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https://www.readbyqxmd.com/read/29332036/relationships-between-lower-olfaction-and-brain-white-matter-lesions-in-elderly-subjects-with-mild-cognitive-impairment
#1
Juliette Heinrich, Jean-Sébastien Vidal, Axelle Simon, Anne-Sophie Rigaud, Olivier Hanon, Jacques Epelbaum, Cecile Viollet, Emmanuelle Duron
BACKGROUND: Olfactory impairment is reported in mild cognitive impairment (MCI) and Alzheimer's disease (AD) and is associated with hippocampal atrophy. In elderly people, dementia with AD neuropathology and white matter lesions (WML) is common. In this context, olfactory impairment could also depend on the presence of WML. OBJECTIVE: To assess the cross-sectional relationship between olfaction and WML in elderly subjects with MCI. METHODS: Consecutive subjects, >65 years old, diagnosed as MCI after a comprehensive neuropsychological assessment in an expert memory center, with a brain MRI performed within a year and without major depressive state, were included...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29329733/association-between-leukoaraiosis-and-cerebral-blood-flow-territory-alteration-in-asymptomatic-internal-carotid-artery-stenosis
#2
Y-F Chen, Y-S Kuo, W-C Wu, S-C Tang, S-F Jiang
AIM: To test the hypothesis that leukoaraiosis (also known as white matter lesion) is associated with cerebral blood flow territory change as revealed by territorial arterial spin-labeling (TASL) magnetic resonance imaging (MRI) in patients with asymptomatic internal carotid artery stenosis (aICAS). MATERIALS AND METHODS: The institutional review board approved this study. Thirty-three patients with aICAS were included prospectively and divided into high-grade (ultrasonographic stenosis ≥70%, n=17) and low-grade (n=16) groups; 16 healthy subjects were also included...
January 9, 2018: Clinical Radiology
https://www.readbyqxmd.com/read/29327668/impact-of-3-tesla-mri-on-interobserver-agreement-in-clinically-isolated-syndrome-a-magnims-multicentre-study
#3
Marloes Hj Hagens, Jessica Burggraaff, Iris D Kilsdonk, Serena Ruggieri, Sara Collorone, Rosa Cortese, Niamh Cawley, Emilia Sbardella, Michaela Andelova, Michael Amann, Johanna M Lieb, Patrizia Pantano, Birgit I Lissenberg-Witte, Joep Killestein, Celia Oreja-Guevara, Jens Wuerfel, Olga Ciccarelli, Claudio Gasperini, Carsten Lukas, Alex Rovira, Frederik Barkhof, Mike P Wattjes
BACKGROUND: Compared to 1.5 T, 3 T magnetic resonance imaging (MRI) increases signal-to-noise ratio leading to improved image quality. However, its clinical relevance in clinically isolated syndrome suggestive of multiple sclerosis remains uncertain. OBJECTIVES: The purpose of this study was to investigate how 3 T MRI affects the agreement between raters on lesion detection and diagnosis. METHODS: We selected 30 patients and 10 healthy controls from our ongoing prospective multicentre cohort...
January 1, 2018: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29325959/agreement-between-extent-of-meningioma-resection-based-on-the-surgical-simpson-grade-and-based-on-postoperative-mri-findings
#4
K Mariam Slot, Dagmar Verbaan, Lisette Bosscher, Esther Sanchez, W Peter Vandertop, Saskia M Peerdeman
BACKGROUND: and Purpose: The surgical Simpson Grade, introduced in 1957 is the standard measure for meningioma resection and prediction of recurrences. We used an MR-based grading system for the radiological extent of resection, and assessed agreement of the extent of resection between the surgical Simpson Grade and the MR-based scale. MATERIALS AND METHODS: Patients were prospectively included during a two-year period. Immediately after surgery the surgeon determined the Simpson Grade...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29309735/diagnostic-accuracy-of-simulated-low-dose-perfusion-ct-to-detect-cerebral-perfusion-impairment-after-aneurysmal-subarachnoid-hemorrhage-a-retrospective-analysis
#5
Saif Afat, Carolin Brockmann, Omid Nikoubashman, Marguerite Müller, Kolja M Thierfelder, Marc A Brockmann, Konstantin Nikolaou, Martin Wiesmann, Jong Hyo Kim, Ahmed E Othman
Purpose To evaluate diagnostic accuracy of low-dose volume perfusion (VP) computed tomography (CT) compared with original VP CT regarding the detection of cerebral perfusion impairment after aneurysmal subarachnoid hemorrhage. Materials and Methods In this retrospective study, 85 patients (mean age, 59.6 years; 62 women) with aneurysmal subarachnoid hemorrhage and who were suspected of having cerebral vasospasm at unenhanced CT and VP CT (tube voltage, 80 kVp; tube current-time product, 180 mAs) were included, 37 of whom underwent digital subtraction angiography (DSA) within 6 hours...
