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Intracranial volume measurement

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https://www.readbyqxmd.com/read/28930850/evaluation-of-acute-normovolemic-hemodilution-in-patients-undergoing-intracranial-meningioma-resection-a-quasi-experimental-trial
#1
Lei Yang, Hui-Hui Wang, Fu-Sheng Wei, Long-Xian Ma
The aim of this study was to evaluate the safety of acute normovolemic hemodilution (ANH) for patients undergoing intracranial meningioma resection.Eighty patients (aged 48-65 years) with American Society of Anesthesiologists physical status I-II undergoing intracranial meningioma resection were included in this prospective observational study. The patients were randomly divided into group A (ANH group), which underwent a combination of ANH and intraoperative cell salvage (ICS), and group B (control group), which underwent ICS alone...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28920537/magnetic-resonance-imaging-and-brain-injury-in-the-chronic-phase-after-aneurysmal-subarachnoid-hemorrhage-a-systematic-review
#2
Bertine L Stehouwer, Lisa A van der Kleij, Jeroen Hendrikse, Gabriel Je Rinkel, Jill B De Vis
Background Case-fatality rates after aneurysmal subarachnoid hemorrhage have decreased over the past decades. However, many patients who survive an aneurysmal subarachnoid hemorrhage have long-term functional and cognitive impairments. Aims We sought to review all data on conventional brain MRI obtained in the chronic phase after aneurysmal subarachnoid hemorrhage to (1) analyze the proportion of patients with cerebral infarction or brain volume changes; (2) investigate baseline determinants predictive of MRI-detected damage; and (3) assess if brain damage is predictive of patient outcome...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28905126/neuroanatomical-correlates-of-haptic-object-processing-combined-evidence-from-tractography-and-functional-neuroimaging
#3
Haemy Lee Masson, Hyeok-Mook Kang, Laurent Petit, Christian Wallraven
Touch delivers a wealth of information already from birth, helping infants to acquire knowledge about a variety of important object properties using their hands. Despite the fact that we are touch experts as much as we are visual experts, surprisingly, little is known how our perceptual ability in touch is linked to either functional or structural aspects of the brain. The present study, therefore, investigates and identifies neuroanatomical correlates of haptic perceptual performance using a novel, multi-modal approach...
September 13, 2017: Brain Structure & Function
https://www.readbyqxmd.com/read/28899422/moderating-effects-of-sex-on-the-impact-of-diagnosis-and-amyloid-positivity-on-verbal-memory-and-hippocampal-volume
#4
Jessica Z K Caldwell, Jody-Lynn Berg, Jeffrey L Cummings, Sarah J Banks
BACKGROUND: Alzheimer's disease (AD) impacts men and women differently, but the effect of sex on predementia stages is unclear. The objective of this study was to examine whether sex moderates the impact of florbetapir positron emission tomography (PET) amyloid positivity (A(+)) on verbal learning and memory performance and hippocampal volume (HV) in normal cognition (NC) and early mild cognitive impairment (eMCI). METHODS: Seven hundred forty-two participants with NC and participants with eMCI from the Alzheimer's Disease Neuroimaging Initiative (second cohort [ADNI2] and Grand Opportunity Cohort [ADNI-GO]) were included...
September 12, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28894164/investigating-the-relationship-between-cerebrospinal-fluid-and-magnetic-induction-phase-shift-in-rabbit-intracerebral-hematoma-expansion-monitoring-by-mri
#5
Mingsheng Chen, Qingguang Yan, Jian Sun, Gui Jin, Mingxin Qin
In a prior study of intracerebral hemorrhage monitoring using magnetic induction phase shift (MIPS), we found that MIPS signal changes occurred prior to those seen with intracranial pressure. However, the characteristic MIPS alert is not yet fully explained. Combining the brain physiology and MIPS theory, we propose that cerebrospinal fluid (CSF) may be the primary factor that leads to hematoma expansion being alerted by MIPS earlier than with intracranial pressure monitoring. This paper investigates the relationship between CSF and MIPS in monitoring of rabbit intracerebral hemorrhage models, which is based on the MIPS measurements data, the quantified data on CSF from medical images and the amount of injected blood in the rabbit intracerebral hemorrhage model...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28884237/relationship-between-intracranial-aneurysms-and-the-severity-of-autosomal-dominant-polycystic-kidney-disease
#6
Hiroki Yoshida, Eiji Higashihara, Keisuke Maruyama, Kikuo Nutahara, Toshiaki Nitatori, Isao Miyazaki, Yoshiaki Shiokawa
BACKGROUND: Autosomal dominant polycystic kidney disease (ADPKD) is a hereditary kidney disease characterized by the progressive enlargement of innumerable renal cysts. Although the association of intracranial aneurysms (ICANs) with ADPKD is well known, the relationship between the ICAN and the disease severity including total kidney volume (TKV) and estimated glomerular filtration rate (eGFR) is poorly understood. METHODS: We screened 265 patients with ADPKD (mean age, 48...
