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https://www.readbyqxmd.com/read/29149358/clinically-directed-neuroimaging-of-ophthalmoplegia
#1
REVIEW
Lucia Danieli, Margherita Montali, Luca Remonda, Hanspeter E Killer, Cesare Colosimo, Alessandro Cianfoni
PURPOSE: Ophthalmoplegia (OP) can have numerous etiologies and different clinical presentations. Most causes of OP can be narrowed down to specific anatomical locations based on clinical information. The aim of this study was to outline the different categories of diseases encountered in patients with OP, based on the location along the ocular motor pathways, and the most appropriate imaging modality for the given scenarios. METHODS: Representative neuroimaging examples of pathological processes causing OP are displayed, sequenced by anatomical location and disease category...
November 17, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29134167/postoperative-imaging-findings-associated-with-transpalpebral-craniotomy-approach-to-anterior-cranial-fossa
#2
Dennis Monks, Allison Weyer, Peter Thurlow, Khaled Aziz, Erik Happ, Michael Goldberg
Background and Purpose  The transpalpebral "eyelid" approach is a novel alternative to the traditional ciliary or supraciliary incision for supraorbital frontal craniotomy and access to the anterior cranial fossa. Though a prior publication from our institution has described the surgical approach in detail along with cosmetic and clinical outcomes, postoperative imaging findings have not yet been described. As this surgical technique becomes more widely practiced, it is essential for neuroradiologists, oculoplastic surgeons, and skull base neurosurgeons to be familiar with the expected postoperative imaging findings, especially those that prompt subsequent intervention...
December 2017: Journal of Neurological Surgery. Part B, Skull Base
https://www.readbyqxmd.com/read/29113884/orbital-infantile-hemangioma-and-rhabdomyosarcoma-in-children-differentiation-using-diffusion-weighted-magnetic-resonance-imaging
#3
Stephen F Kralik, Kathryn M Haider, Remy R Lobo, Nucharin Supakul, Sonia F Calloni, Bruno P Soares
PURPOSE: To evaluate differences in magnetic resonance imaging (MRI) appearance between infantile hemangiomas and rhabdomyosarcomas of the orbit in pediatric patients using diffusion-weighted imaging. METHODS: A multicenter retrospective review of MRIs of pediatric patients with infantile hemangiomas and rhabdomyosarcomas of the orbit was performed. MRI examinations from a total of 21 patients with infantile hemangiomas and 12 patients with rhabdomyosarcomas of the orbit were independently reviewed by two subspecialty board-certified neuroradiologists masked to the diagnosis...
November 4, 2017: Journal of AAPOS: the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus
https://www.readbyqxmd.com/read/29112472/clinical-evaluation-of-silent-t1-weighted-mri-and-silent-mr-angiography-of-the-brain
#4
Samantha J Holdsworth, Sarah J Macpherson, Kristen W Yeom, Max Wintermark, Greg Zaharchuk
OBJECTIVE: New MRI sequences based on rapid radial acquisition have reduced gradient noise. The purpose of this study was to compare Silent T1-weighted and unenhanced MR angiography (MRA) against conventional sequences in a clinical population. MATERIALS AND METHODS: The study cohort consisted of 40 patients with suspected brain metastases (median age, 60 years; range, 23-91 years) who underwent T1-weighted contrast-enhanced MRI and 51 patients with suspected vascular lesions or cerebral ischemia (median age, 60 years; range, 16-94 years) who underwent unenhanced intracranial MRA...
November 7, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29101306/diagnostic-accuracy-of-emergency-ct-angiography-for-presumed-tandem-internal-carotid-artery-occlusion-before-acute-endovascular-therapy
#5
Marcelo Rocha, William T Delfyett, Vikas Agarwal, Amin Aghaebrahim, Ashutosh Jadhav, Tudor G Jovin
BACKGROUND: Extracranial internal carotid artery (ICA) occlusion can be overestimated on emergent single phase CT angiography (CTA) of stroke patients with isolated intracranial ICA occlusion. We aimed to measure the ability of identifying the extracranial site of presumed tandem ICA occlusions on pre-procedural CTA relative to catheter angiography during acute endovascular stroke therapy. METHODS: Retrospective study of patients with intracranial ICA occlusion, with or without extracranial ICA occlusion, who underwent single phase CTA before acute endovascular treatment...
