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https://www.readbyqxmd.com/read/28459961/crowdsourcing-seizure-detection-algorithm-development-and-validation-on-human-implanted-device-recordings
#1
Steven N Baldassano, Benjamin H Brinkmann, Hoameng Ung, Tyler Blevins, Erin C Conrad, Kent Leyde, Mark J Cook, Ankit N Khambhati, Joost B Wagenaar, Gregory A Worrell, Brian Litt
There exist significant clinical and basic research needs for accurate, automated seizure detection algorithms. These algorithms have translational potential in responsive neurostimulation devices and in automatic parsing of continuous intracranial electroencephalography data. An important barrier to developing accurate, validated algorithms for seizure detection is limited access to high-quality, expertly annotated seizure data from prolonged recordings. To overcome this, we hosted a kaggle.com competition to crowdsource the development of seizure detection algorithms using intracranial electroencephalography from canines and humans with epilepsy...
June 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28419635/canine-histiocytic-sarcoma-presenting-as-a-target-lesion-on-brain-magnetic-resonance-imaging-and-as-a-solitary-pulmonary-mass
#2
Jill Hicks, Renee Barber, Bronwen Childs, Shannon Gm Kirejczyk, Elizabeth W Uhl
A 6-year-old spayed female miniature schnauzer presented with generalized seizures and progressive multifocal intracranial neurologic disease. Thoracic radiographs and computed tomography (CT) revealed a large solitary pulmonary mass within the right cranial lung lobe. On brain magnetic resonance imaging (MRI), a solitary intraparenchymal mass within the left piriform lobe had a "target" appearance on both pre- and postcontrast sequences. Cerebrospinal fluid was unremarkable and histopathology indicated both masses represented histiocytic sarcoma...
April 17, 2017: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/28410675/the-relationship-between-epileptiform-discharges-and-background-activity-in-the-visual-analysis-of-electroencephalographic-examinations-in-dogs-with-seizures-of-different-etiologies
#3
M Wrzosek, J R Ives, M Karczewski, E Dziadkowiak, E Gruszka
Electroencephalographic (EEG) recordings in 125 outpatient dogs with various epileptiform encephalopathies were acquired under medetomidine sedation using subdermal wire electrodes. The features of canine EEG (background activity [BGA] and epileptiform discharges [EDs]) were assessed, described and compared. The dogs included neurologically healthy controls (N, n = 19), dogs with portosystemic shunt (PSS, n = 9), dogs with intracranial pathologies (IP, n = 27) and dogs with idiopathic epilepsy (IE, n = 70)...
April 2017: Veterinary Journal
https://www.readbyqxmd.com/read/28377923/dynamic-susceptibility-contrast-magnetic-resonance-imaging-protocol-of-the-normal-canine-brain
#4
Krystina L Stadler, Anthony P Pease, Elizabeth A Ballegeer
Perfusion magnetic resonance imaging (MRI), specifically dynamic susceptibility MRI (DSC-MRI) is routinely performed as a supplement to conventional MRI in human medicine for patients with intracranial neoplasia and cerebrovascular events. There is minimal data on the use of DSC-MRI in veterinary patients and a DSC-MRI protocol in the veterinary patient has not been described. Sixteen normal dogs, 6 years or older were recruited for this study. The sample population included 11 large dogs (>11 kg) and 5 small dogs (<11 kg)...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28357072/analysis-of-plasma-free-amino-acid-profiles-in-canine-brain-tumors
#5
Shinichi Utsugi, Kazuo Azuma, Tomohiro Osaki, Yusuke Murahata, Takeshi Tsuka, Norihiko Ito, Tomohiro Imagawa, Yoshiharu Okamoto
Canine brain tumors are best diagnosed using magnetic resonance imaging (MRI). However, opportunities of MRI examination are restricted due to its limited availability in veterinary facilities; thus, numerous canine brain tumors are diagnosed at an advanced stage. Therefore, development of a noninvasive diagnostic biomarker is required for the early detection of brain tumors. In the present study, plasma free amino acid (PFAA) profiles between dogs with and without brain tumors were compared. A total of 12 dogs with brain tumors, diagnosed based on clinical signs, and on the results of intracranial MRI and/or pathological examination were evaluated...
