keyword
MENU ▼
Read by QxMD icon Read
search

Functional MRI

keyword
https://www.readbyqxmd.com/read/29691604/clinical-outcome-of-arthroscopic-management-of-popliteal-cysts-with-or-without-additional-posterior-open-cystectomy
#1
Xu Xinxian, Hu Yuezheng, Lin Jian, Yu Huachen
PURPOSE: The aim of this retrospective study was to compare the clinical outcomes of arthroscopic decompression of popliteal cysts and simultaneous management of intra-articular pathologies alone or in combination with posterior open cystectomy. MATERIAL AND METHODS: This study included 65 consecutive patients with the diagnosis of popliteal cysts. Of the patients 31 received arthroscopy alone (arthroscopic decompression of cysts and management of intra-articular pathologies, AA group) and 34 received arthroscopy combined with open cystectomy (AO group)...
April 24, 2018: Der Orthopäde
https://www.readbyqxmd.com/read/29691468/large-scale-brain-network-associated-with-creative-insight-combined-voxel-based-morphometry-and-resting-state-functional-connectivity-analyses
#2
Takeshi Ogawa, Takatsugu Aihara, Takeaki Shimokawa, Okito Yamashita
Creative insight occurs with an "Aha!" experience when solving a difficult problem. Here, we investigated large-scale networks associated with insight problem solving. We recruited 232 healthy participants aged 21-69 years old. Participants completed a magnetic resonance imaging study (MRI; structural imaging and a 10 min resting-state functional MRI) and an insight test battery (ITB) consisting of written questionnaires (matchstick arithmetic task, remote associates test, and insight problem solving task)...
April 24, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29691307/effects-of-anterior-compartment-fasciotomy-on-intramuscular-compartment-pressure-in-patients-with-chronic-exertional-compartment-syndrome
#3
David Roscoe, A J Roberts, D Hulse, A F Shaheen, M P Hughes, A N Bennet
BACKGROUND: Patients with chronic exertional compartment syndrome (CECS) have pain during exercise that usually subsides at rest. Diagnosis is usually confirmed by measurement of intramuscular compartment pressure (IMCP) following exclusion of other possible causes. Management usually requires fasciotomy but reported outcomes vary widely. There is little evidence of the effectiveness of fasciotomy on IMCP. Testing is rarely repeated postoperatively and reported follow-up is poor. Improved diagnostic criteria based on preselection and IMCP levels during dynamic exercise testing have recently been reported...
April 24, 2018: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/29691250/long-term-neuroprotective-effect-of-erythropoietin-on-executive-functions-in-very-preterm-children-epokids-protocol-of-a-prospective-follow-up-study
#4
Flavia Maria Wehrle, Ulrike Held, Ruth Tuura O'Gorman, Vera Disselhoff, Barbara Schnider, Jean-Claude Fauchère, Petra Hüppi, Beatrice Latal, Cornelia Franziska Hagmann
INTRODUCTION: Premature infants are particularly vulnerable to brain injuries with associated cognitive and behavioural deficits. The worldwide first randomised interventional multicentre trial investigating the neuroprotective effects of erythropoietin (entitled 'Does erythropoietin improve outcome in very preterm infants?' (NCT00413946)) included 450 very preterm infants in Switzerland. MRI at term equivalent age showed less white matter (WM) injury in the erythropoietin group compared with the placebo group...
April 24, 2018: BMJ Open
https://www.readbyqxmd.com/read/29690796/spontaneous-bold-waves-a-novel-hemodynamic-activity-in-sprague-dawley-rat-brain-detected-by-functional-magnetic-resonance-imaging
#5
Artem Shatillo, Arto Lipponen, Raimo A Salo, Heikki Tanila, Alexei Verkhratsky, Rashid Giniatullin, Olli H Gröhn
We report spontaneous hemodynamic activity termed "Spontaneous BOLD Waves" (SBWs) detected by BOLD fMRI in Sprague-Dawley rats under medetomidine anesthesia. These SBWs, which lasted several minutes, were observed in cortex, thalamus and hippocampus. The SBWs' correlates were undetectable in electrophysiological recordings, suggesting an exclusive gliovascular phenomenon dissociated from neuronal activity. SBWs were insensitive to the NMDA receptors antagonist MK-801 but were inhibited by the α1-adrenoceptor blocker prazosin...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29689556/assessment-of-placental-perfusion-in-the-preeclampsia-l-name-rat-model-with-high-field-dynamic-contrast-enhanced-mri
#6
Marie Lémery Magnin, Victor Fitoussi, Nathalie Siauve, Laetitia Pidial, Daniel Balvay, Gwennhael Autret, Charles André Cuenod, Olivier Clément, Laurent Julien Salomon
PURPOSE: To evaluate placental function and perfusion in a rat model of preeclampsia infused with L-nitro-arginine methyl ester (L-NAME) by dynamic contrast-enhanced (DCE) MRI using gadolinium chelates. METHODS: Pregnant female Sprague-Dawley rats were fitted on embryonic day 16 (E16) with subcutaneous osmotic minipumps loaded to deliver, continuously, L-NAME (50 mg/day per rat; case group) or saline solution (control group). DCE MRI was performed on E19 using gadolinium chelates and a 4...
