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Neurovascular imaging

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https://www.readbyqxmd.com/read/28433640/partial-gland-treatment-of-prostate-cancer-utilizing-high-intensity-focused-ultrasound-in-the-primary-and-salvage-setting-a-systematic-review
#1
REVIEW
Ron Golan, Adrien N Bernstein, Timothy D McClure, Art Sedrakyan, Neal A Patel, Dipen J Parekh, Leonard S Marks, Jim C Hu
PURPOSE: Advances in prostate imaging, biopsy and ablative technologies have been accompanied by growing enthusiasm for partial gland ablation, particularly using high-intensity focused ultrasound (HIFU) for treating prostate cancer. The preservation of non-cancerous prostate tissue and minimizing damage to the neurovascular bundles and external urethral sphincter may improve functional outcomes. MATERIALS AND METHODS: A systematic review was performed following the PRISMA guidelines using a combination of MeSH terms, free-text search, and review of relevant bibliographies using Medline and Embase from the inception of each database through October 10, 2016...
April 19, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28421878/cerebrovascular-injury-in-cryptococcal-meningitis
#2
Ajay Kumar Mishra, Vanjare Harshad Arvind, Divya Muliyil, Cijoy K Kuriakose, Anu Anna George, Reka Karuppusami, Ronald Albert Benton Carey, Sunithi Mani, Samuel George Hansdak
Background Cryptococcal meningitis continues to be one of the common causes of chronic central nervous system infection worldwide. Individuals with cryptococcal meningitis can occasionally present with small vessel vasculitis causing infarcts primarily in the basal ganglia, internal capsule, and thalamus. Literature regarding patterns of cerebrovascular injury among patients with cryptococcal meningitis is scanty, and outcome following these vascular involvements is unknown. Aim To study the clinical profile, imaging findings, and details of vascular territory involved among patients admitted with cryptococcal meningitis and central nervous system infarct in a tertiary care center from India...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28409316/mental-foramen-and-lingual-vascular-canals-of-mandible-on-mdct-images-anatomical-study-and-review-of-the-literature
#3
Filiz Direk, Ismihan Ilknur Uysal, Ali Sami Kivrak, Zeliha Fazliogullari, Nadire Unver Dogan, Ahmet Kagan Karabulut
The mental foramen and lingual vascular canals are related to vessels and nerves in the mandibular body. The aim of the present study was to determine the number and location of these structures and to make measurements of them. The archived Multidetector Computed Tomography images of 100 adult (15- to 70-year-old) patients were evaluated retrospectively. The diameters of the mental foramens and their distances from the front, back, upper and lower reference points were measured. The distribution of mental foramens with respect to the teeth was also researched...
April 13, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28396293/the-impact-of-ultra-high-field-mri-on-cognitive-and-computational-neuroimaging
#4
Federico De Martino, Essa Yacoub, Valentin Kemper, Michelle Moerel, Kamil Uludag, Peter De Weerd, Kamil Ugurbil, Rainer Goebel, Elia Formisano
The ability to measure functional brain responses non-invasively with ultra high field MRI (7 T and above) represents a unique opportunity in advancing our understanding of the human brain. Compared to lower fields (3 T and below), ultra high field MRI has an increased sensitivity, which can be used to acquire functional images with greater spatial resolution, and greater specificity of the blood oxygen level dependent (BOLD) signal to the underlying neuronal responses. Together, increased resolution and specificity enable investigating brain functions at a submillimeter scale, which so far could only be done with invasive techniques...
April 7, 2017: NeuroImage
https://www.readbyqxmd.com/read/28390805/from-transmandibular-to-transoral-robotic-approach-for-parapharyngeal-space-tumors
#5
Francesco Chu, Marta Tagliabue, Gioacchino Giugliano, Luca Calabrese, Lorenzo Preda, Mohssen Ansarin
PURPOSE: Parapharyngeal space (PPS) tumors are rare, accounting for 0.5% of all head-and-neck masses. Surgery remains the standard treatment for most cases, including different approaches (cervical approach, parotidectomy, mandibulotomy, transoral/robotic). We report our experience in the management of PPS tumors, aiming to create a surgical algorithm on the base of tumor's radiological and clinical characteristics. MATERIALS AND METHODS: Critical retrospective analysis of patients with PPS neoplasms who underwent surgery at our Institute...
