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https://www.readbyqxmd.com/read/28643354/diffusion-mri-microstructure-models-with-in-vivo-human-brain-connectome-data-results-from-a-multi-group-comparison
#1
Uran Ferizi, Benoit Scherrer, Torben Schneider, Mohammad Alipoor, Odin Eufracio, Rutger H J Fick, Rachid Deriche, Markus Nilsson, Ana K Loya-Olivas, Mariano Rivera, Dirk H J Poot, Alonso Ramirez-Manzanares, Jose L Marroquin, Ariel Rokem, Christian Pötter, Robert F Dougherty, Ken Sakaie, Claudia Wheeler-Kingshott, Simon K Warfield, Thomas Witzel, Lawrence L Wald, José G Raya, Daniel C Alexander
A large number of mathematical models have been proposed to describe the measured signal in diffusion-weighted (DW) magnetic resonance imaging (MRI). However, model comparison to date focuses only on specific subclasses, e.g. compartment models or signal models, and little or no information is available in the literature on how performance varies among the different types of models. To address this deficiency, we organized the 'White Matter Modeling Challenge' during the International Symposium on Biomedical Imaging (ISBI) 2015 conference...
June 23, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28643347/off-resonance-based-assessment-of-metallic-wear-debris-near-total-hip-arthroplasty
#2
Kevin M Koch, Matthew F Koff, Thomas W Bauer, Parina H Shah, Andrew S Nencka, S Sivaram Kaushik, Hollis G Potter
PURPOSE: The presence of metallic debris near total hip arthroplasty can have a significant impact on longitudinal patient management. Methods for magnetic resonance imaging-based quantification of metallic debris near painful total hip replacements are described and applied to cohorts of symptomatic and control subject cases. METHODS: A combination of metal artifact reduction, off-resonance mapping, off-resonance background removal, and spatial clustering methods are utilized to quantify off-resonance signatures in cases of suspected metallosis...
June 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28643038/prevalence-of-cerebral-cavernous-malformations-associated-with-developmental-venous-anomalies-increases-with-age
#3
Waleed Brinjikji, Ali El-Rida El-Masri, John T Wald, Kelly D Flemming, Giuseppe Lanzino
BACKGROUND AND PURPOSE: To test the hypothesis that the prevalence of cerebral cavernous malformation (CCM) associated with developmental venous anomalies (DVAs) increases with age, we studied the age-related prevalence of DVA-associated CCM among patients with DVAs. MATERIALS AND METHODS: Patients with DVAs on contrast-enhanced MRI exams performed over a 2-year period were included in this study. A single neuroradiologist reviewed all imaging exams for the presence of CCMs...
June 22, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28638200/brain-gamma-aminobutyric-acid-gaba-concentration-of-the-prefrontal-lobe-in-unmedicated-patients-with-obsessive-compulsive-disorder-a-research-of-magnetic-resonance-spectroscopy
#4
Zongfeng Zhang, Qing Fan, Yanle Bai, Zhen Wang, Haiyin Zhang, Zeping Xiao
BACKGROUND: In recent years, a large number of neuroimaging studies found that the Cortico-Striato- Thalamo-Cortical circuit (CSTC), including the prefrontal lobe, a significant part of CSTC, has disturbance metabolically in patients with Obsessive-Compulsive Disorder (OCD). AIM: Explore the correlation between the neuro-metabolic features and clinical characteristics of OCD patients using magnetic resonance spectroscopy technology. METHODS: 88 patients with OCD who were not received medication and outpatient treatment for 8 weeks and 76 health controls were enrolled, there was no significant difference in gender, age or education level between the two groups...
October 25, 2016: Shanghai Archives of Psychiatry
https://www.readbyqxmd.com/read/28629558/is-there-a-trend-in-ct-scanning-scaphoid-nonunions-for-deformity-assessment-a-systematic-review
#5
REVIEW
Paul W L Ten Berg, Marieke G A de Roo, Mario Maas, Simon D Strackee
PURPOSE: The effect of scaphoid nonunion deformity on wrist function is uncertain due to the lack of reliable imaging tools. Advanced three-dimensional (3-D) computed tomography (CT)-based imaging techniques may improve deformity assessment by using a mirrored image of the contralateral intact wrist as anatomic reference. The implementation of such techniques depends on the extent to which conventional CT is currently used in standard practice. The purpose of this systematic review of medical literature was to analyze the trend in CT scanning scaphoid nonunions, either unilaterally or bilaterally...
