keyword
MENU ▼
Read by QxMD icon Read
search

Intracranial volume measurement

keyword
https://www.readbyqxmd.com/read/28107408/effect-of-positive-end-expiratory-pressure-on-the-sonographic-optic-nerve-sheath-diameter-as-a-surrogate-for-intracranial-pressure-during-robot-assisted-laparoscopic-prostatectomy-a-randomized-controlled-trial
#1
Ji-Hyun Chin, Wook-Jong Kim, Joonho Lee, Yun A Han, Jinwook Lim, Jai-Hyun Hwang, Seong-Sik Cho, Young-Kug Kim
BACKGROUND: Positive end-expiratory pressure (PEEP) can increase intracranial pressure. Pneumoperitoneum and the Trendelenburg position are associated with an increased intracranial pressure. We investigated whether PEEP ventilation could additionally influence the sonographic optic nerve sheath diameter as a surrogate for intracranial pressure during pneumoperitoneum combined with the Trendelenburg position in patients undergoing robot-assisted laparoscopic prostatectomy. METHODS: After anesthetic induction, 38 patients were randomly allocated to a low tidal volume ventilation (8 ml/kg) without PEEP group (zero end-expiratory pressure [ZEEP] group, n = 19) or low tidal volume ventilation with 8 cmH2O PEEP group (PEEP group, n = 19)...
2017: PloS One
https://www.readbyqxmd.com/read/28104642/evaluation-of-encephaloduroarteriosynangiosis-efficacy-using-probabilistic-independent-component-analysis-applied-to-dynamic-susceptibility-contrast-perfusion-mri
#2
A N Laiwalla, F Kurth, K Leu, R Liou, J Pamplona, Y C Ooi, N Salamon, B M Ellingson, N R Gonzalez
BACKGROUND AND PURPOSE: Indirect cerebral revascularization has been successfully used for treatment in Moyamoya disease and symptomatic intracranial atherosclerosis. While angiographic neovascularization has been demonstrated after surgery, measurements of local tissue perfusion are scarce and may not reflect the reported successful clinical outcomes. We investigated probabilistic independent component analysis and conventional perfusion parameters from DSC-MR imaging to measure postsurgical changes in tissue perfusion...
January 19, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28102508/simvastatin-promotes-hematoma-absorption-and-reduces-hydrocephalus-following-intraventricular-hemorrhage-in-part-by-upregulating-cd36
#3
Qianwei Chen, Xia Shi, Qiang Tan, Zhou Feng, Yuelong Wang, Qiaoying Yuan, Yihao Tao, Jianbo Zhang, Liang Tan, Gang Zhu, Hua Feng, Zhi Chen
We previously found that hematoma worsens hydrocephalus after intraventricular hemorrhage (IVH) via increasing iron deposition and aggravating ependymal cilia injury; therefore, promoting hematoma absorption may be a promising strategy for IVH. Recently, some investigations imply that simvastatin has the ability of accelerating hematoma absorption. Thus, this study was designed to examine the efficacy of simvastatin for IVH in rats. Intracerebral hemorrhage with ventricular extension was induced in adult male Sprague-Dawley rats after autologous blood injection...
January 19, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28101099/magnetic-resonance-volumetry-prediction-of-subjective-memory-complaints-and-mild-cognitive-impairment-and-associations-with-genetic-and-cardiovascular-risk-factors
#4
Sigbjørn Rogne, Torgil Vangberg, Petter Eldevik, Gry Wikran, Ellisiv B Mathiesen, Henrik Schirmer
BACKGROUND/AIMS: Subjective memory complaints (SMC) are strong predictors of mild cognitive impairment (MCI) and subsequent Alzheimer's disease. Our aims were to see if fully automated cerebral MR volume measurements could distinguish subjects with SMC and MCI from controls, and if probable parental late-onset Alzheimer's disease (LOAD), apolipoprotein E ε4 genotype, total plasma homocysteine, and cardiovascular risk factors were associated with MR volumetric findings. METHODS: 198 stroke-free subjects comprised the control (n = 58), the SMC (n = 25) and the MCI (n = 115) groups...
