keyword
MENU ▼
Read by QxMD icon Read
search

neuroradiologist

keyword
https://www.readbyqxmd.com/read/28923240/national-survey-on-perioperative-anaesthetic-management-in-the-endovascular-treatment-of-acute-ischaemic-stroke
#1
O Romero Kräuchi, L Valencia, F Iturri, A Mariscal Ortega, A López Gómez, R Valero
OBJECTIVE: To assess the anaesthetic management of treatment for endovascular acute ischaemic stroke (AIS) in Spain. MATERIALS AND METHOD: A survey was designed by the SEDAR Neuroscience Section and sent to the Spanish anaesthesiology departments with a primary stroke centre between July and November 2016. RESULTS: Of the 47 hospitals where endovascular treatment of AIS is performed, 37 anaesthesiology departments participated. Thirty responses were obtained; three of which were eliminated due to duplication (response rate of 72...
September 15, 2017: Revista Española de Anestesiología y Reanimación
https://www.readbyqxmd.com/read/28918386/evaluation-of-previously-embolized-intracranial-aneurysms-inter-and-intra-rater-reliability-among-neurosurgeons-and-interventional-neuroradiologists
#2
Scott L Zuckerman, Nikita Lakomkin, Jordan A Magarik, Jan Vargas, Marcus Stephens, Babatunde Akinpelu, Alejandro M Spiotta, Azam Ahmed, Adam S Arthur, David Fiorella, Ricardo Hanel, Joshua A Hirsch, Ferdinand K Hui, Robert F James, David F Kallmes, Philip M Meyers, David B Niemann, Peter Rasmussen, Raymond D Turner, Babu G Welch, J Mocco
BACKGROUND: The angiographic evaluation of previously coiled aneurysms can be difficult yet remains critical for determining re-treatment. OBJECTIVE: The main objective of this study was to determine the inter-rater reliability for both the Raymond Scale and per cent embolization among a group of neurointerventionalists evaluating previously embolized aneurysms. METHODS: A panel of 15 neurointerventionalists examined 92 distinct cases of immediate post-coil embolization and 1 year post-embolization angiographs...
September 16, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28913611/prospective-intraindividual-comparison-of-gadoterate-and-gadobutrol-for-cervical-and-intracranial-contrast-enhanced-magnetic-resonance-angiography
#3
Philip Hoelter, Stefan Lang, Marina Weibart, Manuel Schmidt, Michael F X Knott, Tobias Engelhorn, Marco Essig, Stephan Kloska, Arnd Doerfler
PURPOSE: Gadobutrol (GB) is reported to provide improved relaxivity and concentration compared to gadoterate (GT). This study was designed to intraindividually compare quantitative and qualitative enhancement characteristics of GB to GT in cervicocranial magnetic resonance angiography (MRA) of patients with cerebrovascular disease (CVD). METHODS: Patients (n = 54) with CVD underwent two identical contrast-enhanced magnetic resonance angiography (CE-MRA) examinations of the cervical and intracranial vasculature in randomized order, using GB and GT in equimolar dose...
September 14, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28913326/improvement-in-white-matter-tract-reconstruction-with-constrained-spherical-deconvolution-and-track-density-mapping-in-low-angular-resolution-data-a-pediatric-study-and-literature-review
#4
Benedetta Toselli, Domenico Tortora, Mariasavina Severino, Gabriele Arnulfo, Andrea Canessa, Giovanni Morana, Andrea Rossi, Marco Massimo Fato
INTRODUCTION: Diffusion-weighted magnetic resonance imaging (DW-MRI) allows noninvasive investigation of brain structure in vivo. Diffusion tensor imaging (DTI) is a frequently used application of DW-MRI that assumes a single main diffusion direction per voxel, and is therefore not well suited for reconstructing crossing fiber tracts. Among the solutions developed to overcome this problem, constrained spherical deconvolution with probabilistic tractography (CSD-PT) has provided superior quality results in clinical settings on adult subjects; however, it requires particular acquisition parameters and long sequences, which may limit clinical usage in the pediatric age group...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28912284/t1-weighted-dynamic-contrast-enhanced-mr-perfusion-imaging-characterizes-tumor-response-to-radiation-therapy-in-chordoma
#5
P Santos, K K Peck, J Arevalo-Perez, S Karimi, E Lis, Y Yamada, A I Holodny, J Lyo
BACKGROUND AND PURPOSE: Chordomas notoriously demonstrate a paucity of changes following radiation therapy on conventional MR imaging. We hypothesized that dynamic contrast-enhanced MR perfusion imaging parameters of chordomas would change significantly following radiation therapy. MATERIALS AND METHODS: Eleven patients with pathology-proved chordoma who completed dynamic contrast-enhanced MR perfusion imaging pre- and postradiation therapy were enrolled. Quantitative tumor measurements were obtained by 2 attending neuroradiologists...
