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Neurovascular imaging

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https://www.readbyqxmd.com/read/29161785/intraoperative-mri-for-resection-of-intracranial-meningiomas
#1
Shamik Chakraborty, Salvatore Zavarella, Sussan Salas, Michael Schulder
Objective: To examine whether intraoperative MRI can enhance safety and extent of resection of complex intracranial meningiomas, given its positive role in the resection of malignant brain tumors and pituitary tumors. Methods: Over a ten-year period, 70 operations were performed on 66 patients with intracranial meningiomas using the compact, mobile PoleStar N20 iMRI navigation system. A retrospective review was conducted examining patient demographics, surgical characteristics, and outcomes...
November 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/29146164/magnetic-resonance-imaging-validation-of-tibial-tubercle-transfer-distance-in-the-fulkerson-osteotomy-a-clinical-and-cadaveric-study
#2
Joseph N Liu, Douglas N Mintz, Joseph T Nguyen, Jacqueline M Brady, Sabrina M Strickland, Beth E Shubin Stein
PURPOSE: To validate the medialization and anteriorization distances, and the osteotomy angle of anteromedialization tibial tubercle osteotomies using postoperative axial imaging. METHODS: From March 2004 to August 2015, 117 consecutive patients who underwent anteromedialization osteotomies of the tibial tubercle by a single surgeon were identified. Only patients with pre- and postoperative magnetic resonance imaging (MRI) studies were included. Using MRI multiplanar reformats, distances that the tibial tubercle was translated medially (medialization) and anteriorly (anteriorization) were measured...
November 13, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29143863/morphometric-properties-of-the-latissimus-dorsi-muscle-in-human-fetuses-for-flap-surgery
#3
Orhan Beger, Burhan Beger, Deniz Uzmansel, Semra Erdoğan, Zeliha Kurtoğlu
PURPOSE: Although latissimus dorsi (LD) flaps are extensively used in a wide range of interventions, fetus studies on this subject are quite limited. This study aims to obtain detailed information about the morphometric features of LD, thoracodorsal artery (TDA) and nerve (TDN). METHODS: The study was carried out on both sides of 50 formalin-fixed human fetuses (22 male/28 female) with a mean gestational age of 24.5 ± 4.7 (range 18-36) weeks, which were in the inventory of Anatomy Department of Mersin University Faculty of Medicine...
November 16, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29128994/radiologists-preferences-regarding-content-of-prostate-mri-reports-a-survey-of-the-society-of-abdominal-radiology
#4
Benjamin Spilseth, Daniel J Margolis, Sangeet Ghai, Nayana U Patel, Andrew B Rosenkrantz
PURPOSE: To evaluate radiologist preferences regarding specific content that warrants inclusion in prostate MRI reports. METHODS: Sixty-one members of the Society of Abdominal Radiology responded to a 74-item survey regarding specific content warranted in prostate MRI reports, conducted in August 2016. RESULTS: General items deemed essential report content by ≥ 50% of respondents were prostate volume (80%), extent of prostate hemorrhage (74%), TURP defects (69%), coil type (64%), BPH (61%), contrast dose (61%), contrast agent (59%), medications administered (59%), and magnet strength (54%)...
November 11, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/29124343/anatomical-landmarks-of-mandibular-interforaminal-region-related-to-dental-implant-placement-with-3d-cbct-comparison-between-edentulous-and-dental-mandibles
#5
Elif Sener, Erinc Onem, Gulcan Coskun Akar, Figen Govsa, Mehmet Asim Ozer, Yelda Pinar, Ali Mert, B Guniz Baksi Sen
BACKGROUND: Anterior mandibular (interforaminal) region is important in implant applications as it serves a basis for neurovascular bedding and holds the prosthesis for patients. Treatment planning for dental implant patients is often complicated by the unknown extent of the anterior loop of the neurovascular bundle. Anatomical structures including mandibular incisive canal (MIC) and lingual foramen (LF) should also be examined as part of the detailed analysis for their neurovascular structures...