September 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/28092022/relevance-of-neuroimaging-for-neurocognitive-and-behavioral-outcome-after-pediatric-traumatic-brain-injury
#5
Marsh Königs, Petra Jw Pouwels, L W Ernest van Heurn, Roel Bakx, R Jeroen Vermeulen, J Carel Goslings, Bwee Tien Poll-The, Marleen van der Wees, Coriene E Catsman-Berrevoets, Jaap Oosterlaan
This study aims to (1) investigate the neuropathology of mild to severe pediatric TBI and (2) elucidate the predictive value of conventional and innovative neuroimaging for functional outcome. Children aged 8-14 years with trauma control (TC) injury (n = 27) were compared to children with mild TBI and risk factors for complicated TBI (mild(RF+), n = 20) or moderate/severe TBI (n = 17) at 2.8 years post-injury. Neuroimaging measures included: acute computed tomography (CT), volumetric analysis on post-acute conventional T1-weighted magnetic resonance imaging (MRI) and post-acute diffusion tensor imaging (DTI, analyzed using tract-based spatial statistics and voxel-wise regression)...
January 14, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28088795/influence-of-intracranial-air-on-electrode-position-and-clinical-outcomes-following-deep-brain-stimulation-for-parkinson-s-disease
#6
J Nicole Bentley, Zhe Guan, Karen S Cummings, Kelvin L Chou, Parag G Patil
BACKGROUND: The introduction of intracranial air during deep brain stimulation (DBS) surgery is believed to negatively impact targeting accuracy and clinical outcomes. OBJECTIVE: To quantify the relationship between intracranial air (ICA) volumes, targeting accuracy, and clinical outcomes in patients undergoing subthalamic nucleus (STN) DBS for Parkinson's disease. METHODS: ICA in 73 consecutive STN DBS cases (146 leads) was measured by high-resolution CT and correlated with proximal lead bowing, electrode displacement, targeting accuracy, and clinical outcomes at 6 and 12 months...
January 14, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28068234/radiation-dose-dependent-hippocampal-atrophy-detected-with-longitudinal-volumetric-magnetic-resonance-imaging
#7
Tyler M Seibert, Roshan Karunamuni, Hauke Bartsch, Samar Kaifi, Anitha Priya Krishnan, Yoseph Dalia, Jeffrey Burkeen, Vyacheslav Murzin, Vitali Moiseenko, Joshua Kuperman, Nathan S White, James B Brewer, Nikdokht Farid, Carrie R McDonald, Jona A Hattangadi-Gluth
PURPOSE: After radiation therapy (RT) to the brain, patients often experience memory impairment, which may be partially mediated by damage to the hippocampus. Hippocampal sparing in RT planning is the subject of recent and ongoing clinical trials. Calculating appropriate hippocampal dose constraints would be improved by efficient in vivo measurements of hippocampal damage. In this study we sought to determine whether brain RT was associated with dose-dependent hippocampal atrophy. METHODS AND MATERIALS: Hippocampal volume was measured with magnetic resonance imaging (MRI) in 52 patients who underwent fractionated, partial brain RT for primary brain tumors...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28059680/correlations-of-atrial-diameter-and-frontooccipital-horn-ratio-with-ventricle-size-in-fetal-ventriculomegaly
#8
Jared M Pisapia, Martin Rozycki, Hamed Akbari, Spyridon Bakas, Jayesh P Thawani, Julie S Moldenhauer, Phillip B Storm, Deborah M Zarnow, Christos Davatzikos, Gregory G Heuer
OBJECTIVE Fetal ventriculomegaly (FV), or enlarged cerebral ventricles in utero, is defined in fetal studies as an atrial diameter (AD) greater than 10 mm. In postnatal studies, the frontooccipital horn ratio (FOHR) is commonly used as a proxy for ventricle size (VS); however, its role in FV has not been assessed. Using image analysis techniques to quantify VS on fetal MR images, authors of the present study examined correlations between linear measures (AD and FOHR) and VS in patients with FV. METHODS The authors performed a cross-sectional study using fetal MR images to measure AD in the axial plane at the level of the atria of the lateral ventricles and to calculate FOHR as the average of the frontal and occipital horn diameters divided by the biparietal distance...