January 8, 2018: Radiology
https://www.readbyqxmd.com/read/29307078/summary-of-the-italian-inter-society-recommendations-for-radiation-protection-optimization-in-interventional-radiology
#6
Gaetano Compagnone, Renato Padovani, Maria Antonietta D'Avanzo, Sveva Grande, Francesco Campanella, Antonella Rosi
OBJECTIVES: A Working Group coordinated by the Italian National Institute of Health (Istituto Superiore di Sanità) and the National Workers Compensation Authority (Istituto Nazionale per l'Assicurazione contro gli Infortuni sul Lavoro, INAIL) and consisting of 11 Italian scientific/professional societies involved in the fluoroscopically guided interventional practices has been established to define recommendations for the optimization of patients and staff radiation protection in interventional radiology...
January 6, 2018: La Radiologia Medica
https://www.readbyqxmd.com/read/29287023/single-shot-version-of-flair-sequence-in-the-detection-of-intraventricular-anomalies-preliminary-experience-in-fetal-mr-imaging
#7
Giorgia Falanga, Marco Moscatelli, Giana Izzo, Cecilia Parazzini, Chiara Doneda, Andrea Righini
OBJECTIVE: To evaluate single-shot (ss) FLAIR sequence in the detection of intraventricular anomalies in a series of fetuses showing mild-moderate ventriculomegaly at ultrasound. SUBJECTS AND METHODS: Fetuses with mild-moderate isolated ventriculomegaly, which underwent MR imaging between 2003 and 2014 were considered eligible. Fetuses were examined by standard MR protocol and ss-FLAIR sequence, tailored for snapshot imaging. Two paediatric neuroradiologists evaluated MR images...
December 28, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/29282815/prevalence-of-and-risk-factors-for-cerebral-microbleeds-among-adult-patients-with-haemophilia-a-or-b
#8
H Husseinzadeh, T Chiasakul, P A Gimotty, B Pukenas, R Wolf, M Kelty, E Chiang, P F Fogarty, A Cuker
INTRODUCTION: Cerebral microbleeds (CMBs) represent clinically silent haemorrhagic events. Cerebral microbleeds (CMBs) portend negative neurovascular and cognitive outcomes in the general population and are associated with cognitive impairment in persons with haemophilia (PWH). Prevalence, patterns, and risk factors for CMBs in PWH have not been directly compared to persons without coagulopathy. AIM: To examine prevalence, patterns, and risk factors for CMBs in PWH vs normal controls...
December 28, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29274050/the-first-ct-scan-of-the-brain-entering-the-neurologic-information-age
#9
Eelco F M Wijdicks
Computed tomography (CT) scan of the brain transitioned clinical neurology from the educated-guess world to the real computer-age world. One of the first CT scans-published by the British neuroradiologist James Ambrose-showed an intracranial hemorrhage and also suggested the use of iodine to demonstrate abnormal blood-brain barrier. In the USA, CT scans were rapidly commercialized and first placed at Mayo Clinic and Massachusetts General Hospital in the summer of 1973. CT scanning of the brain has revolutionized diagnostic acute neurology and neurosurgery and was the overture to an even larger revolution-magnetic resonance imaging...
December 22, 2017: Neurocritical Care
https://www.readbyqxmd.com/read/29273441/mri-screening-of-the-internal-auditory-canal-is-gadolinium-necessary-to-detect-intralabyrinthine-schwannomas
#10
Johnathan C Valesano, Carrie M Carr, Laurence J Eckel, Matthew L Carlson, John I Lane
OBJECTIVE: Non-contrast MRI of the internal auditory canal (IAC) using high-resolution T2WI (T2 weighted image) has been proposed as the primary screening study in patients with sudden or asymmetric sensorineural hearing loss (ASNHL). However, there are concerns that non-contrast MRI may not detect labyrinthine pathology, specifically intralabyrinthine schwannomas (ILSs). The purpose of this study was to determine if non-contrast high-resolution T2WI alone are adequate to exclude these uncommon intralabyrinthine tumors...
