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Neurovascular imaging

Wataru Jomoto, Masao Tanooka, Hiroshi Doi, Keisuke Kikuchi, Chiemi Mitsuie, Yusuke Yamada, Toru Suzuki, Toshiko Yamano, Reiichi Ishikura, Noriko Kotoura, Shingo Yamamoto
We sought to develop a surgical navigation system using magnetic resonance angiography (MRA) and a three-dimensional (3D) printer for robot-assisted radical prostatectomy (RARP). Six patients with pathologically proven localized prostate cancer were prospectively enrolled in this study. Prostate magnetic resonance imaging (MRI), consisting of T2-weighted sampling perfection with application-optimized contrasts using different flip-angle evolutions (SPACE) and true fast imaging with steady-state precession (true FISP), reconstructed by volume rendering, was followed by dynamic contrast-enhanced MRA performed with a volumetric interpolated breath-hold examination (VIBE) during intravenous bolus injection of gadobutrol...
January 2, 2018: Curēus
Lirong Yan, Collin Y Liu, Koon-Pong Wong, Sung-Cheng Huang, Wendy J Mack, Kay Jann, Giovanni Coppola, John M Ringman, Danny J J Wang
Autosomal dominant Alzheimer's disease (ADAD) is a small subset of Alzheimer's disease that is genetically determined with 100% penetrance. It provides a valuable window into studying the course of pathologic processes that leads to dementia. Arterial spin labeling (ASL) MRI is a potential AD imaging marker that non-invasively measures cerebral perfusion. In this study, we investigated the relationship of cerebral blood flow measured by pseudo-continuous ASL (pCASL) MRI with measures of cerebral metabolism (FDG PET) and amyloid deposition (Pittsburgh Compound B (PiB) PET)...
2018: NeuroImage: Clinical
(no author information available yet)
Arenillas JF, Cortijo E, García-Bermejo P, et al. Relative cerebral blood volume is associated with collateral status and infarct growth in stroke patients in SWIFT PRIME. J Cereb Blood Flow Metab. Epub ahead of print 1 January 2017. DOI: 10.1177/0271678X17740293 . This article was published online with the sixth author, David Liebeskind (Neurovascular Imaging Research Core, Department of Neurology, UCLA, USA), omitted. The full list and order of authors on the article is as follows: Juan F Arenillas, Elisa Cortijo, Pablo García-Bermejo, Elad I Levy, Reza Jahan, David Liebeskind, Mayank Goyal, Jeffrey L Saver and Gregory W Albers Juan F Arenillas's affiliation should have read Neurovascular Research i3 Laboratory, Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas (CSIC), Universidad de Valladolid, Valladolid, Spain...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
Marc Vecchi, Ricardo Pereira Mestre, S Luciamma Thiekalamuriyil, Roberto Cartolari
In the context of painful cranial neuropathies, a very rare cause is represented by the irritation of the glossopharyngeal nerve due to various aetiologic factors. Here, we present a case of neuralgia of the ninth right cranial nerve due to a compression of its nerve root upon the kinking of the homolateral vertebral artery, resulting in a disabling clinical overview for the patient. Our objective was to focus the reader's attention on the clinical manifestation, which alone could lead to an immediate diagnosis...
September 2017: Case Reports in Neurology
Ramazan Jabbarli, Thiemo Florin Dinger, Marvin Darkwah Oppong, Daniela Pierscianek, Philipp Dammann, Karsten H Wrede, Klaus Kaier, Martin Köhrmann, Michael Forsting, Christoph Kleinschnitz, Ulrich Sure
BACKGROUND AND PURPOSE: Multiple intracranial aneurysms (MIAs) are common findings of cerebral angiographies; however, MIA prevalence varies in different patient cohorts. We sought to elucidate risk factors influencing MIA prevalence and the clinical consequences. METHODS: We systematically searched PubMed, Scopus, Embase, and Cochrane Library databases for publications before January 15, 2017, reporting MIA prevalence and risk factors. We used random-effects meta-analysis and multivariate regression analysis to assess the impacts of individual, study, and population characteristics...
March 6, 2018: Stroke; a Journal of Cerebral Circulation
Maxime Gauberti, Antoine P Fournier, Fabian Docagne, Denis Vivien, Sara Martinez de Lizarrondo
Endothelial cells of the central nervous system over-express surface proteins during neurological disorders, either as a cause, or a consequence, of the disease. Since the cerebral vasculature is easily accessible by large contrast-carrying particles, it constitutes a target of choice for molecular magnetic resonance imaging (MRI). In this review, we highlight the most recent advances in molecular MRI of brain endothelial activation and focus on the development of micro-sized particles of iron oxide (MPIO) targeting adhesion molecules including intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), P-Selectin and E-Selectin...