April 24, 2018: Fetal Diagnosis and Therapy
https://www.readbyqxmd.com/read/29689381/on-the-use-of-superparamagnetic-hydroxyapatite-nanoparticles-as-an-agent-for-magnetic-and-nuclear-in-vivo-imaging
#7
Alessio Adamiano, Michele Iafisco, Monica Sandri, Martina Basini, Paolo Arosio, Tamara Canu, Giovanni Sitia, Antonio Esposito, Vincenzo Iannotti, Giovanni Ausanio, Eirini Fragogeorgi, Maritina Rouchota, George Loudos, Alessandro Lascialfari, Anna Tampieri
The identification of alternative biocompatible magnetic NPs for advanced clinical application is becoming an important need due to raising concerns about iron accumulation in soft issues associated to the administration of superparamagnetic iron oxide nanoparticles (NPs). Here, we report on the performance of previously synthetized iron-doped hydroxyapatite (FeHA) NPs as contrast agent for magnetic resonance imaging (MRI). The MRI contrast abilities of FeHA and Endorem® (dextran coated iron oxide NPs) were assessed by 1 H nuclear magnetic resonance relaxometry and their performance in healthy mice was monitored by a 7 Tesla scanner...
April 21, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29689374/body-mass-index-and-its-relation-to-neuropsychological-functioning-and-brain-volume-in-healthy-older-adults
#8
Marissa Ann Gogniat, Talia Loren Robinson, Catherine Mattocks Mewborn, Kharine Renee Jean, L Stephen Miller
Obesity is a growing concern worldwide because of its adverse health effects, including its negative impact on cognitive functioning. This concern is especially relevant for older adults, who are already likely to experience some cognitive decline and loss of brain volume due to aging [63,13]. However, there is some evidence that higher body mass index (BMI) may actually be protective in later life [8-11]. Therefore, the purpose of the current study was to assess the relationship between BMI and neuropsychological functioning in older adults, and concurrently the relationship between BMI and brain volume...
April 21, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29689135/intravenous-thrombolysis-in-unwitnessed-stroke-onset-mr-witness-trial-results
#9
Lee H Schwamm, Ona Wu, Shlee S Song, Lawrence L Latour, Andria L Ford, Amie W Hsia, Alona Muzikansky, Rebecca A Betensky, Albert J Yoo, Michael H Lev, Gregoire Boulouis, Arne Lauer, Pedro Cougo, William A Copen, Gordon J Harris, Steven Warach
OBJECTIVE: Most acute ischemic stroke (AIS) patients with unwitnessed symptom onset are ineligible for intravenous thrombolysis due to timing alone. Lesion evolution on FLAIR MRI correlates with stroke duration, and quantitative mismatch of diffusion-weighted MRI (DWI) with FLAIR (qDFM) might indicate stroke duration within guideline-recommended thrombolysis. We tested if intravenous thrombolysis ≤4.5 h from time of symptom discovery is safe in patients with qDFM in an open-label, phase 2a, prospective study (NCT01282242)...
April 24, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29688876/neuroanatomical-phenotypes-in-mental-illness-identifying-convergent-and-divergent-cortical-phenotypes-across-autism-adhd-and-schizophrenia
#10
Min Tae M Park, Armin Raznahan, Philip Shaw, Nitin Gogtay, Jason P Lerch, M Mallar Chakravarty
BACKGROUND: There is evidence suggesting neuropsychiatric disorders share genomic, cognitive and clinical features. Here, we ask if autism-spectrum disorders (ASD), attention-deficit/hyperactivity disorder (ADHD) and schizophrenia share neuroanatomical variations. METHODS: First, we used measures of cortical anatomy to estimate spatial overlap of neuroanatomical variation using univariate methods. Next, we developed a novel methodology to determine whether cortical deficits specifically target or are "enriched" within functional resting-state networks...