February 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28152631/construction-of-an-in%C3%A2-vivo-carotid-siphon-model-for-testing-endovascular-devices-for-neuro-interventions
#6
Bu-Lang Gao, Yong-Li Wang, Xue-Jing Zhang, Qiong-Ying Fan, Wei-Li Hao, Dong-Hai Zhang
Objective The aim of this study was to construct an in vivo carotid siphon model for testing neurovascular devices for endovascular interventions. Methods A model of a human carotid siphon was pre-shaped using a glass tube from a human cadaver and used to confine a segment of one side of the common carotid artery (CCA) in canines. This segment of CCA with the glass carotid siphon on was interposed end-to-end onto the contralateral CCA so as to simulate a human carotid artery siphon in vivo. Two weeks later, the siphon model was evaluated using computed tomography angiography and digital subtraction angiography, and the covered stent specially designed for intracranial vasculature was navigated through the siphon model for a longitudinal flexibility test...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27995128/intravenous-topiramate-pharmacokinetics-in-dogs-with-naturally-occurring-epilepsy
#7
Irene Vuu, Lisa D Coles, Patricia Maglalang, Ilo E Leppik, Greg Worrell, Daniel Crepeau, Usha Mishra, James C Cloyd, Edward E Patterson
RATIONALE: Barriers to developing treatments for human status epilepticus include the inadequacy of experimental animal models. In contrast, naturally occurring canine epilepsy is similar to the human condition and can serve as a platform to translate research from rodents to humans. The objectives of this study were to characterize the pharmacokinetics of an intravenous (IV) dose of topiramate (TPM) in dogs with epilepsy and evaluate its effect on intracranial electroencephalographic (iEEG) features...
2016: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/27807850/temporal-behavior-of-seizures-and-interictal-bursts-in-prolonged-intracranial-recordings-from-epileptic-canines
#8
Hoameng Ung, Kathryn A Davis, Drausin Wulsin, Joost Wagenaar, Emily Fox, John J McDonnell, Ned Patterson, Charles H Vite, Gregory Worrell, Brian Litt
OBJECTIVE: Epilepsy is a chronic disorder, but seizure recordings are usually obtained in the acute setting. The chronic behavior of seizures and the interictal bursts that sometimes initiate them is unknown. We investigate the variability of these electrographic patterns over an extended period of time using chronic intracranial recordings in canine epilepsy. METHODS: Continuous, yearlong intracranial electroencephalography (iEEG) recordings from four dogs with naturally occurring epilepsy were analyzed for seizures and interictal bursts...
December 2016: Epilepsia
https://www.readbyqxmd.com/read/27703619/meningitis-and-subdural-empyema-as-complication-of-pterygomandibular-space-abscess-upon-tooth-extraction
#9
Paolo Cariati, Almudena Cabello-Serrano, Fernando Monsalve-Iglesias, Maria Roman-Ramos, Blas Garcia-Medina
Complication of dental infections might be various and heterogeneous. The most common complications are represented by maxilar celulitis, canine space celulitis, infratemporal space celulitis, temporal celulitis and bacteremia. Among rarest complications we found: sepsis, bacterial endocarditis, mediastinitis, intracranial complications, osteomyelitis, etc. Although dental infections are often considered trivial entities, sometimes they can reach an impressive gravity. In this regard, the present study describes a case of dental infection complicated by meningitis, subdural empiema and cerebral vasculitis...
October 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27648262/optic-nerve-astrocytoma-in-a-dog
#10
Orr Rozov, Pablo E Piñeyro, Kurt L Zimmerman, Ian P Herring, Rachel Matusow, John H Rossmeisl, Bernard S Jortner, Jennifer Dreyfus
Intracranial astrocytomas are relatively uncommon in dogs and optic nerve astrocytomas even more so. This neoplasm should be considered as differential in canine patients with vision loss, retinal detachment, ocular mass, and histopathologic findings of infiltrative fusiform to polygonal glial cells possibly associated with glomeruloid vascular proliferation.