September 14, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28885891/signal-enhancement-of-the-dentate-nucleus-at-unenhanced-mr-imaging-after-very-high-cumulative-doses-of-the-macrocyclic-gadolinium-based-contrast-agent-gadobutrol-an-observational-study
#6
Atle Bjørnerud, Svein Are Sirirud Vatnehol, Christopher Larsson, Paulina Due-Tønnessen, Per Kristian Hol, Inge Rasmus Groote
Purpose To test for measurable visual enhancement of the dentate nucleus (DN) on unenhanced T1-weighted magnetic resonance (MR) images in a cohort of patients with a primary brain tumor who had not received linear gadolinium-based contrast agents (GBCAs) but had received many injections of macrocyclic GBCAs. Materials and Methods Seventeen patients with high-grade gliomas who had received 10-44 administrations of the macrocyclic GBCA gadobutrol (0.1 mmol/kg of body weight) were retrospectively included in this regional ethics committee-approved study...
September 8, 2017: Radiology
https://www.readbyqxmd.com/read/28882862/detection-of-volume-changing-metastatic-brain-tumors-on-longitudinal-mri-using-a-semiautomated-algorithm-based-on-the-jacobian-operator-field
#7
O Shearkhani, A Khademi, A Eilaghi, S-P Hojjat, S P Symons, C Heyn, M Machnowska, A Chan, A Sahgal, P J Maralani
BACKGROUND AND PURPOSE: Accurate follow-up of metastatic brain tumors has important implications for patient prognosis and management. The aim of this study was to develop and evaluate the accuracy of a semiautomated algorithm in detecting growing or shrinking metastatic brain tumors on longitudinal brain MRIs. MATERIALS AND METHODS: We used 50 pairs of successive MR imaging datasets, 30 on 1.5T and 20 on 3T, containing contrast-enhanced 3D T1-weighted sequences...
September 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28875111/carotid-cavernous-fistula-masquerading-as-delayed-suprachoroidal-hemorrhage-after-trabeculectomy
#8
Mukesh Jain, Md Shahid Alam, Bipasha Mukherjee, Rajiv Raman
Objective: Carotid cavernous fistulae (CCFs) are abnormal communications between the cavernous sinus and the carotid arterial system. Based on the etiology, CCFs can be traumatic, spontaneous and rarely iatrogenic. We report an interesting case of new onset CCF associated with shallow choroidal detachment after trabeculectomy surgery. Method: Observational case report Result: A 69-year-old male patient presented with complain of proptosis, congestion, and gross diminution of vision in the left eye following trabeculectomy elsewhere...
2017: GMS Ophthalmology Cases
https://www.readbyqxmd.com/read/28872634/advancing-the-cancer-genome-atlas-glioma-mri-collections-with-expert-segmentation-labels-and-radiomic-features
#9
Spyridon Bakas, Hamed Akbari, Aristeidis Sotiras, Michel Bilello, Martin Rozycki, Justin S Kirby, John B Freymann, Keyvan Farahani, Christos Davatzikos
Gliomas belong to a group of central nervous system tumors, and consist of various sub-regions. Gold standard labeling of these sub-regions in radiographic imaging is essential for both clinical and computational studies, including radiomic and radiogenomic analyses. Towards this end, we release segmentation labels and radiomic features for all pre-operative multimodal magnetic resonance imaging (MRI) (n=243) of the multi-institutional glioma collections of The Cancer Genome Atlas (TCGA), publicly available in The Cancer Imaging Archive (TCIA)...
September 5, 2017: Scientific Data
https://www.readbyqxmd.com/read/28872448/blood-pressure-variability-and-leukoaraiosis-in-acute-ischemic-stroke
#10
David A Dickie, Benjamin Aribisala, Grant Mair, Eivind Berge, Richard I Lindley, Peter Sandercock, Rudiger von Kummer, Anders von Heijne, Andre Peeters, Lesley Cala, Andrew Farrall, Zoe Morris, Nick Bradey, Gillian Potter, Alessandro Adami, Joanna M Wardlaw
Higher blood pressure, blood pressure variability, and leukoaraiosis are risk factors for early adverse events and poor functional outcome after ischemic stroke, but prior studies differed on whether leukoaraiosis was associated with blood pressure variability, including in ischemic stroke. In the Third International Stroke Trial, blood pressure was measured in the acute phase of ischemic stroke immediately prior to randomization, and at 0.5, 1, and 24 h after randomization. Masked neuroradiologists rated index infarct, leukoaraiosis, and atrophy on CT using validated methods...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28871469/imaging-correlates-for-the-2016-update-on-who-classification-of-grade-ii-iii-gliomas-implications-for-idh-1p-19q-and-atrx-status
#11
Rachel L Delfanti, David E Piccioni, Jason Handwerker, Naeim Bahrami, AnithaPriya Krishnan, Roshan Karunamuni, Jona A Hattangadi-Gluth, Tyler M Seibert, Ashwin Srikant, Karra A Jones, Vivian S Snyder, Anders M Dale, Nathan S White, Carrie R McDonald, Nikdokht Farid
The 2016 World Health Organization Classification of Tumors of the Central Nervous System incorporates the use of molecular information into the classification of brain tumors, including grade II and III gliomas, providing new prognostic information that cannot be delineated based on histopathology alone. We hypothesized that these genomic subgroups may also have distinct imaging features. A retrospective single institution study was performed on 40 patients with pathologically proven infiltrating WHO grade II/III gliomas with a pre-treatment MRI and molecular data on IDH, chromosomes 1p/19q and ATRX status...