May 2018: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29688873/assessing-the-marks-of-change-how-psychotherapy-alters-the-brain-structure-in-women-with-borderline-personality-disorder
#11
Falk Mancke, Ruth Schmitt, Dorina Winter, Inga Niedtfeld, Sabine C Herpertz, Christian Schmahl
BACKGROUND: There is increasing evidence that psychotherapy can alter the function of the brain of patients with borderline personality disorder (BPD). However, it is not known whether psychotherapy can also modify the brain structure of patients with BPD. METHODS: We used structural MRI data of female patients with BPD before and after participation in 12 weeks of residential dialectical behavioural therapy (DBT) and compared them to data from female patients with BPD who received treatment as usual (TAU)...
May 2018: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29688872/neural-correlates-of-emotional-action-control-in-anger-prone-women-with-borderline-personality-disorder
#12
Katja Bertsch, Karin Roelofs, Paul Jonathan Roch, Bo Ma, Saskia Hensel, Sabine C Herpertz, Inge Volman
BACKGROUND: Difficulty in controlling emotional impulses is a crucial component of borderline personality disorder (BPD) that often leads to destructive, impulsive behaviours against others. In line with recent findings in aggressive individuals, deficits in prefrontal amygdala coupling during emotional action control may account for these symptoms. METHODS: To study the neurobiological correlates of altered emotional action control in individuals with BPD, we asked medication-free, anger-prone, female patients with BPD and age- and intelligence-matched healthy women to take part in an approach-avoidance task while lying in an MRI scanner...
May 2018: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29688388/brain-properties-predict-proximity-to-symptom-onset-in-sporadic-alzheimer-s-disease
#13
Jacob W Vogel, Etienne Vachon-Presseau, Alexa Pichet Binette, Angela Tam, Pierre Orban, Renaud La Joie, Mélissa Savard, Cynthia Picard, Judes Poirier, Pierre Bellec, John C S Breitner, Sylvia Villeneuve
Alzheimer's disease is preceded by a lengthy 'preclinical' stage spanning many years, during which subtle brain changes occur in the absence of overt cognitive symptoms. Predicting when the onset of disease symptoms will occur is an unsolved challenge in individuals with sporadic Alzheimer's disease. In individuals with autosomal dominant genetic Alzheimer's disease, the age of symptom onset is similar across generations, allowing the prediction of individual onset times with some accuracy. We extend this concept to persons with a parental history of sporadic Alzheimer's disease to test whether an individual's symptom onset age can be informed by the onset age of their affected parent, and whether this estimated onset age can be predicted using only MRI...
April 23, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29687916/mri-based-wireless-determination-of-the-transfer-function-of-a-linear-implant-introduction-of-the-transfer-matrix
#14
Janot P Tokaya, Alexander J E Raaijmakers, Peter R Luijten, Cornelis A T van den Berg
PURPOSE: We introduce the transfer matrix (TM) that makes MR-based wireless determination of transfer functions (TFs) possible. TFs are implant specific measures for RF-safety assessment of linear implants. The TF relates an incident tangential electric field on an implant to a scattered electric field at its tip that generally governs local heating. The TM extends this concept and relates an incident tangential electric field to a current distribution in the implant therewith characterizing the RF response along the entire implant...
April 24, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29687732/characterization-of-the-spatial-structure-of-local-functional-connectivity-using-multi-distance-average-correlation-measures
#15
Didac Macia, Jesus Pujol, Laura Blanco-Hinojo, Gerard Martínez-Vilavella, Rocío Martín-Santos, Joan Deus
There is ample evidence from basic research in neuroscience of the importance of local cortico-cortical networks. Millimetric resolution is achievable with current functional MRI (fMRI) scanners and sequences, and consequently a number of "local" activity similarity measures have been defined to describe patterns of segregation and integration at this spatial scale. We have introduced the use of Iso-Distant local Average Correlation (IDAC), easily defined as the average fMRI temporal correlation of a given voxel with other voxels placed at increasingly separated iso-distant intervals, to characterize the curve of local fMRI signal similarities...