November 3, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29073886/ultra-high-field-swi-of-the-substantia-nigra-at-7t-reliability-and-consistency-of-the-swallow-tail-sign
#6
Manuel A Schmidt, Tobias Engelhorn, Franz Marxreiter, Juergen Winkler, Stefan Lang, Stephan Kloska, Philipp Goelitz, Arnd Doerfler
BACKGROUND: The loss of the swallow-tail sign of the substantia nigra has been proposed for diagnosis of Parkinson's disease. Aim was to evaluate, if the sign occurs consistently in healthy subjects and if it can be reliably detected with high-resolution 7T susceptibility weighted imaging (SWI). METHODS: Thirteen healthy adults received SWI at 7T. 3 neuroradiologists, who were blinded to patients' diagnosis, independently classified subjects regarding the swallow-tail sign to be present or absent...
October 26, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29072979/cervical-internal-carotid-occlusion-versus-pseudo-occlusion-at-ct-angiography-in-the-context-of-acute-stroke-an-accuracy-interobserver-and-intraobserver-agreement-study
#7
Ange Diouf, Robert Fahed, Mehdi Gaha, Miguel Chagnon, Naïm Khoury, Marc Kotowski, François Guilbert, David Landry, Jean Raymond, Daniel Roy, Alain Weill
Purpose To evaluate the diagnostic accuracy and reliability of computed tomographic (CT) angiography to distinguish true cervical internal carotid artery (ICA) occlusion from pseudo-occlusion (defined as an isolated intracranial thrombus that impedes ascending blood flow) in the context of acute stroke. Materials and Methods This was a retrospective study of patients who underwent thrombectomy with preprocedural CT angiography that helps to demonstrate a lack of attenuation in the cervical ICA on the symptomatic side (24 men and 13 women; mean age, 63 years; age range, 30-86 years)...
October 25, 2017: Radiology
https://www.readbyqxmd.com/read/29071386/3d-fast-spin-echo-t1%C3%A2-black-blood-imaging-for-the-preoperative-detection-of-venous-sinus-invasion-by-meningioma-comparison-with-contrast-enhanced-mrv
#8
Dongdong Wang, Yiping Lu, Bo Yin, Mingyu Chen, Daoying Geng, Li Liu, Jianbo Wen, Ping Zhong, Yuan Li
OBJECTIVES: To prospectively evaluate the diagnostic value of 3D fast spin-echo (FSE) T1 black-blood magnetic resonance (MR) imaging (3D CUBE T1WI) in comparison with contrast-enhanced MR venography (CE-MRV) in the detection of sinus invasion by meningiomas. METHODS: In this study forty consecutive patients with suspected meningiomas adjacent to venous sinus underwent conventional MR imaging, CE-MRV and 3D CUBE T1WI scans. Images obtained by each technique were assessed independently by two neuroradiologists for (1) wall invasion and (2) lumen occlusion of the target venous sinus...
October 25, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29067502/a-multidisciplinary-approach-for-the-treatment-of-young-patients-with-suprasellar-osteochondroma
#9
Maria Chiara Zanotti, Israel Melamed, Victor Diomin, Eyal Walter, Lior Baraf, Merav Frenkel, Ilan Shelef
BACKGROUND: Osteochondroma is the most common benign bone tumor; intracranial osteochondroma is a very rare finding in the neurosurgical literature and most of them arise from the skull base. CASE REPORT: We report a case of suprasellar ostheocondroma in a 16-year-old female, with its CT and MRI appearances, which caused visual deficits, resolved after surgery. DISCUSSION: To our knowledge, this is the fifth case of osteochondroma affecting the suprasellar region that has been reported, with all the characteristic features of this tumor: optic chiasmal syndrome, intralesional calcifications, cartilage cap, and contrast enhancement...
October 24, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/29064752/improving-clinical-information-on-head-ct-requisitions-from-the-emergency-department-to-aid-interpretation-and-billing-efficiency
#10
Dillon Barron, Thomas Spiegel, Gregory L Katzman, Kateland Haas, Saad Ali
OBJECTIVE: The accuracy of radiologic interpretations is higher when appropriate clinical information is provided, as is the likelihood of reimbursement for the studies. The purpose of this project was to evaluate and improve the quality of clinical information provided on head CT requisitions from an urban emergency department (ED). SUBJECTS AND METHODS: In a prospective study conducted from July 2015 to May 2016, attending neuroradiologists evaluated 1100 randomly selected ED requisitions for unenhanced head CT, grading them for clinical and billing adequacy on a scale of 0-2...