December 13, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29250028/the-structural-imaging-characteristics-and-its-clinical-relevance-in-patients-with-cerebral-venous-thrombosis-a-retrospective-analysis-from-one-single-center-in-china
#11
Li-Xin Zhou, Ming Yao, Li-Ying Cui, Ming-Li Li, Yi-Cheng Zhu, Jun Ni, Bin Peng
Background: Few studies have investigated structural imaging findings of cerebral venous thrombosis (CVT) in China. The structural imaging [head computed tomography (CT) and routine brain magnetic resonance imaging (MRI)] can assess any parenchymal lesion secondary to the venous thrombosis and reveal direct signs of intraluminal thrombus. In recent years, many patients can be diagnosed with CVT more rapidly and directly by structural imaging. The aim of the present study is to determine the performance of structural imaging in the diagnosis and outcome of CVT in a large cohort single center of Chinese patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29244126/silent-cerebral-small-vessel-disease-twice-as-prevalent-in-middle-aged-well-controlled-cart-treated-hiv-infected-individuals-than-hiv-uninfected-individuals
#12
Antoine Moulignier, Julien Savatovsky, Lambert Assoumou, François-Xavier Lescure, Cédric Lamirel, Ophelia Godin, Nadia Valin, Roland Tubiana, Ana Canestri, Pascal Roux, Jean-Claude Sadik, Laurence Salomon, Marie Abrivard, Christine Katlama, Yazdan Yazdanpanah, Gilles Pialoux, Pierre-Marie Girard, Dominique Costagliola
Background: Silent cerebral small-vessel disease (CSVD) is defined as white matter hyperintensities, silent brain infarction or microbleeds. CSVD is responsible for future vascular events, cognitive impairment, frailty and shorter survival. CSVD prevalence among middle-aged persons living with well-controlled HIV infection (PLHIVs) is unknown. Methods: ANRS EP51 MicroBREAK (NCT02082574) is a cross-sectional study with prospective enrollment of treated PLHIVs, ≥50 years old with viral load controlled for ≥12 months, and frequency age- and sex-matched HIV-uninfected controls (HUCs)...
December 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29240310/diagnostic-accuracy-of-high-resolution-t2-weighted-mri-versus-contrast-enhanced-t1-weighted-mri-to-screen-for-cerebellopontine-angle-lesions-in-symptomatic-patients
#13
Mayke A Hentschel, Henricus P M Kunst, Maroeska M Rovers, Stefan C A Steens
OBJECTIVE: To evaluate diagnostic accuracy of high resolution T2-weighted MRI (T2w) for detecting cerebellopontine angle (CPA) lesions compared to a combined protocol including gadolinium enhanced T1-weighted MRI (GdT1w). SETTING: Department of Radiology & Nuclear Medicine, Radboud University Medical Centre, Nijmegen, the Netherlands. PARTICIPANTS: A random sample of MRIs from 350 patients (700 CPAs) with asymmetrical audiovestibular complaints was used, acquired between 2013-2016...
December 14, 2017: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29232026/noncontrast-enhanced-time-resolved-4d-dynamic-intracranial-mr-angiography-at-7t-a-feasibility-study
#14
Fei Cong, Yan Zhuo, Songlin Yu, Xianchang Zhang, Xinyuan Miao, Jing An, Shuo Wang, Yong Cao, Yan Zhang, Hee Kwon Song, Danny Jj Wang, Lirong Yan
BACKGROUND: Arterial spin labeling (ASL) based-noncontrast-enhanced 4D MR angiography (NCE 4D MRA) shows potential in characterizing cerebrovascular hemodynamics in cerebrovascular disorders. Ultrahigh-field theoretically benefits ASL signal with increased inherent signal-to-noise ratio (SNR) and prolonged blood T1 , which may provide improved delineation of vasculature in 4D MRA. PURPOSE: To investigate the feasibility of NCE 4D MRA using 3D Cartesian trajectory and stack-of-stars (SOS) golden angle radial trajectory at 7T...
December 12, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29226091/successful-treatment-of-multicompartmental-cerebral-ventriculitis-caused-by-acinetobacter-baumanii
#15
Mahableshwar Albur
We present a case report of a 58-year- old woman with subarachnoid haemorrhage complicated by non-communicating hydrocephalus. During the course of her neurosurgical management, she developed external-ventricular drain associated ventriculitis which in turn was complicated by lack of communication between third and fourth ventricles. The causative organism was a fully-sensitive Acinetobacter baumanii, a nosocomial pathogen often associated with complicated treatment regimens and poor outcomes. This patient was successfully managed by a multi-disciplinary team involving neurosurgeons, neuroradiologists and infection specialists...