March 31, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28385885/the-role-of-mri-in-diagnosing-neurovascular-compression-of-the-cochlear-nerve-resulting-in-typewriter-tinnitus
#6
Y J Bae, Y J Jeon, B S Choi, J-W Koo, J-J Song
BACKGROUND AND PURPOSE: Typewriter tinnitus, a symptom characterized by paroxysmal attacks of staccato sounds, has been thought to be caused by neurovascular compression of the cochlear nerve, but the correlation between radiologic evidence of neurovascular compression of the cochlear nerve and symptom presentation has not been thoroughly investigated. The purpose of this study was to examine whether radiologic evidence of neurovascular compression of the cochlear nerve is pathognomonic in typewriter tinnitus...
April 6, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28377246/awake-surgery-for-brain-vascular-malformations-and-moyamoya-disease
#7
Rami James N Aoun, Mithun G Sattur, Chandan Krishna, Amen Gupta, Matthew E Welz, Allan D Nanney, Antoun H Koht, Matthew C Tate, Katherine H Noe, Joseph I Sirven, Barrett J Anderies, Patrick B Bolton, Terry L Trentman, Richard S Zimmerman, Kristin R Swanson, Bernard R Bendok
OBJECTIVE: While a significant amount of experience has accumulated for awake procedures for brain tumor, epilepsy and carotid surgery, its utility for intracranial neurovascular indications remains largely undefined. Awake surgery, for select neurovascular cases, offers the advantage of precise brain mapping and robust neurological monitoring during surgery for lesions in eloquent areas, avoidance of potential hemodynamic instability, and possible faster recovery. Additionally, it opens the window for perilesional epileptogenic tissue resection with potentially less risk for iatrogenic injury...
April 1, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28373447/neurovascular-bundle-infiltration-can-explain-local-relapses-using-conformal-radiotherapy-of-prostate-cancer
#8
Andreas K Johansson, Bo Lennernäs, Ulf Isacsson
AIM: To quantify the impact of decreased margins for two treatment techniques, three-dimensional conformal radiotherapy (3D-CRT) and volumetric-modulated arc therapy (VMAT), on local control in curative treatment of prostate cancer. MATERIALS AND METHODS: The planning target volume (PTV) margins were decreased in steps of 1 mm from 10 to 1 mm. Treatment plans using 3D-CRT and VMAT technique were produced for all margin sizes and the dose to the neuro vascular bundles (NVB), that was not included in the PTV, was investigated...
April 2017: Anticancer Research
https://www.readbyqxmd.com/read/28369176/glial-calcium-waves-are-triggered-by-seizure-activity-and-not-essential-for-initiating-ictal-onset-or-neurovascular-coupling
#9
Eliza Baird-Daniel, Andy G S Daniel, Michael Wenzel, Dan Li, Jyun-You Liou, Philippe Laffont, Mingrui Zhao, Rafael Yuste, Hongtao Ma, Theodore H Schwartz
It has been postulated that glia play a critical role in modifying neuronal activity, mediating neurovascular coupling, and in seizure initiation. We investigated the role of glia in ictogenesis and neurovascular coupling through wide-field multicell and 2-photon single cell imaging of calcium and intrinsic signal imaging of cerebral blood volume in an in vivo rat model of focal neocortical seizures. Ictal events triggered a slowly propagating glial calcium wave that was markedly delayed after both neuronal and hemodynamic onset...