June 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28627295/socialization-of-prosocial-behavior-gender-differences-in-the-mediating-role-of-child-brain-volume
#6
Rianne Kok, Peter Prinzie, Marian J Bakermans-Kranenburg, Frank C Verhulst, Tonya White, Henning Tiemeier, Marinus H van IJzendoorn
Evidence has been accumulating for the impact of normal variation in caregiving quality on brain morphology in children, but the question remains whether differences in brain volume related to early caregiving translate to behavioral implications. In this longitudinal population-based study (N = 162), moderated mediation was tested for the relation between parental sensitivity and child prosocial behavior via brain volume, in boys and girls. Both maternal and paternal sensitivity were repeatedly observed between 1 and 4 years of age...
June 18, 2017: Child Neuropsychology: a Journal on Normal and Abnormal Development in Childhood and Adolescence
https://www.readbyqxmd.com/read/28622141/analysis-of-structural-brain-mri-and-multi-parameter-classification-for-alzheimer-s-disease
#7
Yingteng Zhang, Shenquan Liu
Incorporating with machine learning technology, neuroimaging markers which extracted from structural Magnetic Resonance Images (sMRI), can help distinguish Alzheimer's Disease (AD) patients from Healthy Controls (HC). In the present study, we aim to investigate differences in atrophic regions between HC and AD and apply machine learning methods to classify these two groups. T1-weighted sMRI scans of 158 patients with AD and 145 age-matched HC were acquired from the ADNI database. Five kinds of parameters (i...
June 15, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28618361/diffusion-tensor-mri-tractography-reveals-increased-fractional-anisotropy-fa-in-arcuate-fasciculus-following-music-cued-motor-training
#8
Emma Moore, Rebecca S Schaefer, Mark E Bastin, Neil Roberts, Katie Overy
Auditory cues are frequently used to support movement learning and rehabilitation, but the neural basis of this behavioural effect is not yet clear. We investigated the microstructural neuroplasticity effects of adding musical cues to a motor learning task. We hypothesised that music-cued, left-handed motor training would increase fractional anisotropy (FA) in the contralateral arcuate fasciculus, a fibre tract connecting auditory, pre-motor and motor regions. Thirty right-handed participants were assigned to a motor learning condition either with (Music Group) or without (Control Group) musical cues...
August 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28617321/evolving-identification-of-blood-cells-associated-with-clinically-isolated-syndrome-importance-of-time-since-clinical-presentation-and-diagnostic-mri
#9
Stephanie Trend, Anderson P Jones, Sian Geldenhuys, Scott N Byrne, Marzena J Fabis-Pedrini, David Nolan, David R Booth, William M Carroll, Robyn M Lucas, Allan G Kermode, Prue H Hart
It is not clear how the profile of immune cells in peripheral blood differs between patients with clinically isolated syndrome (CIS) and healthy controls (HC). This study aimed to identify a CIS peripheral blood signature that may provide clues for potential immunomodulatory approaches early in disease. Peripheral blood mononuclear cells (PBMCs) were collected from 18 people with CIS, 19 HC and 13 individuals with other demyelinating conditions (ODC) including multiple sclerosis (MS). Individuals with CIS separated into two groups, namely those with early (≤14 days post-diagnostic magnetic resonance imaging (MRI); n = 6) and late (≥27 days; n = 12) blood sampling...