November 9, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29123083/identification-of-a-peptide-recognizing-cerebrovascular-changes-in-mouse-models-of-alzheimer-s-disease
#6
Aman P Mann, Pablo Scodeller, Sazid Hussain, Gary B Braun, Tarmo Mölder, Kadri Toome, Rajesh Ambasudhan, Tambet Teesalu, Stuart A Lipton, Erkki Ruoslahti
Cerebrovascular changes occur in Alzheimer's disease (AD). Using in vivo phage display, we searched for molecular markers of the neurovascular unit, including endothelial cells and astrocytes, in mouse models of AD. We identified a cyclic peptide, CDAGRKQKC (DAG), that accumulates in the hippocampus of hAPP-J20 mice at different ages. Intravenously injected DAG peptide homes to neurovascular unit endothelial cells and to reactive astrocytes in mouse models of AD. We identified connective tissue growth factor (CTGF), a matricellular protein that is highly expressed in the brain of individuals with AD and in mouse models, as the target of the DAG peptide...
November 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/29122668/estimation-of-physiological-sources-of-nonlinearity-in-blood-oxygenation-level-dependent-contrast-signals
#7
Daehun Kang, Yul-Wan Sung, Satoshi Shioiri
Blood oxygenation level-dependent (BOLD) contrast appears through a variation in the transverse relaxation rate of magnetic resonance signals induced by neurovascular coupling and is known to have nonlinear characteristics along echo time (TE) due to the intra-vasculature. However, the physiological causes of this nonlinearity are unclear. We attempted to estimate the physiological information related to the nonlinearity of BOLD signals by using a two-compartment model. For this purpose, we used a multi-echo gradient-echo echo-planar imaging sequence and developed a computational method to estimate the physiological information from the TE-dependent BOLD signals...
November 6, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/29118209/in-vivo-imaging-of-cns-injury-and-disease
#8
Katerina Akassoglou, Mario Merlini, Victoria A Rafalski, Raquel Real, Liang Liang, Yunju Jin, Sarah E Dougherty, Vincenzo De Paola, David J Linden, Thomas Misgeld, Binhai Zheng
In vivo optical imaging has emerged as a powerful tool with which to study cellular responses to injury and disease in the mammalian CNS. Important new insights have emerged regarding axonal degeneration and regeneration, glial responses and neuroinflammation, changes in the neurovascular unit, and, more recently, neural transplantations. Accompanying a 2017 SfN Mini-Symposium, here, we discuss selected recent advances in understanding the neuronal, glial, and other cellular responses to CNS injury and disease with in vivo imaging of the rodent brain or spinal cord...
November 8, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29114270/trigeminal-neuralgia
#9
REVIEW
Yad Ram Yadav, Yadav Nishtha, Pande Sonjjay, Parihar Vijay, Ratre Shailendra, Khare Yatin
Trigeminal neuralgia (TN) is a sudden, severe, brief, stabbing, and recurrent pain within one or more branches of the trigeminal nerve. Type 1 as intermittent and Type 2 as constant pain represent distinct clinical, pathological, and prognostic entities. Although multiple mechanism involving peripheral pathologies at root (compression or traction), and dysfunctions of brain stem, basal ganglion, and cortical pain modulatory mechanisms could have role, neurovascular conflict is the most accepted theory. Diagnosis is essentially clinically; magnetic resonance imaging is useful to rule out secondary causes, detect pathological changes in affected root and neurovascular compression (NVC)...
October 2017: Asian Journal of Neurosurgery
https://www.readbyqxmd.com/read/29104151/high-cervical-spinal-cord-compression-associated-with-anomaly-of-bilateral-vertebral-arteries
#10
Saeko Hayashi, Ryuichi Kanai, Jun Shinoda
BACKGROUND: Anomalies of vertebral arteries are rare, and usually detected incidentally. However, very rarely, they can manifest clinical symptoms. We describe such a symptomatic case of high cervical spinal cord compression associated with persistent C2 segmental arteries. CASE DESCRIPTION: A 67-year-old man presented with a 5-year history of worsening left-sided weakness and gait disturbance. Magnetic resonance imaging, 3D-computed tomography and digital subtraction angiography revealed anomalous courses of vertebral arteries, compressing the cervical spinal cord at C1 level from both sides...