2018: Theranostics
Amanda J Taylor, Jung Hwan Kim, David Ress
A brief (<4 s) period of neural activation evokes a stereotypical sequence of vascular and metabolic events to create the hemodynamic response function (HRF) measured using functional magnetic resonance imaging (fMRI). Linear analysis of fMRI data requires that the HRF be treated as an impulse response, so the character and temporal stability of the HRF are critical issues. Here, a simple audiovisual stimulus combined with a fast-paced task was used to evoke a strong HRF across a majority, ∼77%, of cortex during a single scanning session...
February 28, 2018: NeuroImage
Laura Wanner, Ute Ludwig, Jan-Bernd Hövener, Katja Nelson, Tabea Flügge
OBJECTIVE: Compared with cone beam computed tomography (CBCT), magnetic resonance imaging (MRI) might be superior for the diagnosis of nerve lesions associated with implant placement. STUDY DESIGN: A patient presented with unilateral pain associated with dysesthesia in the region of the right lower lip and chin after implant placement. Conventional orthopantomography could not identify an association between the position of the inferior alveolar nerve and the implant...
January 31, 2018: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
N A Shkumat, M M Shroff, P Muthusami
BACKGROUND AND PURPOSE: The benefit-risk assessment concerning radiation use in pediatric neuroangiography requires an extensive understanding of the doses delivered. This work evaluated the effective dose of 3D rotational angiography in a cohort of pediatric patients with complex neurovascular lesions and directly compared it with conventional 2D-biplane DSA. MATERIALS AND METHODS: Thirty-three 3D rotational angiography acquisitions were acquired in 24 pediatric patients (mean age, 10...
March 1, 2018: AJNR. American Journal of Neuroradiology
Arianna Di Stadio, Roberta Colangeli, Laura Dipietro, Alessandro Martini A, Daniela Parrino, Ennio Nardello, Domenico D' Avella, Elisabetta Zanoletti
BACKGROUND: The use of surgical cochlear nerve decompression is controversial. This study aimed at investigating the safety and validity of microsurgical decompression via an endoscope-assisted retrosigmoid approach to treat tinnitus in patients with neurovascular compression of the cochlear nerve. CASE DESCRIPTION: Three patients with disabling tinnitus due to a loop in the Internal Auditory Canal (IAC) were evaluated with Magnetic Resonance Images (MRI), and tests of Pure Tone Auditory (PTA), Tinnitus, and Auditory Brain Response (ABR) to identify the features of the cochlear nerve involvement...
February 24, 2018: World Neurosurgery
Waleed Brinjikji, J Kevin DeMarco, Robert Shih, Giuseppe Lanzino, Alejandro A Rabinstein, Christopher A Hilditch, Patrick J Nicholson, John Huston
BACKGROUND: Carotid plaque imaging with MRI is becoming more commonplace, but practical challenges exist in performing plaque imaging with surface coils. PURPOSE: To compare the diagnostic performance of a carotid plaque MRI protocol using a standard neurovascular coil (Neurovascular Coil Protocol) to a higher-resolution carotid plaque MRI using carotid surface coils (Surface Coil Protocol) in characterizing carotid plaque. STUDY TYPE: Prospective study comparing two MR techniques in plaque characterization...
February 25, 2018: Journal of Magnetic Resonance Imaging: JMRI
Shujing Yao, Jiashu Zhang, Yining Zhao, Yuanzheng Hou, Xinghua Xu, Zhizhong Zhang, Ron Kikinis, Xiaolei Chen
OBJECTIVE: To address the feasibility and predictive value of multimodal image-based virtual reality in detecting and assessing features of neurovascular confliction (NVC), particularly regarding the detection of offending vessels, degree of compression exerted on the nerve root, in patients who underwent microvascular decompression (MVD) for non-lesional trigeminal neuralgia (TN) and hemi-facial spasm (HFS). METHODS: This prospective study includes 42 consecutive patients who underwent MVD for classic primary TN or HFS...
February 21, 2018: World Neurosurgery
Tharsika Kuganesan, Allen R Huang
BACKGROUND: Giant cell arteritis (GCA) is an immune mediated inflammatory disease of medium and large arteries which afflicts older people. The classical presentation features include: headache, visual disturbances, and jaw claudication. Patients diagnosed with GCA have also been observed to be at higher risk for the subsequent development of strokes. CASE PRESENTATION: We describe a case of an 84-year old right-handed man who presented to hospital with dysarthria, dysphagia, right-sided facial drop, a history of generalized weakness and multiple falls...
February 21, 2018: BMC Geriatrics
Jamal N Shillingford, Joseph L Laratta, Lee A Tan, Nana O Sarpong, James D Lin, Charla R Fischer, Ronald A Lehman, Yongjung J Kim, Lawrence G Lenke
BACKGROUND: Spinopelvic fixation is an integral part of achieving solid fusion across the lumbosacral junction, especially in deformity procedures requiring substantial correction or long-segment constructs. Traditional S2-alar-iliac (S2AI) screw-placement techniques utilize fluoroscopy, increasing operative time and radiation exposure to the patient and surgeon. We describe a novel free-hand technique for S2AI screw placement in patients with adult spinal deformity. METHODS: We reviewed the records of 45 consecutive patients who underwent spinopelvic fixation performed with use of S2AI screws by the senior surgeon and various fellows or residents over a 12-month period (2015 to 2016)...