January 6, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28048293/su-f-t-605-implementation-of-the-conformity-gradient-index-cgi-to-intracranial-linac-based-stereotactic-plans-to-evaluate-possible-improvements-in-treatment-planning
#9
A Sandu, S Thompson, A Ayan, J Woollard, N Gupta
PURPOSE: To retrospectively evaluate the planning quality of a sample of intracranial, linac-based, dynamic arc MLC and VMAT stereotactic plans by calculating the effective gradient, Conformity Score (CGIc) and Gradient Score Index (CGIg), and determine if the Conformity/Gradient Index (CGI) may be a useful metric to guide our current treatment planning process. METHODS: We evaluated single lesion VMAT, single lesion dynamic arc, and single isocenter, 2-lesion linac-based, intracranial, VMAT treatment plans originally created in Eclipse™...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046326/su-f-t-568-qa-of-a-multi-target-multi-dose-vmat-srs
#10
D Roa, A Gonzales, J Kuo
PURPOSE: To, experimentally, corroborated the prescribed doses utilizing dosimeters (e.g. films and TLDs) that can provide high spatial resolution, allow dose measurement of multiple targets at once, and provide accurate dosimetric results. METHODS: A single-isocenter 6FFF SRS VMAT plan consisting of one 358° arc at 0° couch angle and four 179° arcs at 30°, 60°, 330° and 300° couch angles respectively, was generated in ECLIPSE v.11 using a Rando-Alderson anthropomorphic head phantom CT study...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28043956/factors-predicting-response-to-the-first-epidural-blood-patch-in-spontaneous-intracranial-hypotension
#11
Jr-Wei Wu, Shu-Shya Hseu, Jong-Ling Fuh, Jiing-Feng Lirng, Yen-Feng Wang, Wei-Ta Chen, Shih-Pin Chen, Shuu-Jiun Wang
Spontaneous intracranial hypotension results from cerebrospinal fluid leakage. Currently, the treatment of choice for spontaneous intracranial hypotension is the epidural blood patch, which has a variable response rate and no clear outcome predictors. This study aimed to identify predictors for response rate of a first targeted epidural blood patch in patients with spontaneous intracranial hypotension. We reviewed cases of patients with spontaneous intracranial hypotension who received targeted epidural blood patch at our hospital between 1 January 2007 and 1 July 2014...
January 2, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28040526/the-effect-of-treatment-of-idiopathic-intracranial-hypertension-on-prevalence-of-retinal-and-choroidal-folds
#12
Mark J Kupersmith, Patrick A Sibony, Steven E Feldon, Jui-Kai Wang, Mona Garvin, Randy Kardon
PURPOSE: We described 3 types of folds in the retina and a crease in the outer retina associated with papilledema due to idiopathic intracranial hypertension (IIH) at presentation. We report the change in folds relative to treatment of IIH over the six months. Design/Study Subjects: Substudy of a randomized clinical trial. METHODS: Study eyes of subjects assigned to acetazolamide (ACZ, n=44) or placebo (PLB, n=43) had spectral domain optical coherence tomography (SDOCT) images of the optic disc and macula regions at baseline, 3 and 6 months...
December 28, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28038797/brain-volume-and-cognitive-function-in-patients-with-revascularized-coronary-artery-disease
#13
Thomas H Ottens, Jeroen Hendrikse, Hendrik M Nathoe, Geert Jan Biessels, Diederik van Dijk
BACKGROUND: The pathogenesis of cognitive dysfunction in patients with CAD remains unclear. CAD is associated with brain atrophy and specific lesions. Detailed knowledge about the association of brain volume measured with MRI, and cognitive function in patients with CAD is lacking. We therefore investigated brain volume and cognitive function in patients with revascularized coronary artery disease (CAD), and controls without CAD. METHODS: Brain MRI scans and cognitive tests from patients with CAD were compared with data from control subjects without CAD...
December 21, 2016: International Journal of Cardiology
https://www.readbyqxmd.com/read/28031992/striatal-morphology-correlates-with-frontostriatal-electrophysiological-motor-processing-in-huntington-s-disease-an-image-hd-study
#14
Lauren M Turner, David Jakabek, Fiona A Wilkes, Rodney J Croft, Andrew Churchyard, Mark Walterfang, Dennis Velakoulis, Jeffrey C L Looi, Nellie Georgiou-Karistianis, Deborah Apthorp
BACKGROUND: Huntington's disease (HD) causes progressive atrophy to the striatum, a critical node in frontostriatal circuitry. Maintenance of motor function is dependent on functional connectivity of these premotor, motor, and dorsolateral frontostriatal circuits, and structural integrity of the striatum itself. We aimed to investigate whether size and shape of the striatum as a measure of frontostriatal circuit structural integrity was correlated with functional frontostriatal electrophysiological neural premotor processing (contingent negative variation, CNV), to better understand motoric structure-function relationships in early HD...
December 2016: Brain and Behavior
https://www.readbyqxmd.com/read/28027243/correction-of-sagittal-craniosynostosis-using-distraction-osteogenesis-based-on-strategic-categorization
#15
Myung Chul Lee, Kyu Won Shim, In Sik Yun, Eun Kyung Park, Yong Oock Kim
BACKGROUND: Distraction osteogenesis has been used to correct sagittal craniosynostosis in various ways. The purpose of this study was to introduce three distraction osteogenesis procedures by describing four objective measurements. METHODS: Fifty-four patients with sagittal synostosis were recruited and assigned to one of three therapeutic groups: group 1, anteroposterior compression with bitemporal expansion (n = 35); group 2, bitemporal expansion (n = 9); and group 3, anteroposterior expansion with bitemporal expansion (n = 10)...