November 2, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29102369/2d-and-3d-assessment-of-sustentaculum-tali-screw-fixation-with-or-without-screw-targeting-clamp
#11
A Siebe De Boer, Esther M M Van Lieshout, Leonie Vellekoop, Simon P Knops, Gert-Jan Kleinrensink, Michael H J Verhofstad
INTRODUCTION: Precise placement of sustentaculum tali screw(s) is essential for restoring anatomy and biomechanical stability of the calcaneus. This can be challenging due to the small target area and presence of neurovascular structures on the medial side. The aim was to evaluate the precision of positioning of the subchondral posterior facet screw and processus anterior calcanei screw with or without a Screw Targeting Clamp. The secondary aim was to evaluate the added value of peroperative 3D imaging over 2D radiographs alone...
October 26, 2017: Injury
https://www.readbyqxmd.com/read/29091009/evidence-based-reporting-a-method-to-optimize-prostate-mri-communications-with-referring-physicians
#12
Michael J Magnetta, Ashley L Donovan, Bruce L Jacobs, Benjamin J Davies, Alessandro Furlan
OBJECTIVE: The purpose of this study was to develop an evidence-based method to optimize prostate MRI reports that would improve communication between urologists and radiologists. MATERIALS AND METHODS: This quality improvement initiative was approved by the institutional Quality Improvement Review Committee. A structured report was developed containing essential components defined by local practice norms and Prostate Imaging Reporting and Data System (PI-RADS) lexicon version 2...
November 1, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29080036/the-size-of-ruptured-intracranial-aneurysms-a%C3%A2-10-year-series-from-a%C3%A2-single-center
#13
Muhammad AlMatter, P Bhogal, M Aguilar Pérez, S Schob, V Hellstern, H Bäzner, O Ganslandt, H Henkes
PURPOSE: There is a controversy concerning the risk of rupture of small intracranial aneurysms. We sought to determine the size and morphological features of ruptured intracranial aneurysms. MATERIAL AND METHODS: The hospital files and images from all patients referred during one decade (2007-2016) to a specialized neurovascular center were retrospectively reviewed. Neck diameter, fundus depth and width as well as neck width based on catheter angiography were measured...
October 27, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/29079241/ankle-fracture-associated-with-rupture-of-the-achilles-tendon-case-report-and-review-of-the-literature
#14
Mohammed Elmajee, Asan Rafee, Tolupe Williams
Solitary ankle fracture or Achilles Tendon (AT) rupture might not be an uncommon injury. However, concomitant ipsilateral ankle fracture with AT rupture is rare. The present report discusses this rare combination. A 30-year-old female had fallen while rock climbing and sustained a closed fracture of the medial malleolus with an ipsilateral complete AT rupture. Most of the reported cases had similar patterns, not only in terms of history, but also in terms of a similar fracture pattern. This rare combination of orthopedic injuries tends to occur when an abrupt excessive force is applied to the forefoot, with subsequent ankle hyperextension or hindfoot inversion...
November 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/29075922/mouse-models-of-neurodegenerative-disease-preclinical-imaging-and-neurovascular-component
#15
Sandra Albanese, Adelaide Greco, Luigi Auletta, Marcello Mancini
Neurodegenerative diseases represent great challenges for basic science and clinical medicine because of their prevalence, pathologies, lack of mechanism-based treatments, and impacts on individuals. Translational research might contribute to the study of neurodegenerative diseases. The mouse has become a key model for studying disease mechanisms that might recapitulate in part some aspects of the corresponding human diseases. Neurodegenerative disorders are very complicated and multifactorial. This has to be taken in account when testing drugs...