June 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28612049/episodic-tags-enhance-striatal-valuation-signals-during-temporal-discounting-in-pathological-gamblers
#10
Antonius Wiehler, Frederike Hermi Petzschner, Klaas Enno Stephan, Jan Peters
Similar to many addiction disorders, pathological gambling is associated with an increased preference for immediate rewards (steep temporal discounting). In healthy participants, episodic future thinking has been shown to reduce impulsivity during intertemporal choice. Here, we examine for the first time a modulation of temporal discounting via episodic future thinking in a group of pathological gamblers. We investigated a sample of 24 pathological gamblers and 24 matched healthy controls with functional magnetic resonance imaging (fMRI)...
May 2017: ENeuro
https://www.readbyqxmd.com/read/28611943/association-between-serum-thyroid-stimulating-hormone-levels-and-visceral-adipose-tissue-a-population-based-study-in-northeast-germany
#11
Tilman Witte, Henry Völzke, Markus M Lerch, Katrin Hegenscheid, Nele Friedrich, Till Ittermann, John A Batsis
BACKGROUND: Abdominal obesity is a major driver for adverse medical conditions. While an interaction between adipose tissue and thyroid function is thought to exist, to our knowledge, no study has examined the effect of thyroid-stimulating hormone (TSH) on visceral adipose tissue (VAT) in a population-based context. OBJECTIVE: We determined an association between serum TSH levels and VAT. METHODS: A sample of 1,021 female and 956 male adults aged 20-79 years was drawn from registry offices in the cross-sectional, population-based Study of Health in Pomerania Trend (SHIP Trend) in Northeast Germany from 2008 to 2012...
February 2017: European Thyroid Journal
https://www.readbyqxmd.com/read/28611080/magnetic-resonance-imaging-assessed-inflammation-in-the-wrist-is-associated-with-patient-reported-physical-impairment-global-assessment-of-disease-activity-and-pain-in-early-rheumatoid-arthritis-longitudinal-results-from-two-randomised-controlled-trials
#12
Daniel Glinatsi, Joshua F Baker, Merete L Hetland, Kim Hørslev-Petersen, Bo J Ejbjerg, Kristian Stengaard-Pedersen, Peter Junker, Torkell Ellingsen, Hanne M Lindegaard, Ib Hansen, Tine Lottenburger, Jakob M Møller, Lykke Ørnbjerg, Aage Vestergaard, Anne Grethe Jurik, Henrik S Thomsen, Trine Torfing, Signe Møller-Bisgaard, Mette B Axelsen, Mikkel Østergaard
OBJECTIVES: To examine whether MRI assessed inflammation and damage in the wrist of patients with early rheumatoid arthritis (RA) are associated with patient-reported outcomes (PROs). METHODS: Wrist and hand MRIs of 210 patients with early RA from two investigator-initiated, randomised controlled studies (CIMESTRA/OPERA) were assessed according to the Outcome Measures in Rheumatology RA MRI score (RAMRIS) for synovitis, tenosynovitis, osteitis, bone erosions and joint space narrowing (JSN) at baseline, 1 and 5 years follow-up...
June 13, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28609385/association-between-menopause-and-lumbar-disc-degeneration-an-mri-study-of-1-566-women-and-1-382-men
#13
Chao Lou, Hongliang Chen, Liangwei Mei, Weiyang Yu, Kejun Zhu, Feijun Liu, Zhenzhong Chen, Guangheng Xiang, Minjiang Chen, Qiaoyou Weng, Dengwei He
OBJECTIVE: The aim of this study was to revisit and further investigate the association between menopause and disc degeneration in the lumbar spine using a magnetic resonance imaging-based eight-level grading system. METHODS: This study cohort comprised of 1,566 women and 1,382 age-matched men who were admitted for low back pain from June 2013 to October 2016. Data on age, weight, height, body mass index, age at natural menopause, and years since menopause (YSM) were obtained...