January 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28026888/measurement-of-blood-flow-in-an-intracranial-artery-bypass-from-the-internal-maxillary-artery-by-intraoperative-duplex-sonography
#16
Zaitao Yu, Xiang'en Shi, Shams Raza Brohi, Hai Qian, Fangjun Liu, Yang Yang
This study explored the hemodynamic characteristics of a subcranial-intracranial bypass from the internal maxillary artery by measuring blood flow on intraoperative duplex sonography. The hemodynamic parameters of the internal maxillary artery (n = 20), radial artery (n = 20), internal maxillary artery-middle cerebral artery bypass (n = 42), and internal maxillary artery-posterior cerebral artery bypass (n = 9) were measured by intraoperative duplex sonography. There was no significant difference in the internal diameters of the internal maxillary and radial arteries (mean ± SD, 2...
December 27, 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28009020/the-relationship-of-cortical-folding-and-brain-arteriovenous-malformations
#17
Manish N Shah, Sarah E Smith, Donna L Dierker, Joseph P Herbert, Timothy S Coalson, Brent S Bruck, Gregory J Zipfel, David C Van Essen, Ralph G Dacey
BACKGROUND: The pathogenesis of human intracranial arteriovenous malformations (AVMs) is not well understood; this study aims to quantitatively assess cortical folding in patients with these lesions. METHODS: Seven adult participants, 4 male and 3 female, with unruptured, surgically unresectable intracranial AVMs were prospectively enrolled in the study, with a mean age of 42.1 years and Spetzler-Martin grade range of II-IV. High-resolution brain MRI T1 and T2 sequences were obtained...
2016: Neurovasc Imaging
https://www.readbyqxmd.com/read/27994005/associations-of-brain-structure-with-adiposity-and-changes-in-adiposity-in-a-middle-aged-and-older-biracial-population
#18
B Gwen Windham, Seth T Lirette, Myriam Fornage, Emelia J Benjamin, Kirby G Parker, Stephen T Turner, Clifford R Jack, Michael E Griswold, Thomas H Mosley
BACKGROUND: Studies of adiposity and brain pathology in African Americans (AA) are sparse despite higher rates of obesity, dementia, and dementia-associated brain pathology in AA. This study examined relations of adiposity to white matter hyperintensities (WMH) and total brain volume (TBV) in AA and non-Hispanic whites (NHW). METHODS: Waist circumference (WC) and body mass index (BMI) were measured in the Genetic Epidemiology Network of Arteriopathy study at Visits 1 (mean age 57 [±11]) and 2 (mean age 61 [±10], mean 5...
December 18, 2016: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/27991438/limitations-of-analytical-dose-calculations-for-small-field-proton-radiosurgery
#19
Changran Geng, Juliane Daartz, Kimberley Lam-Tin-Cheung, Marc Bussiere, Helen A Shih, Harald Paganetti, Jan Schuemann
The purpose of the work was to evaluate the dosimetric uncertainties of an analytical dose calculation engine and the impact on treatment plans using small fields in intracranial proton stereotactic radiosurgery (PSRS) for a gantry based double scattering system. 50 patients were evaluated including 10 patients for each of 5 diagnostic indications of: arteriovenous malformation (AVM), acoustic neuroma (AN), meningioma (MGM), metastasis (METS), and pituitary adenoma (PIT). Treatment plans followed standard prescription and optimization procedures for PSRS...
January 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27976715/heritability-of-the-shape-of-subcortical-brain-structures-in-the-general-population
#20
Gennady V Roshchupkin, Boris A Gutman, Meike W Vernooij, Neda Jahanshad, Nicholas G Martin, Albert Hofman, Katie L McMahon, Sven J van der Lee, Cornelia M van Duijn, Greig I de Zubicaray, André G Uitterlinden, Margaret J Wright, Wiro J Niessen, Paul M Thompson, M Arfan Ikram, Hieab H H Adams
The volumes of subcortical brain structures are highly heritable, but genetic underpinnings of their shape remain relatively obscure. Here we determine the relative contribution of genetic factors to individual variation in the shape of seven bilateral subcortical structures: the nucleus accumbens, amygdala, caudate, hippocampus, pallidum, putamen and thalamus. In 3,686 unrelated individuals aged between 45 and 98 years, brain magnetic resonance imaging and genotyping was performed. The maximal heritability of shape varies from 32...
December 15, 2016: Nature Communications
keyword
keyword
110655
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"