October 24, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29060532/mri-based-objective-ischemic-core-penumbra-quantification-in-adult-clinical-stroke
#11
Anusha Vupputuri, Stephen Ashwal, Bryan Tsao, Elia Haddad, Nirmalya Ghosh
Objective and non-invasive quantification of ischemic stroke and differentiation of salvageable from non-salvageable tissue is critical to treatment planning. However current Magnetic Resonance Imaging(MRI) techniques are time consuming and rely on manual detection methods. Computer aided preliminary screening of the injured tissue could assist neuroradiologists in performing more detailed analysis of the lesion components. An established Hierarchical Region Splitting (HRS) method was extended to segment lesions from adult patients who suffered a clinical stroke using diffusion- and perfusion weighted image (DWI-PWI) maps and associated computed maps...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29055274/comparative-study-of-4d-cta-and-dsa-for-vascular-assessment-in-moyamoya-disease
#12
Bing Tian, Yuanliang Jiang, Qinqin Kang, Bing Xu, Ri Liu, Qi Liu, Jianping Lu
PURPOSE: To evaluate the vascular stenosis and collateral circulation in moyamoya disease using 4D CTA. METHODS: Two neuroradiologists evaluated 4D CTA and DSA for 101 moyamoya patients. The performance of 4D CTA relative to DSA was determined using consistency checks (kappa values, 95% CI) and correlation analysis. RESULTS: The kappa values were 0.714 (modified Suzuki score), 0.846 (Houkin score), 0.594 (basicranial moyamoya vessels), 0.435 (posterior circulation collaterals) and 0...
October 12, 2017: Clinical Imaging
https://www.readbyqxmd.com/read/29050399/diagnostic-criteria-for-chronic-lymphocytic-inflammation-with-pontine-perivascular-enhancement-responsive-to-steroids-clippers
#13
W Oliver Tobin, Yong Guo, Karl N Krecke, Joseph E Parisi, Claudia F Lucchinetti, Sean J Pittock, Jay Mandrekar, Divyanshu Dubey, Jan Debruyne, B Mark Keegan
Chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids (CLIPPERS) is a central nervous system inflammatory syndrome predominantly affecting the brainstem, cerebellum, and spinal cord. Following its initial description, the salient features of CLIPPERS have been confirmed and expanded upon, but the lack of formalized diagnostic criteria has led to reports of patients with dissimilar features purported to have CLIPPERS. We evaluated clinical, radiological and pathological features of patients referred for suspected CLIPPERS and propose diagnostic criteria to discriminate CLIPPERS from non-CLIPPERS aetiologies...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29048405/cooling-in-neonatal-hypoxic-ischemic-encephalopathy-practices-and-opinions-on-minimum-standards-in-the-state-of-california
#14
C J Wusthoff, C L Clark, H C Glass, T K Shimotake, J Schulman, S L Bonifacio
OBJECTIVE: Although hospitals increasingly offer therapeutic hypothermia (TH), there is variable implementation of related services. We assessed current practices and opinions regarding what services should be required of centers providing TH in California. STUDY DESIGN: We surveyed neonatal intensive care unit physicians statewide regarding practices and opinions about services related to TH. RESULTS: Of the 50 participating centers (47% response rate), 66% offer TH...
October 19, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29044753/development-of-a-quantitative-intracranial-vascular-features-extraction-tool-on-3d-mra-using-semiautomated-open-curve-active-contour-vessel-tracing
#15
Li Chen, Mahmud Mossa-Basha, Niranjan Balu, Gador Canton, Jie Sun, Kristi Pimentel, Thomas S Hatsukami, Jenq-Neng Hwang, Chun Yuan
PURPOSE: To develop a quantitative intracranial artery measurement technique to extract comprehensive artery features from time-of-flight MR angiography (MRA). METHODS: By semiautomatically tracing arteries based on an open-curve active contour model in a graphical user interface, 12 basic morphometric features and 16 basic intensity features for each artery were identified. Arteries were then classified as one of 24 types using prediction from a probability model...
