie T Krüger, Volker A Coenen, Carolin Jenkner, Horst Urbach, Karl Egger, Peter C Reinacher
PURPOSE: For safe deep brain stimulation (DBS) planning, an accurate visualization and localization of vessels is mandatory. Contrast enhanced (ce) MRI depicts both arteries and veins. Computed tomography angiography (CTA) detects arteries with high geometric accuracy. We routinely combine both modalities for DBS planning. METHODS: A total of 222 trajectories in a consecutive series of 113 patients who underwent DBS operations were included. In all trajectories, the number of veins and arteries in a 10-mm diameter around the planned trajectory were counted in a ceMRI and a CTA...
August 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30136119/diffusion-tensor-imaging-of-the-optic-disc-in-idiopathic-intracranial-hypertension
#14
Ahmed Abdel Khalek Abdel Razek, Nihal Batouty, Wesam Fathy, Rania Bassiouny
PURPOSE: To study optic disc in idiopathic intracranial hypertension (IIH) with diffusion tensor imaging. METHODS: Prospective study was carried out on 31 consecutive patients with IIH and 17 age and sex-matched controls that underwent diffusion tensor imaging of optic nerve. Fractional anisotropy (FA) and mean diffusivity (MD) of optic disc were measured by two readers. Grades of papilledema and visual field defects were evaluated by ophthalmologist. RESULTS: FA of optic disc was significantly lower in IIH than controls (p = 0...
August 22, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30128599/gadolinium-effect-on-thalamus-and-whole-brain-tissue-segmentation
#15
Salem Hannoun, Marwa Baalbaki, Ribal Haddad, Stephanie Saaybi, Nabil K El Ayoubi, Bassem I Yamout, Samia J Khoury, Roula Hourani
PURPOSE: Gadolinium-based contrast agent (GBCA) effect on automated segmentation algorithms of subcortical gray matter (GM) is not fully known. The aim of this study is to determine gadolinium effect on the segmentation of the thalamus and whole brain tissue using different automated segmentation techniques. METHODS: Eighty-four multiple sclerosis (MS) patients underwent an MRI acquisition of two 3DT1-weighted sequences with and without gadolinium injection among which 10 were excluded after image quality check...
August 21, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30128598/incidental-findings-on-cervical-spine-computed-tomography-scans-overlooked-and-unimportant
#16
Elham Beheshtian, Sadaf Sahraian, David M Yousem, Majid K Khan
PURPOSE: Imaging of the cervical spine for trauma or degenerative disease includes multiple areas of the head and neck that may harbor incidental findings. We sought to determine the incidence of common "incidentalomas" on cervical spine CT scans, their importance, and how often these lesions are mentioned in reports. METHODS: We retrospectively reviewed the cervical spine CTs and reports of all patients scanned between October 2017 and January 2018 for Tornwaldt cysts (TC), thyroglossal duct cysts and remnants (TGDC), laryngoceles (LC), pharyngoceles (PC), carotid artery calcified stenosis (CACS), and aberrant right subclavian arteries (ARSA)...
August 21, 2018: Neuroradiology
https://www.readbyqxmd.com/read/30218138/the-47th-annual-meeting-of-the-japanese-society-of-neuroradiology-16-17-february-2018-tsukuba-japan
#17
(no author information available yet)
No abstract text is available yet for this article.
October 2018: Neuroradiology
https://www.readbyqxmd.com/read/30155642/developmental-venous-anomaly-depicted-incidentally-in-fetal-mri-and-confirmed-in-post-natal-mri
#18
LETTER
Ana Filipa Geraldo, Mónica Melo, David Monteiro, Francisco Valente, Joana Nunes
No abstract text is available yet for this article.
October 2018: Neuroradiology
https://www.readbyqxmd.com/read/30136121/carotid-artery-stenting-with-proximal-embolic-protection-via-the-transbrachial-approach-sheathless-navigation-of-a-9-f-balloon-guiding-catheter
#19
Junpei Koge, Tomonori Iwata, Tetsuya Hashimoto, Shigehisa Mizuta, Yukihiko Nakamura, Eri Tanaka, Masakazu Kawajiri, Shun-Ichi Matsumoto, Takeshi Yamada
PURPOSE: Transbrachial carotid artery stenting (TB-CAS) is performed as an alternative procedure for patients with hostile vascular anatomy of the aortic arch and aortic or peripheral artery disease. Proximal protection during TB-CAS is not generally feasible because a small size of the brachial artery may preclude using a large-diameter sheath introducer. We, herein present a novel method that enables proximal protection during TB-CAS by sheathless navigation of a 9-F balloon-guiding catheter equivalent to a 7-F sheath...
October 2018: Neuroradiology
https://www.readbyqxmd.com/read/30132019/combined-aspiration-thrombectomy-and-continuous-intrasinus-thrombolysis-for-cerebral-venous-sinus-thrombosis-technical-note-and-case-series
#20
Anderson Chun On Tsang, A C Hwang, R H Y Chiu, D Y C Chan, F C P Tsang, W S Ho, R Lee, G K K Leung, W M Lui
Cerebral venous sinus thrombosis is an uncommon cause of stroke with high morbidity and mortality rates from venous infarction, intracranial hemorrhage, and extensive cerebral edema. Endovascular treatment with various devices has been proposed as a salvage treatment when standard medical treatment with systemic anticoagulation is ineffective, especially in long segment dural sinus thrombosis. We describe our technique of transvenous endovascular aspiration thrombectomy with large bore thrombectomy catheters, followed by placement of microcatheter for local thrombolytic infusion at the site of thrombosis...
October 2018: Neuroradiology
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