September 7, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28879895/perfusion-mr-imaging-of-enhancing-brain-tumors-comparison-of-arterial-spin-labeling-technique-with-dynamic-susceptibility-contrast-technique
#7
Neetu Soni, Devender Pal S Dhanota, Sunil Kumar, Awadhesh K Jaiswal, Arun K Srivastava
OBJECTIVE: Arterial spin labeling (ASL) magnetic resonance (MR) perfusion is a noninvasive and repeatable method for quantitatively measuring cerebral blood flow (CBF). This study aims to compare measurements of ASL-derived CBF with dynamic susceptibility contrast (DSC) MRI in the assessment of enhancing brain tumors (primary and metastatic), with an aim to use ASL as an alternative to DSC. MATERIALS AND METHODS: Thirty patients with newly diagnosed brain tumors (16 meningiomas, 6 gliomas, 3 metastases, 2 cerebellopontine angle schwannoma, 1 central neurocytoma, and 2 low-grade gliomas) were examined using a 3T MR scanner...
September 2017: Neurology India
https://www.readbyqxmd.com/read/28879893/a-novel-swine-model-of-subarachnoid-hemorrhage-induced-cerebral-vasospasm
#8
Zion Zibly, Lory Fein, Mayur Sharma, Yaron Assaf, Anton Wohl, Sagi Harnof
OBJECTIVE: One of the most serious complications following subarachnoid hemorrhage (SAH) is delayed cerebral ischemia (DCI) secondary to symptomatic vasospasm. An animal model mimicking post SAH vasospasm is essential for enabling the translation of newer technologies from the conceptual phase to animal studies, and eventually to clinical trials. Various animal models of DCI following SAH have been reported, with canine models being the most common. Due to the similarity of the swine cardiovascular system and its dimensions to the human's system, the main objective of this study was to establish a consistent and quantitatively representative model of SAH-induced vasospasm in swine...
September 2017: Neurology India
https://www.readbyqxmd.com/read/28867867/computer-assisted-adjuncts-for-aneurysmal-morphologic-assessment-toward-more-precise-and-accurate-approaches
#9
Hamidreza Rajabzadeh-Oghaz, Nicole Varble, Jason M Davies, Ashkan Mowla, Hakeem J Shakir, Ashish Sonig, Hussain Shallwani, Kenneth V Snyder, Elad I Levy, Adnan H Siddiqui, Hui Meng
Neurosurgeons currently base most of their treatment decisions for intracranial aneurysms (IAs) on morphological measurements made manually from 2D angiographic images. These measurements tend to be inaccurate because 2D measurements cannot capture the complex geometry of IAs and because manual measurements are variable depending on the clinician's experience and opinion. Incorrect morphological measurements may lead to inappropriate treatment strategies. In order to improve the accuracy and consistency of morphological analysis of IAs, we have developed an image-based computational tool, AView...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28862107/collateral-scoring-on-ct-angiogram-must-evaluate-phase-and-regional-pattern
#10
Colin Casault, Abdulaziz S Al Sultan, Anurag Trivedi, Sung Il Sohn, Emmad Qazi, Matthew Bokyo, Mohammed Almekhlafi, Christopher d'Esterre, Mayank Goyal, Andrew M Demchuk, Bijoy K Menon
PURPOSE: We measured anterior cerebral artery (ACA)-middle cerebral artery (MCA) and posterior cerebral artery (PCA)-MCA pial filling on single-phase computed tomography angiograms (sCTAs) in acute ischemic stroke and correlate with the CTA-based Massachusetts General Hospital (MGH) and digital subtraction angiography (DSA)-based American Society of Interventional and Therapeutic Neuroradiology (ASITN) score. METHODS: Patients with acute stroke and M1 MCA±intracranial internal carotid artery occlusion on baseline CTA were included...