October 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29039692/imaging-spectrum-of-immunomodulating-chemotherapeutic-and-radiation-therapy-related-intracranial-effects
#16
Christie M Lincoln, Peter Fata, Susan Sotardi, Michael Pohlen, Tomas Uribe, Jacqueline A Bello
OBJECTIVE: A wide range of treatment-related side effects result in specific neurologic symptoms and signs and neuroimaging features. Even to the most seasoned neuroradiologist, elucidating therapy-related side effects from other common mimics can be challenging. We provide a pictorial survey of some common and uncommon medication-induced and therapy-related neuroimaging manifestations, discuss pathophysiology and common pitfalls in imaging and diagnosis. METHODS: A case-based review is utilized to depict scenarios on a routine basis in a general radiology or neuroradiology practice such as medication-induced posterior reversible encephalopathy syndrome to the more challenging cases of pseudoprogression and pseudoregression in temozolmide and bevacizumab therapy in gliobastoma treatment protocols...
November 3, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29030476/added-value-of-vessel-wall-magnetic-resonance-imaging-for-differentiation-of-nonocclusive-intracranial-vasculopathies
#17
Mahmud Mossa-Basha, Dean K Shibata, Danial K Hallam, Adam de Havenon, Daniel S Hippe, Kyra J Becker, David L Tirschwell, Thomas Hatsukami, Niranjan Balu, Chun Yuan
BACKGROUND AND PURPOSE: Our goal is to determine the added value of intracranial vessel wall magnetic resonance imaging (IVWI) in differentiating nonocclusive vasculopathies compared with luminal imaging alone. METHODS: We retrospectively reviewed images from patients with both luminal and IVWI to identify cases with clinically defined intracranial vasculopathies: atherosclerosis (intracranial atherosclerotic disease), reversible cerebral vasoconstriction syndrome, and inflammatory vasculopathy...
November 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29027857/is-there-added-value-in-obtaining-cervical-spine-mri-in-the-assessment-of-nontraumatic-angiographically-negative-subarachnoid-hemorrhage-a-retrospective-study-and-meta-analysis-of-the-literature
#18
Gelareh Sadigh, Chad A Holder, Jeffrey M Switchenko, Seena Dehkharghani, Jason W Allen
OBJECTIVE Diagnostic algorithms for nontraumatic angiographically negative subarachnoid hemorrhage (AN-SAH) vary, and the optimal method remains subject to debate. This study assessed the added value of cervical spine MRI in identifying a cause for nontraumatic AN-SAH. METHODS Consecutive patients 18 years of age or older who presented with nontraumatic SAH between February 1, 2009, and October 31, 2014, with negative cerebrovascular catheter angiography and subsequent cervical MRI were studied. Patients with intraparenchymal, subdural, or epidural hemorrhage; recent trauma; or known vascular malformations were excluded...
October 13, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28987645/tumefactive-demyelinating-lesions-tdls-a-case-series-of-clinicoradiological-features
#19
Rajendra Singh Jain, Ibraheem Khan, Kapil Kandelwal, Tushar Desai
OBJECTIVE: Diagnosis of tumefactive demyelination lesions (TDLs) is challenging to neurophysician, neuroradiologist or neurosurgeon. Our objective in this study was to analyze clinicoradiological features of TDLs. PATIENTS AND METHOD: A retrospective analysis with prospective follow-up of 11 cases of TDLs was performed. Study was conducted in the neurology department of a tertiary care centre of North-West India from August 2014 to March 2017. MRI of brain and cervical spine with contrast, visual evoked potential, oligoclonal bands, serum anti-AQP4 antibody and MRS performed in most of the patients...
November 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28984520/prediction-of-braf-mutation-status-of-craniopharyngioma-using-magnetic-resonance-imaging-features
#20
Qi Yue, Yang Yu, Zhifeng Shi, Yongfei Wang, Wei Zhu, Zunguo Du, Zhenwei Yao, Liang Chen, Ying Mao
OBJECTIVE Treatment with a BRAF mutation inhibitor might shrink otherwise refractory craniopharyngiomas and is a promising preoperative treatment to facilitate tumor resection. The aim of this study was to investigate the noninvasive diagnosis of BRAF-mutated craniopharyngiomas based on MRI characteristics. METHODS Fifty-two patients with pathologically diagnosed craniopharyngioma were included in this study. Polymerase chain reaction was performed on tumor tissue specimens to detect BRAF and CTNNB1 mutations...
October 6, 2017: Journal of Neurosurgery
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