2018: IDCases
https://www.readbyqxmd.com/read/29225924/ct-dental-artifact-comparison-of-an-iterative-metal-artifact-reduction-technique-with-weighted-filtered-back-projection
#16
Felix E Diehn, Gregory J Michalak, David R DeLone, Amy L Kotsenas, E Paul Lindell, Norbert G Campeau, Ahmed F Halaweish, Cynthia H McCollough, Joel G Fletcher
Background: Dental hardware produces streak artifacts on computed tomography (CT) images reconstructed with the standard weighted filtered back projection (wFBP) method. Purpose: To perform a preliminary evaluation of an iterative metal artifact reduction (IMAR) technique to assess its ability to improve anatomic visualization over wFBP in patients with dental amalgam or other hardware. Material and Methods: CT images from patients with dental hardware were reconstructed using wFBP and IMAR software and soft-tissue or bone window/level settings...
November 2017: Acta Radiologica Open
https://www.readbyqxmd.com/read/29218615/advanced-ct-for-diagnosis-of-seizure-related-stroke-mimics
#17
Friederike Austein, Monika Huhndorf, Johannes Meyne, Helmut Laufs, Olav Jansen, Thomas Lindner
BACKGROUND AND PURPOSE: It is assumed that up to 30 % of clinically diagnosed acute ischaemic strokes (AIS) are actually stroke mimics (SM). Our aim was to evaluate the usefulness of advanced CT including CT angiography (CTA) and CT perfusion (CTP) findings when distinguishing AIS from seizure-related SM. METHODS: Over a 22-month period data were gathered of patients who presented to our stroke centre with AIS-like symptoms and were examined immediately with an advanced CT, analysed and evaluated by two experienced neuroradiologists who preferred SM rather than AIS...
December 7, 2017: European Radiology
https://www.readbyqxmd.com/read/29217743/dural-arteriovenous-fistulas-a-characteristic-pattern-of-edema-and-enhancement-of-the-medulla-on-mri
#18
A Z Copelan, A Krishnan, H Marin, R Silbergleit
Medullary edema with enhancement is rarely reported at initial MR imaging in intracranial dural arteriovenous fistulas. We report a series of 5 patients with dural arteriovenous fistulas, all of whom demonstrated a characteristic pattern of central medullary edema and medullary enhancement at initial MR imaging. Cognard type V dural arteriovenous fistula, defined by drainage into the perimedullary veins and the veins surrounding the brain stem, is a rare yet well-described pathologic entity. Even more rarely reported, however, is its clinical presentation with predominantly bulbar symptoms and MR imaging findings of central medullary edema with enhancement...
December 7, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29217497/prevalence-of-hyperdense-paraspinal-vein-sign-in-patients-with-spontaneous-intracranial-hypotension-without-dural-csf-leak-on-standard-ct-myelography
#19
Michael S Clark, Felix E Diehn, Jared T Verdoorn, Vance T Lehman, Greta B Liebo, Jonathan M Morris, Kent R Thielen, John T Wald, Neeraj Kumar, Patrick H Luetmer
PURPOSE: A recently identified and treatable cause of spontaneous intracranial hypotension (SIH) is cerebrospinal fluid (CSF)-venous fistula, and a recently described computed tomography myelogram (CTM) finding highly compatible with but not diagnostic of this entity is the hyperdense paraspinal vein sign. We aimed to retrospectively measure the prevalence of the hyperdense paraspinal vein sign on CTMs in SIH patients without dural CSF leak, in comparison with control groups. METHODS: Three CTM groups were identified: 1) SIH study group, which included dural CSF leak-negative standard CTMs performed for SIH, with early and delayed imaging; 2) Early control CTMs, which were performed for indications other than SIH, with imaging shortly after intrathecal contrast administration; 3) Delayed control CTMs, which included delayed imaging...
December 7, 2017: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
https://www.readbyqxmd.com/read/29205669/prospective-analysis-of-serious-cardiorespiratory-events-in-children-during-ophthalmic-artery-chemotherapy-for-retinoblastoma-under-a-deep-standardized-anesthesia
#20
Marie-Claire Nghe, Anne Godier, Anoushée Shaffii, Isabelle Leblanc, Hervé Picard, Raphaël Blanc, Livia Lumbroso-Le Rouic, Jean-Michel Devys
BACKGROUND AND OBJECTIVE: Serious adverse cardiorespiratory events complicate super selective ophthalmic artery chemotherapy for retinoblastoma in anesthetized children. Their mechanism remains unclear but may be attributed to an autonomic nervous reflex induced by the catheter close to the ophthalmic artery. Inadequate depth of anesthesia during catheter stimulation might be an aggravating factor. Thus, we tested whether deep general anesthesia reduced the incidence of serious cardiorespiratory events...
December 5, 2017: Paediatric Anaesthesia
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