March 21, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28368084/neurovascular-ultrasound-in-emergency-settings-diagnostic-and-therapeutic-aspects
#10
REVIEW
T Santos, M Veloso, P Barros
INTRODUCTION: Neurovascular ultrasound is a non-invasive, portable and fast imaging method that, when performed by an experienced neurosonologist, offers reliable and reproducible information on the morphological and hemodynamic status of cervical and intracranial vessels. AIM: To review the available evidence regarding the use of this tool in the approach to acute stroke. DEVELOPMENT: Neurovascular ultrasound can be used in one of two ways: diagnostic and therapeutic...
April 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28362892/sellar-and-parasellar-imaging
#11
Carlos Zamora, Mauricio Castillo
The skull base is a complex anatomical region that harbors many important neurovascular structures in a relatively confined space. The pathology that can develop at this site is varied, and many disease processes may present with similar clinical and neuroimaging findings. While computed tomography maintains a role in the evaluation of many entities and can, for instance, delineate osseous erosion with great detail and characterize calcified tumor matrices, magnetic resonance imaging (MRI) is the mainstay in the neuroimaging assessment of most pathology occurring at the skull base...
January 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28358291/feasibility-and-utility-of-an-integrated-medical-imaging-and-informatics-smartphone-system-for-management-of-acute-stroke
#12
Kristina Shkirkova, Eftitan Y Akam, Josephine Huang, Sunil A Sheth, May Nour, Conrad W Liang, Michael McManus, Van Trinh, Gary Duckwiler, Jason Tarpley, Fernando Vinuela, Jeffrey L Saver
Background Rapid dissemination and coordination of clinical and imaging data among multidisciplinary team members are essential for optimal acute stroke care. Aim To characterize the feasibility and utility of the Synapse Emergency Room mobile (Synapse ERm) informatics system. Methods We implemented the Synapse ERm system for integration of clinical data, computerized tomography, magnetic resonance, and catheter angiographic imaging, and real-time stroke team communications, in consecutive acute neurovascular patients at a Comprehensive Stroke Center...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28349170/ct-reconstruction-and-mri-fusion-of-3d-rotational-angiography-in-the-evaluation-of-pediatric-cerebrovascular-lesions
#13
Prakash Muthusami, Nicholas Shkumat, Vanessa Rea, Albert H Chiu, Manohar Shroff
PURPOSE: Complex neurovascular lesions in children require precise anatomic understanding for treatment planning. Although 3DRA is commonly employed for volumetric reformation in neurointerventional procedures, the ability to reconstruct this data into CT-like images (3DRA-CT) is not widely utilized. This study demonstrates the feasibility and usefulness of 3DRA-CT and subsequent MRI fusion for problem solving in pediatric neuroangiography. METHODS: This retrospective study includes 18 3DRA-CT studies in 16 children (age 9...
March 27, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28339630/mr-tractography-in-short-lasting-unilateral-neuralgiform-headache-attacks-with-conjunctival-injection-and-tearing-sunct-patients-case-reports
#14
Ozlem Coskun, Murat Ucar, Doga Vuralli, Funuzar Yildirim, Rumeysa Cetinkaya, Suna Akin Takmaz, Serap Ucler
Background. : Short-lasting unilateral neuralgiform headache attack with conjunctival injection and tearing (SUNCT) is one of the trigeminal autonomic cephalalgias where neurovascular compression was detected in neuroimaging in recent years. Case. : We report two cases, a 52-year-old adult and a 69-year-old elderly patient with short-lasting and recurrent headache combined with cranial autonomic features. Diffusion tensor imaging (DTI) and magnetic resonance (MR) tractography of both patients outlined structural changes of the trigeminal nerve revealing neurovascular compression...
February 11, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28335509/novel-diagnostic-and-predictive-biomarkers-in-pancreatic-adenocarcinoma
#15
REVIEW
John C Chang, Madappa Kundranda
Pancreatic ductal adenocarcinoma (PDAC) is a highly lethal disease for a multitude of reasons including very late diagnosis. This in part is due to the lack of understanding of the biological behavior of PDAC and the ineffective screening for this disease. Significant efforts have been dedicated to finding the appropriate serum and imaging biomarkers to help early detection and predict response to treatment of PDAC. Carbohydrate antigen 19-9 (CA 19-9) has been the most validated serum marker and has the highest positive predictive value as a stand-alone marker...