September 2016: Clinical Case Reports
https://www.readbyqxmd.com/read/27576304/a-complication-probability-planning-study-to-predict-the-safety-of-a-new-protocol-for-intracranial-tumour-radiotherapy-in-dogs
#11
C Rohrer Bley, V Meier, P Schwarz, M Roos, J Besserer
Technical advances make it possible to deliver radiation therapy for canine intracranial tumours in fewer fractions, under the assumption of equivalent tumour control. With the aim of estimating the late toxicity risk profile for various tumour sizes and locations, the present paper evaluates the normal tissue complication probability (NTCP) values for the intracranial organs at risk. By making isoeffect calculations, a new 10-fraction radiation protocol was developed with the same tumour control probability (TCP) as a currently used 20-fraction standard protocol, and complication risk profiles for brain, brainstem and optic chiasm were modelled using a representative population of 64 dogs with brain tumours...
August 31, 2016: Veterinary and Comparative Oncology
https://www.readbyqxmd.com/read/27464854/seizure-forecasting-and-the-preictal-state-in-canine-epilepsy
#12
Yogatheesan Varatharajah, Ravishankar K Iyer, Brent M Berry, Gregory A Worrell, Benjamin H Brinkmann
The ability to predict seizures may enable patients with epilepsy to better manage their medications and activities, potentially reducing side effects and improving quality of life. Forecasting epileptic seizures remains a challenging problem, but machine learning methods using intracranial electroencephalographic (iEEG) measures have shown promise. A machine-learning-based pipeline was developed to process iEEG recordings and generate seizure warnings. Results support the ability to forecast seizures at rates greater than a Poisson random predictor for all feature sets and machine learning algorithms tested...
February 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/27419825/novel-method-for-dynamic-control-of-intracranial-pressure
#13
Mark G Luciano, Stephen M Dombrowski, Sara Qvarlander, Serge El-Khoury, Jun Yang, Suraj Thyagaraj, Francis Loth
OBJECT Intracranial pressure (ICP) pulsations are generally considered a passive result of the pulsatility of blood flow. Active experimental modification of ICP pulsations would allow investigation of potential active effects on blood and CSF flow and potentially create a new platform for the treatment of acute and chronic low blood flow states as well as a method of CSF substance clearance and delivery. This study presents a novel method and device for altering the ICP waveform via cardiac-gated volume changes...
May 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27382751/-evaluation-on-ability-to-detect-the-intracranial-hematoma-with-different-density-using-c-arm-cone-beam-computed-tomography-based-on-animal-model
#14
Mi Zhou, Yongming Zeng, Renqiang Yu, Yang Zhou, Rui Xu, Jingkun Sun, Zhimei Gao
This study aims to evaluate the ability of C-arm cone-beam CT to detect intracranial hematomas in canine models. Twenty one healthy canines were divided into seven groups and each group had three animals. Autologous blood and contrast agent (3 mL) were slowly injected into the left/right frontal lobes of each animal. Canines in the first group, the control group, were only injected with autologous blood without contrast agent. Each animal in all the 7 groups was scanned with C-arm cone-beam CT and multislice computed tomography (MSCT) after 5 minutes...
February 2016: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/27227650/correction-forecasting-seizures-using-bivariate-intracranial-eeg-measures-and-svm-in-naturally-occurring-canine-epilepsy
#15
Benjamin H Brinkmann, Edward E Patterson, Charles Vite, Vincent M Vasoli, Daniel Crepeau, Matt Stead, J Jeffry Howbert, Vladimir Cherkassky, Joost B Wagenaar, Brian Litt, Gregory A Worrell
[This corrects the article DOI: 10.1371/journal.pone.0133900.].
2016: PloS One
https://www.readbyqxmd.com/read/27149650/perfusion-and-volume-response-of-canine-brain-tumors-to-stereotactic-radiosurgery-and-radiotherapy
#16
A L Zwingenberger, R E Pollard, S L Taylor, R X Chen, J Nunley, M S Kent
BACKGROUND: Stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SRT) are highly conformal, high-dose radiation treatment techniques used to treat people and dogs with brain tumors. OBJECTIVES: To evaluate the response to SRS- and SRT-treated tumors using volume and perfusion variables and to measure the survival times of affected dogs. ANIMALS: Prospective study of 34 dogs with evidence of brain tumors undergoing stereotactic radiosurgery (SRS) or stereotactic radiotherapy (SRT)...