September 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28853610/white-matter-hyperintensities-in-migraine-clinical-significance-and-central-pulsatile-hemodynamic-correlates
#11
Chun-Yu Cheng, Hao-Min Cheng, Shih-Pin Chen, Chih-Ping Chung, Yung-Yang Lin, Han-Hwa Hu, Chen-Huan Chen, Shuu-Jiun Wang
Background The role of central pulsatile hemodynamics in the pathogenesis of white matter hyperintensities in migraine patients has not been clarified. Methods Sixty patients with migraine (20-50 years old; women, 68%) without overt vascular risk factors and 30 demographically-matched healthy controls were recruited prospectively. Cerebral white matter hyperintensities volume was determined by T1-weighted magnetic resonance imaging with CUBE-fluid-attenuated-inversion-recovery sequences. Central systolic blood pressure, carotid-femoral pulse wave velocity, and carotid augmentation index were measured by applanation tonometry...
January 1, 2017: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/28840277/head-and-neck-angiography-at-70%C3%A2-kvp-with-a-third-generation-dual-source-ct-system-in-patients-comparison-with-100%C3%A2-kvp
#12
Yu Chen, Xiaobo Zhang, Huadan Xue, Yuanli Zhu, Yun Wang, Yumei Li, Zhuhua Zhang, Zhengyu Jin
PURPOSE: This study was conducted in order to evaluate the image quality of 70 kVp and 25 mL contrast medium (CM) volume for head and neck computed tomographic angiography (CTA) and assess the diagnostic accuracy for arterial stenosis. METHODS: Fifty patients were prospectively divided into two groups randomly: group A (n = 25), 70 kVp with 25 mL CM, and group B (n = 25), 100 kVp with 40 mL CM. CT attenuation values, noise, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) of the shoulder, neck, and cerebral arteries were measured for objective image quality...
August 24, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28837829/precuneus-abnormalities-in-middle-aged-to-older-adults-with-depressive-symptoms-an-analysis-of-bdi-ii-symptom-dimensions
#13
Sarah M Szymkowicz, Vonetta M Dotson, Molly E McLaren, Liselotte De Wit, Deirdre M O'Shea, Francis T Talty, Andrew O'Shea, Eric C Porges, Ronald A Cohen, Adam J Woods
We recently reported age-related increases in left precuneus cortical thickness (CT) in older adults with elevated total depressive symptoms. However, it is unclear whether abnormalities in precuneus surface area (SA) are also evident and whether specific symptom dimensions of depression moderated age effects on these measurements. Seventy-three adults completed the Beck Depression Inventory - 2nd edition (BDI-II) and underwent structural neuroimaging. Measures of CT and SA were extracted from the right and left precuneus via FreeSurfer...
October 30, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28818998/lower-body-negative-pressure-reduces-optic-nerve-sheath-diameter-during-head-down-tilt
#14
Karina Marshall-Goebel, Robert Terlević, Darius A Gerlach, Simone Kuehn, Edwin Mulder, Jörn Rittweger
The microgravity ocular syndrome (MOS) results in significant structural and functional ophthalmic changes during 6-month spaceflight missions consistent with an increase in cerebrospinal fluid (CSF) pressure compared to the preflight upright position. A ground-based study was performed to assess two of the major hypothesized contributors to MOS, headward fluid shifting and increased ambient CO2, on intracranial and periorbital CSF. In addition, lower body negative pressure (LBNP) was assessed as a countermeasure to headward fluid shifting...
August 17, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28816146/quality-assessment-of-stereotactic-radiosurgery-of-a-melanoma-brain-metastases-model-using-a-mouselike-phantom-and-the-small-animal-radiation-research-platform
#15
Cheng-Chia Wu, Kunal R Chaudhary, Yong Hum Na, David Welch, Paul J Black, Adam M Sonabend, Peter Canoll, Yvonne M Saenger, Tony J C Wang, Cheng-Shie Wuu, Tom K Hei, Simon K Cheng
PURPOSE: To establish a novel preclinical model for stereotactic radiosurgery (SRS) with combined mouselike phantom quality assurance in the setting of brain metastases. METHODS AND MATERIALS: C57B6 mice underwent intracranial injection of B16-F10 melanoma cells. T1-weighted postcontrast magnetic resonance imaging (MRI) was performed on day 11 after injection. The MRI images were fused with cone beam computed tomography (CBCT) images using the Small Animal Radiation Research Platform (SARRP)...