March 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28327964/imaging-approaches-to-stroke-and-neurovascular-disease
#16
Seena Dehkharghani, Jalal Andre
Imaging is paramount to the diagnosis and management of ischemic stroke, offering a battery of structural and functional probes of cerebrovascular physiology. The technical underpinnings of stroke imaging continue to evolve, bringing the neuroscience community increasingly closer to high-resolution, tissue-level biomarkers of brain perfusion, metabolism, and viability. The rapid expansion of neuroimaging in this domain has met with controversies, and in many respects, a lack of generalizable conclusions regarding optimized use in cerebrovascular disease...
January 28, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28326408/traumatic-anterior-knee-dislocation-after-total-knee-arthroplasty
#17
Richard S Ahn, Matthew J Brown, Mario D Santilli
This article describes a traumatic complete anterior knee dislocation of a previously well-functioning total knee arthroplasty. A thorough physical examination with appropriate radiographic imaging study is required for proper evaluation and treatment of this injury, as it is often associated with neurovascular injury and subsequent global instability of the injured knee is likely.
September 2016: Arthroplasty Today
https://www.readbyqxmd.com/read/28324130/the-oblique-popliteal-ligament-an-anatomic-and-mri-investigation
#18
Mandy Hedderwick, Mark D Stringer, Liam McRedmond, Grant R Meikle, Stephanie J Woodley
PURPOSE: Despite being the largest ligament on the posterior aspect of the knee, relatively little is known about the normal morphology of the oblique popliteal ligament (OPL). The aim of this study was to investigate the detailed anatomy of the OPL in cadavers and healthy volunteers. METHODS: The posterior knee was investigated in 25 cadaver lower limbs (mean age 76 ± 9.5 years; 7 men) by dissection, histology, and serial plastination and in 14 healthy individuals (mean age 23 ± 3...
March 21, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28287157/neurovascular-microcirculatory-vasodilation-mediated-by-c-fibers-and-transient-receptor-potential-vanilloid-type-1-channels-trpv-1-is-impaired-in-type-1-diabetes
#19
P Marche, S Dubois, P Abraham, E Parot-Schinkel, L Gascoin, A Humeau-Heurtier, P H Ducluzeau, G Mahe
Microvascular dysfunction may have an early onset in type 1 diabetes (T1D) and can precede major complications. Our objectives were to assess the endothelial-dependent (acetylcholine, ACh; and post-occlusive hyperemia, PORH), non-endothelial-dependent (sodium nitroprusside, SNP) and neurovascular-dependent (local heating, LH and current induced vasodilation, CIV) microcirculatory vasodilation in T1D patients compared with matched control subjects using a laser speckle contrast imager. Seventeen T1D patients - matched with 17 subjects according to age, gender, Body-Mass-Index, and smoking status - underwent macro- and microvascular investigations...
March 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28284817/differential-effects-of-gaseous-versus-injectable-anesthetics-on-changes-in-regional-cerebral-blood-flow-and-metabolism-induced-by-l-dopa-in-a-rat-model-of-parkinson-s-disease
#20
Zisis Bimpisidis, Carl M Öberg, Natallia Maslava, M Angela Cenci, Cornelia Lundblad
Preclinical imaging of brain activity requires the use of anesthesia. In this study, we have compared the effects of two widely used anesthetics, inhaled isoflurane and ketamine/xylazine cocktail, on cerebral blood flow and metabolism in a rat model of Parkinson's disease and l-DOPA-induced dyskinesia. Specific tracers were used to estimate regional cerebral blood flow (rCBF - [(14)C]-iodoantipyrine) and regional cerebral metabolic rate (rCMR - [(14)C]-2-deoxyglucose) with a highly sensitive autoradiographic method...
March 8, 2017: Experimental Neurology
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