October 26, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29075903/the-tethered-effect-of-the-arachnoid-in-vago-glossopharyngeal-neuralgia-a-real-associated-alternative-mechanism
#16
Florian Bernard, Philippe Mercier, Marc Sindou
Vago-glossopharyngeal neuralgia (VGPN) is a rarely seen disease when compared to trigeminal neuralgia. When the pain is resistant to medical therapy, microvascular decompression can be performed if a vascular conflict is suspected on magnetic resonance imaging (MRI). In addition, arachnoid pathology may play a role in VGPN. We report two cases of VGPN caused by tethered arachnoid, associated with a vascular contact in which pain was reduced by freeing rootlets from arachnoid compression. We report two cases relating to 50-year-old and 30-year-old men with a history of electric shooting pain triggered by swallowing in the right pharyngeal and auricular regions...
October 26, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29073665/an-unusual-case-of-simultaneous-bilateral-trigeminal-neuralgia-due-to-multiple-sclerosis
#17
Giulia Di Stefano, Emanuele Tinelli, Andrea Truini
Although several reports have indicated that trigeminal neuralgia related to multiple sclerosis may occur bilaterally in the orofacial region, trigeminal neuralgia pain usually involves the two sides in different time lapses, and the simultaneous involvement of trigeminal territories on both sides is commonly considered incompatible with its diagnosis. This case report describes a patient with bilateral trigeminal neuralgia related to multiple sclerosis that started simultaneously on both sides of the orofacial region...
October 2017: Journal of Oral & Facial Pain and Headache
https://www.readbyqxmd.com/read/29072226/retrospective-morphometric-analysis-of-the-infraorbital-foramen-with-cone-beam-computed-tomography
#18
S Dagistan, Ö Miloǧlu, O Altun, E K Umar
OBJECTIVE: The aim of our study is to examine the morphometric characteristics of the infraorbital foramen (IOF) and its anatomic localization by using cone-beam computerized tomography (CBCT). MATERIALS AND METHODS: In our study, the anatomic characteristics of the IOF were identified by studying retrospectively the CBCT images of one hundred twenty-five (125) patients. These characteristics were assessed statistically in terms of age, gender, and right-left side...
September 2017: Nigerian Journal of Clinical Practice
https://www.readbyqxmd.com/read/29070789/the-electrophysiological-connectome-is-maintained-in-healthy-elders-a-power-envelope-correlation-meg-study
#19
N Coquelet, A Mary, P Peigneux, S Goldman, V Wens, X De Tiège
Functional magnetic resonance imaging (fMRI) studies report age-related changes in resting-state functional connectivity (rsFC), suggesting altered or reorganized connectivity patterns with age. However, age-related changes in neurovascular coupling might also partially account for altered connectivity patterns. Here, we used resting-state magnetoencephalography (MEG) and a connectome approach in carefully selected healthy young adults and elders. The MEG connectome was estimated as rsFC matrices involving forty nodes from six major  resting-state networks...
October 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29064830/evaluation-of-vascular-variations-at-cerebellopontine-angle-by-3d-t2wi-magnetic-resonance-imaging-in-patients-with-vertigo
#20
Fatma Beyazal Celiker, Engin Dursun, Metin Celiker, Tugba Durakoglugil, Mehmet Beyazal, Mehmet Fatih Inecikli, Abdulkadir Ozgur, Suat Terzi
BACKGROUND: Vascular loops of the anterior-inferior cerebellar artery (AICA) at the cerebellopontine angle (CPA) are considered related to auditory-vestibular symptoms. Clinical association of these anatomical aberrations, which can be grouped together as vascular compression syndromes, is controversial. Magnetic resonance imaging (MRI) is widely used to visualize this anatomical region, given its high sensitivity and specificity. OBJECTIVE: To elucidate the clinical relationship of vertigo symptoms with vascular loop compression syndrome by evaluating the neurovascular contacts of the vestibulocochlear nerve (VCN) and AICA at the CPA and internal auditory canal via high-resolution MRI...
2017: Journal of Vestibular Research: Equilibrium & Orientation
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