September 4, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28867322/recurrent-bleeding-after-perimesencephalic-hemorrhage
#12
Frans Kauw, Birgitta K Velthuis, Ufuk Kizilates, Irene C van der Schaaf, Gabriel J E Rinkel, Mervyn D I Vergouwen
BACKGROUND: Perimesencephalic hemorrhage (PMH) is a type of subarachnoid hemorrhage with excellent long-term outcomes. Only one well-documented case of in-hospital rebleeding after PMH is described in the literature, which occurred after initiating antithrombotic treatment because of myocardial ischemia. In this case report we describe a patient with PMH without antithrombotic treatment who had two episodes of recurrent bleeding on the day of ictus. In order to validate the radiological findings we conducted a case-control study...
August 31, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28863201/cervical-artery-dissection-related-to-chiropractic-manipulation-one-institution-s-experience
#13
Kelly A Kennell, Megan M Daghfal, Shyam G Patel, Jeffery R DeSanto, G Scott Waterman, Raymond E Bertino
PURPOSE: The purpose of this study was to determine the frequency of patients seen at a single institution who were diagnosed with a cervical vessel dissection related to chiropractic neck manipulation. METHODS: We identified cases through a retrospective chart review of patients seen between April 2008 and March 2012 who had a diagnosis of cervical artery dissection following a recent chiropractic manipulation. Relevant imaging studies were reviewed by a board-certified neuroradiologist to confirm the findings of a cervical artery dissection and stroke...
September 2017: Journal of Family Practice
https://www.readbyqxmd.com/read/28858894/multiple-sclerosis-improved-detection-of-active-cerebral-lesions-with-3-dimensional-t1-black-blood-magnetic-resonance-imaging-compared-with-conventional-3-dimensional-t1-gre-imaging
#14
Nora N Sommer, Tobias Saam, Eva Coppenrath, Hendrik Kooijman, Tania Kümpfel, Maximilian Patzig, Sebastian E Beyer, Wieland H Sommer, Maximilian F Reiser, Birgit Ertl-Wagner, Karla M Treitl
OBJECTIVES: The aim of this study was to assess the diagnostic accuracy of a modified high-resolution whole-brain three-dimensional T1-weighted black-blood sequence (T1-weighted modified volumetric isotropic turbo spin echo acquisition [T1-mVISTA]) in comparison to a standard three-dimensional T1-weighted magnetization-prepared rapid gradient echo (MP-RAGE) sequence for detection of contrast-enhancing cerebral lesions in patients with relapsing-remitting multiple sclerosis (MS). MATERIALS AND METHODS: After institutional review board approval and informed consent, 22 patients (8 men; aged 31...
August 30, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28854990/the-uniform-cortex-sign-a-diagnostic-sign-of-diffuse-cortical-injury-on-mr-imaging-of-the-brain-at-1-5-t
#15
Andrew Leung, Apurva Patel, Basem Bahakeem, David Pelz, Donald Lee, Manas Sharma
BACKGROUND: To introduce the "uniform cortex sign" (UCS) and evaluate its performance as a diagnostic test for the presence of diffuse cortical injury (DCI). METHODS: The study was approved by our institutional review board. Three experienced neuroradiologists were given a tutorial on the UCS. They were subsequently presented with 14 cases (7 control patients and 7 DCI patients with the UCS) in random order and asked to determine whether the UCS was present. Each case consisted of selected DWI, T2-weighted, and FLAIR images from unenhanced 1...