May 2016: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27144775/magnetic-resonance-imaging-of-intracranial-inflammatory-conditions-in-dogs-sensitivity-of-subtraction-images-versus-pre-and-post-gadolinium-t1-weighted-image-pairs
#17
Helen Dirrig, Christopher R Lamb
Ante mortem diagnosis of canine meningoencephalitis is usually based on the results of neurologic examination, cerebrospinal fluid analysis and magnetic resonance (MR) imaging. It has been hypothesized that subtraction MR imaging may increase the sensitivity of MR for intracranial inflammatory lesions compared to conventional post-gadolinium T1-weighted imaging. Sensitivity of pre- and post-gadolinium (C-/C+) image pairs and dynamic subtraction (DS) images was compared in a retrospective diagnostic accuracy study of 52 dogs with inflammatory cerebrospinal fluid and 67 dogs with idiopathic epilepsy...
July 2016: Veterinary Radiology & Ultrasound
https://www.readbyqxmd.com/read/27034258/crowdsourcing-reproducible-seizure-forecasting-in-human-and-canine-epilepsy
#18
Benjamin H Brinkmann, Joost Wagenaar, Drew Abbot, Phillip Adkins, Simone C Bosshard, Min Chen, Quang M Tieng, Jialune He, F J Muñoz-Almaraz, Paloma Botella-Rocamora, Juan Pardo, Francisco Zamora-Martinez, Michael Hills, Wei Wu, Iryna Korshunova, Will Cukierski, Charles Vite, Edward E Patterson, Brian Litt, Gregory A Worrell
SEE MORMANN AND ANDRZEJAK DOI101093/BRAIN/AWW091 FOR A SCIENTIFIC COMMENTARY ON THIS ARTICLE  : Accurate forecasting of epileptic seizures has the potential to transform clinical epilepsy care. However, progress toward reliable seizure forecasting has been hampered by lack of open access to long duration recordings with an adequate number of seizures for investigators to rigorously compare algorithms and results. A seizure forecasting competition was conducted on kaggle.com using open access chronic ambulatory intracranial electroencephalography from five canines with naturally occurring epilepsy and two humans undergoing prolonged wide bandwidth intracranial electroencephalographic monitoring...
June 2016: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/26942592/the-retrograde-ventriculosinusal-shunt-in-an-animal-experimental-model-of-hydrocephalus
#19
Fernando Campos Gomes Pinto, Rodrigo Becco, Eduardo Joaquim Lopes Alho, Luiz Francisco Poli-de-Figueiredo, Podalyro Amaral de Souza, Matheus Fernandes de Oliveira, Manoel Jacobsen Teixeira
Currently, hydrocephalus treatment is performed mainly with ventriculoperitoneal shunting. This experimental study aims at assessing whether the experimental model of hydrocephalus in dogs is applicable to the laboratory study of the retrograde ventriculosinusal shunt (RVSS). Four mongrel dogs were assessed. After randomization, the animals were divided into two groups: an experimental group that underwent the induction of hydrocephalus/RVSS and a control group, for the measurement of the mean arterial pressure, intracranial pressure and pressure in the superior sagittal sinus (SSS)...
2016: Pediatric Neurosurgery
https://www.readbyqxmd.com/read/26880608/multidetector-computed-tomographic-and-low-field-magnetic-resonance-imaging-anatomy-of-the-quadrigeminal-cistern-and-characterization-of-supracollicular-fluid-accumulations-in-dogs
#20
G Bertolini, M Ricciardi, M Caldin
Focal fluid accumulations in the supracollicular region are commonly termed quadrigeminal cysts and may be either subclinical or associated with neurologic deficits in dogs. Little published information is available on normal imaging anatomy and anatomic relationships for the canine quadrigeminal cistern. Objectives of this observational, cross-sectional study were to describe normal quadrigeminal cistern anatomy and determine the prevalence and characteristics of supracollicular fluid accumulations in dogs...
May 2016: Veterinary Radiology & Ultrasound
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