February 21, 2018: Journal of Bone and Joint Surgery. American Volume
Maryam Anzabi, Maryam Ardalan, Nina K Iversen, Ali H Rafati, Brian Hansen, Leif Østergaard
Despite successful management of ruptured intracranial aneurysm following subarachnoid hemorrhage (SAH), delayed cerebral ischemia (DCI) remains the main cause of high mortality and morbidity in patients who survive the initial bleeding. Astrocytes play a key role in neurovascular coupling. Therefore, changes in the neurovascular unit including astrocytes following SAH may contribute to the development of DCI and long-term complications. In this study, we characterized morphological changes in hippocampal astrocytes following experimental SAH, with special emphasis on glia-vascular cross-talk and hippocampal volume changes...
2018: Frontiers in Cellular Neuroscience
Joan Crespi, Daniel Bratbak, David Dodick, Manjit Matharu, Kent Are Jamtøy, Irina Aschehoug, Erling Tronvik
BACKGROUND: Historical reports describe the sphenopalatine ganglion (SPG) as positioned directly under the nasal mucosa. This is the basis for the topical intranasal administration of local anaesthetic (LA) towards the sphenopalatine foramen (SPF) which is hypothesized to diffuse a distance as short as 1 mm. Nonetheless, the SPG is located in the sphenopalatine fossa, encapsulated in connective tissue, surrounded by fat tissue and separated from the nasal cavity by a bony wall. The sphenopalatine fossa communicates with the nasal cavity through the SPF, which contains neurovascular structures packed with connective tissue and is covered by mucosa in the nasal cavity...
February 13, 2018: Journal of Headache and Pain
Marie Teresa Nawka, Jan Sedlacik, Andreas Frölich, Maxim Bester, Jens Fiehler, Jan-Hendrik Buhk
OBJECTIVE: To evaluate multiparametric MRI including non-contrast and contrast-enhanced morphological and angiographic techniques for intracranial aneurysms treated with the single-layer Woven EndoBridge (WEB) embolization system applying simultaneous digital subtraction angiography (DSA) as the reference of standard. MATERIALS AND METHODS: We retrospectively identified all patients with incidental and acute ruptured intracranial aneurysms treated with a WEB device (WEB SL and WEB SLS) between March 2014 and June 2016 in our neurovascular center with early (within 7 days) postinterventional multiparametric MRI as well as mid-term (5-8 months) follow-up MRI and DSA available...
February 10, 2018: Journal of Neurointerventional Surgery
Lee Goddard, Nils P Brodin, William R Bodner, Madhur Garg, Wolfgang A Tomé
OBJECTIVE: To investigate whether photon or proton based SBRT is the preferred modality for high dose hypofractionation prostate cancer treatment. Achievable dose distributions were compared when uncertainties in target positioning and range uncertainties were appropriately accounted for. METHODS: Ten patients with prostate cancer previously treated at our institution with photon SBRT using volumetric modulated arc therapy (VMAT) were identified. MRI images fused to the treatment planning CT allowed for accurate target and organ-at-risk (OAR) delineation...
February 13, 2018: British Journal of Radiology
Ronak H Jani, Marion A Hughes, Michael S Gold, Barton F Branstetter, Zachary E Ligus, Raymond F Sekula
BACKGROUND: While high-resolution imaging is increasingly used in guiding decisions about surgical interventions for the treatment of trigeminal neuralgia, direct assessment of the extent of vascular contact of the trigeminal nerve is still considered the gold standard for the determination of whether nerve decompression is warranted. OBJECTIVE: To compare intraoperative and magnetic resonance imaging (MRI) findings of the prevalence and severity of vascular compression of the trigeminal nerve in patients without classical trigeminal neuralgia...
February 6, 2018: Neurosurgery
Enrico Giordan, Waleed Brinjikji, Roanna L Vine, Giuseppe Lanzino
BACKGROUND AND PURPOSE: The rate of de novo aneurysm formation in patients with unruptured aneurysm without history of subarachnoid hemorrhage is scarcely defined in literature. We report the incidence of de novo aneurysm formation in a large contemporary series of patients with unruptured intracranial aneurysm (UIA) undergoing serial neurovascular imaging. METHODS: Neurovascular imaging studies of 321 consecutive UIA patients with no prior history of subarachnoid hemorrhage, with at least 3 years of follow-up imaging, were reviewed by a neuroradiologist and a neurosurgeon...
February 7, 2018: Acta Neurochirurgica
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