August 31, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28853674/mr-imaging-based-multimodal-autoidentification-of-perivascular-spaces-mmaps-automated-morphologic-segmentation-of-enlarged-perivascular-spaces-at-clinical-field-strength
#16
Erin L Boespflug, Daniel L Schwartz, David Lahna, Jeffrey Pollock, Jeffrey J Iliff, Jeffrey A Kaye, William Rooney, Lisa C Silbert
Purpose To describe a fully automated segmentation method that yields object-based morphologic estimates of enlarged perivascular spaces (ePVSs) in clinical-field-strength (3.0-T) magnetic resonance (MR) imaging data. Materials and Methods In this HIPAA-compliant study, MR imaging data were obtained with a 3.0-T MR imager in research participants without dementia (mean age, 85.3 years; range, 70.4-101.2 years) who had given written informed consent. This method is built on (a) relative normalized white matter, ventricular and cortical signal intensities within T1-weighted, fluid-attenuated inversion recovery, T2-weighted, and proton density data and (b) morphologic (width, volume, linearity) characterization of each resultant cluster...
August 29, 2017: Radiology
https://www.readbyqxmd.com/read/28838906/the-diagnostic-accuracy-of-contrast-enhanced-ct-of-the-neck-for-the-investigation-of-sialolithiasis
#17
Y M Purcell, R G Kavanagh, A M Cahalane, A G Carroll, S G Khoo, R P Killeen
BACKGROUND AND PURPOSE: Sialolithiasis is a common benign pathology affecting the salivary glands but it is unclear if contrast-enhanced CT, which is commonly used for investigation of head and neck pathology, can identify calculi as accurately as noncontrast CT. The aim of this study was to assess the diagnostic accuracy of contrast-enhanced CT of the neck in the diagnosis of sialolithiasis compared with noncontrast CT of the neck used as the criterion standard. MATERIALS AND METHODS: This was a retrospective, case-control study of 92 consecutive cases in 90 patients who underwent both noncontrast CT of the neck and contrast-enhanced CT of the neck in 2 tertiary referral centers from January 2011 to December 2015 for investigation of sialolithiasis...
August 24, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28831529/diagnosis-of-spinal-dural-arteriovenous-fistula-using-3d-t2-weighted-imaging
#18
Stephen F Kralik, Daniel Murph, Peter Mehta, Darren P O'Neill
PURPOSE: To evaluate spinal MRIs without and with 3D T2W imaging among patients without and with spinal dural arteriovenous fistula (SDAVF) confirmed by spinal digital subtraction angiography (DSA). METHODS: A retrospective case-control study was performed among patients without and with SDAVF who had both spinal MRIs and gold standard spinal DSA. Two neuroradiologists independently reviewed spinal MRIs that were performed with either sagittal T2W turbo spin echo (2D group) or sagittal 3D T2W sampling perfection with application-optimized contrasts using different flip-angle evolutions (SPACE) (3D group) and documented the presence or absence of SDAVF...
August 22, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28814097/prominent-deep-medullary-veins-a-predictive-biomarker-for-stroke-risk-from-transient-ischemic-attack
#19
Yang Duan, Zhihua Xu, Hongyi Li, Xiaonan Cai, Cancan Chang, Benqiang Yang
Background Deep medullary veins (DMVs) are a biomarker of severity and prognosis in patients with acute cerebral infarction. However, their clinical significance remains unclear in patients with transient ischemic attack (TIA). Purpose To determine whether prominent deep medullary veins (PDMVs) are a predictive biomarker for stroke risk after TIA. Material and Methods Clinical and imaging data of 49 patients with TIA and 49 sex- and age-matched controls were studied. PDMVs were defined as DMVs with a score of 3 (TDMVs) or asymmetric DMVs (ADMVs), and the relationship between PDMVs and clinical features was analyzed...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28799861/absence-of-cortical-vein-opacification-is-associated-with-lack-of-intra-arterial-therapy-benefit-in-stroke
#20
Ivo G H Jansen, Annemieke B van Vuuren, Wim H van Zwam, Ido R van den Wijngaard, Olvert A Berkhemer, Hester F Lingsma, Cornelis H Slump, Robert J van Oostenbrugge, Kilian M Treurniet, Diederik W J Dippel, Marianne A A van Walderveen, Aad van der Lugt, Yvo B W E M Roos, Henk A Marquering, Charles B L M Majoie, René van den Berg
Purpose To assess the degree of cortical vein opacification in patients with internal carotid artery or middle cerebral artery (MCA) stroke and to evaluate the relationship with treatment benefit from intra-arterial therapy (IAT). Materials and Methods Written informed consent was obtained from all patients in the Multicenter Randomized Clinical Trial of Endovascular Treatment for Acute Ischemic Stroke in the Netherlands. From the trial's database, all patients (recruited from December 2010 until March 2014) with baseline computed tomographic (CT) angiograms were retrospectively included...
August 11, 2017: Radiology
keyword
keyword
19223
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"