April 24, 2018: Brain Connectivity
https://www.readbyqxmd.com/read/29687717/exploiting-the-proton-exchange-as-an-additional-route-to-enhance-the-relaxivity-of-paramagnetic-mri-contrast-agents
#16
Silvio Aime, Simona Baroni, Daniela Delli Castelli, Ernő Brücher, István Fábián, Sonia Colombo Serra, Alberto Fringuello Mingo, Roberta Napolitano, Luciano Lattuada, Fabio Tedoldi, Zsolt Baranyai
The relaxivity of Gd(HP-DO3A) was studied as a function of pH and buffer composition in order to identify the main factors of the observed relaxation enhancement due to the exchange of the coordinated hydroxyl proton. It was established that the paramagnetic relaxation time, T1M , of the coordinated hydroxyl proton is about 50% shorter than that of the protons in the coordinated water molecule. The control of the p K of the coordinated alcoholic -OH moiety in the ligand is fundamental to utilize the proton exchange enhanced relaxivity under physio/pathologic conditions...
April 24, 2018: Inorganic Chemistry
https://www.readbyqxmd.com/read/29687537/incidence-and-outcomes-of-incidental-breast-lesions-detected-on-cross-sectional-imaging-examinations
#17
Eniola Falomo, Roberta M Strigel, Richard Bruce, Alejandro Munoz Del Rio, Catherine Adejumo, Frederick Kelcz
The aim of this study was to determine the frequency and outcomes of incidental breast lesions detected on nonbreast specific cross-sectional imaging examinations. A retrospective review of the medical records was performed to identify all patients without a known history of breast cancer, who had an incidentally discovered breast lesion detected on a nonbreast imaging examination performed at our institution between September 2008 and August 2012 for this IRB-approved, HIPAA compliant study. Outcomes of the incidental lesions were determined by follow-up with dedicated breast imaging (mammography, breast ultrasound, and/or breast MRI) or results of biopsy, if performed...
April 23, 2018: Breast Journal
https://www.readbyqxmd.com/read/29687532/altered-structural-and-functional-connectivity-of-the-insula-in-functional-dyspepsia
#18
P Liu, Y Fan, Y Wei, F Zeng, R Li, N Fei, W Qin
BACKGROUND: Functional dyspepsia (FD) is a common functional gastrointestinal disease. Neuroimaging studies have identified that insula is involved in the pathogenesis of FD. However, less is known about structural and functional connectivity of insula in FD. METHODS: In this study, 67 FD patients and 46 healthy controls (HCs) underwent structural MRI, resting-state functional MRI, diffusion tensor imaging (DTI) scans, and clinical assessment. We used the 3 neuroimaging modalities to investigate structural and functional connectivity of insula between FD patients and HCs, and we examined relationships between the neuroimaging findings and clinical symptoms...
April 23, 2018: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29687161/obstetric-patients-perspectives-on-functional-magnetic-neuroimaging-research-in-pregnant-women
#19
Rebecca L Newmark, Michelle L Zaydlin, Amy Yang, Kelcie Kuchenrither, Katherine L Wisner, Suena H Massey
Magnetic resonance neuroimaging (MRI) studies of healthy pregnant women could identify key mechanisms of spontaneous health behavior changes observed in expectant mothers as novel intervention targets, but are currently unprecedented. As balancing potential benefits of research with unknown risks, including participant perceptions of risk, is foundational to ethical conduct, we surveyed a convenience obstetric sample to understand pregnant women's perspectives on this issue. Respondents were 76 pregnant women (modal age of 30-39 years; 64% multiparous) presenting for obstetric care from April to June 2016 at privately and publicly funded clinics at an urban academic medical center in the Midwestern USA...
April 23, 2018: Archives of Women's Mental Health
https://www.readbyqxmd.com/read/29687028/deep-cerebral-vein-expansion-with-metabolic-and-neurocognitive-recovery-in-sturge-weber-syndrome
#20
Flóra John, Mohsin Maqbool, Jeong-Won Jeong, Rajkumar Agarwal, Michael E Behen, Csaba Juhász
We present longitudinal imaging data of a child with Sturge-Weber syndrome (SWS). At age 8 months, 3 weeks after initial seizures and prolonged motor deficit, MRI showed extensive right hemispheric SWS involvement with severe glucose hypometabolism on PET. She was treated with levetiracetam and aspirin. Follow-up imaging at age 29 months showed a robust interval expansion of enlarged deep medullary veins throughout the affected hemisphere along with a dramatic recovery of hemispheric metabolism and normalized neurocognitive functioning...
April 2018: Annals of Clinical and Translational Neurology
keyword
keyword
2447
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"