September 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28791520/external-ventricular-drain-causes-brain-tissue-damage-an-imaging-study
#16
Fabrizio Ortolano, Marco Carbonara, Antonella Stanco, Vittorio Civelli, Giorgio Carrabba, Tommaso Zoerle, Nino Stocchetti
BACKGROUND: An external ventricular drain (EVD) is used to measure intracranial pressure (ICP) and to drain cerebrospinal fluid (CSF). The procedure is generally safe, but parenchymal sequelae are reported as a possible side effect, with variable incidence. We investigated the mechanical sequelae of EVD insertion and their clinical significance in acute brain-injured patients, with a special focus on hemorrhagic lesions. METHODS: Mechanical sequelae of EVD insertion were detected in patients by computed tomography (CT) and magnetic resonance imaging (MRI), performed for clinical purposes...
August 8, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28791500/correlation-of-volumetric-growth-and-histological-grade-in-50-meningiomas
#17
Wai Cheong Soon, Daniel M Fountain, Kacper Koczyk, Mutwakil Abdulla, Sachin Giri, Kieren Allinson, Tomasz Matys, Mathew R Guilfoyle, Ramez W Kirollos, Thomas Santarius
INTRODUCTION: Advances in radiological imaging techniques have enabled volumetric measurements of meningiomas to be easily monitored using serial imaging scans. There is limited literature on the relationship between tumour growth rates and the WHO classification of meningiomas despite tumour growth being a major determinant of type and timing of intervention. Volumetric growth has been successfully used to assess growth of low-grade glioma; however, there is limited information on the volumetric growth rate (VGR) of meningiomas...
August 9, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28777023/impact-of-neurosurgeon-specialization-on-patient-outcomes-for-intracranial-and-spinal-surgery-a-retrospective-analysis-of-the-nationwide-inpatient-sample-1998-2009
#18
Brandon A McCutcheon, Brian R Hirshman, Brandon C Gabel, Michael W Heffner, Logan P Marcus, Tyler S Cole, Clark C Chen, David C Chang, Bob S Carter
OBJECTIVE The subspecialization of neurosurgical practice is an ongoing trend in modern neurosurgery. However, it remains unclear whether the degree of surgeon specialization is associated with improved patient outcomes. The authors hypothesized that a trend toward increased neurosurgeon specialization was associated with improved patient morbidity and mortality rates. METHODS The Nationwide Inpatient Sample (NIS) was used (1998-2009). Patients were included in a spinal analysis cohort for instrumented spine surgery involving the cervical spine ( International Classification of Diseases, Ninth Revision, Clinical Modification [ICD-9-CM] codes 81...
August 4, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28769863/application-of-texture-analysis-to-study-small-vessel-disease-and-blood-brain-barrier-integrity
#19
Maria Del C Valdés Hernández, Victor González-Castro, Francesca M Chappell, Eleni Sakka, Stephen Makin, Paul A Armitage, William H Nailon, Joanna M Wardlaw
OBJECTIVES: We evaluate the alternative use of texture analysis for evaluating the role of blood-brain barrier (BBB) in small vessel disease (SVD). METHODS: We used brain magnetic resonance imaging from 204 stroke patients, acquired before and 20 min after intravenous gadolinium administration. We segmented tissues, white matter hyperintensities (WMH) and applied validated visual scores. We measured textural features in all tissues pre- and post-contrast and used ANCOVA to evaluate the effect of SVD indicators on the pre-/post-contrast change, Kruskal-Wallis for significance between patient groups and linear mixed models for pre-/post-contrast variations in cerebrospinal fluid (CSF) with Fazekas scores...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28769857/hyperventilation-therapy-for-control-of-posttraumatic-intracranial-hypertension
#20
REVIEW
Daniel Agustín Godoy, Ali Seifi, David Garza, Santiago Lubillo-Montenegro, Francisco Murillo-Cabezas
During traumatic brain injury, intracranial hypertension (ICH) can become a life-threatening condition if it is not managed quickly and adequately. Physicians use therapeutic hyperventilation to reduce elevated intracranial pressure (ICP) by manipulating autoregulatory functions connected to cerebrovascular CO2 reactivity. Inducing hypocapnia via hyperventilation reduces the partial pressure of arterial carbon dioxide (PaCO2), which incites vasoconstriction in the cerebral resistance arterioles. This constriction decrease cerebral blood flow, which reduces cerebral blood volume and, ultimately, decreases the patient's ICP...
2017: Frontiers in Neurology
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