June 12, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28597337/brain-reward-responses-to-food-stimuli-among-female-monozygotic-twins-discordant-for-bmi
#14
Stieneke Doornweerd, Eco J De Geus, Frederik Barkhof, Liselotte Van Bloemendaal, Dorret I Boomsma, Jenny Van Dongen, Madeleine L Drent, Gonneke Willemsen, Dick J Veltman, Richard G IJzerman
Obese individuals are characterized by altered brain reward responses to food. Despite the latest discovery of obesity-associated genes, the contribution of environmental and genetic factors to brain reward responsiveness to food remains largely unclear. Sixteen female monozygotic twin pairs with a mean BMI discordance of 3.96 ± 2.1 kg/m(2) were selected from the Netherlands Twin Register to undergo functional MRI scanning while watching high- and low-calorie food and non-food pictures and during the anticipation and receipt of chocolate milk...
June 8, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28583630/evaluating-the-effect-of-rectal-distension-on-prostate-multiparametric-mri-image-quality
#15
Iztok Caglic, Nienke L Hansen, Rhys A Slough, Andrew J Patterson, Tristan Barrett
PURPOSE: To evaluate the effect of rectal distension on the quality of anatomical and functional prostate multiparametric (mp) MRI. MATERIALS AND METHODS: Multiparametric (mp) 3T-MRI images of 173 patients were independently evaluated by two radiologists in this retrospective study. Planimetry rectal volumes were derived and a subjective assessment of rectal distension was made using a 5-point Likert scale (1=no stool/gas, 5=large amount of stool/gas). Image quality of diffusion-weighted imaging (DWI) was evaluated using a 5-point Likert scale...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28581412/dosimetric-impact-of-using-a-virtual-couch-shift-for-online-correction-of-setup-errors-for-brain-patients-on-an-integrated-high-field-magnetic-resonance-imaging-linear-accelerator
#16
Mark Ruschin, Arjun Sahgal, Chia-Lin Tseng, Marcus Sonier, Brian Keller, Young Lee
PURPOSE: To quantify the dosimetric impact of using virtual couch shift (VCS) for correcting setup errors in glioblastoma multiforme (GBM) patients treated on a magnetic resonance imaging (MRI)-linac. METHODS AND MATERIALS: Six GBM patients treated with 60 Gy (30 fractions) were selected for this simulation study. For each case, 2 reference plans were generated in the MRL treatment planning system: With (WIB) and with no (NOB) MRI B field present. Subsequently, 2-mm, 4-mm, and 6-mm translational errors were simulated and corrected for using a VCS method based on shift-only, warm start segment weight (SWO), and segment weight and shape (SSO) optimization...
July 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28580763/knowledge-based-reconstruction-for-measurement-of-right-ventricular-volumes-on-cardiovascular-magnetic-resonance-images-in-a-mixed-population
#17
Elise D Pieterman, Ricardo P J Budde, Daniëlle Robbers-Visser, Ron T van Domburg, Willem A Helbing
OBJECTIVE: Follow-up of right ventricular performance is important for patients with congenital heart disease. Cardiac magnetic resonance imaging is optimal for this purpose. However, observer-dependency of manual analysis of right ventricular volumes limit its use. Knowledge-based reconstruction is a new semiautomatic analysis tool that uses a database including knowledge of right ventricular shape in various congenital heart diseases. We evaluated whether knowledge-based reconstruction is a good alternative for conventional analysis...
June 5, 2017: Congenital Heart Disease
https://www.readbyqxmd.com/read/28580400/replacement-of-daily-load-attenuates-but-does-not-prevent-changes-to-the-musculoskeletal-system-during-bed-rest
#18
Peter R Cavanagh, Andrea J Rice, Sara C Novotny, Kerim O Genc, Ricki K Englehaupt, Tammy M Owings, Bryan Comstock, Tamre Cardoso, Hakan Ilaslan, Scott M Smith, Angelo A Licata
The dose-response effects of exercise in reduced gravity on musculoskeletal health have not been well documented. It is not known whether or not individualized exercise prescriptions can be effective in preventing the substantial loss in bone mineral density and muscle function that have been observed in space flight and in bed rest. In this study, typical daily loads to the lower extremities were quantified in free-living subjects who were then randomly assigned to control or exercise groups. Subjects were confined to 6-degree head-down bed rest for 84 days...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28580383/resection-of-granulomatous-tissue-resolves-silicone-induced-hypercalcemia
#19
Beatrice J Edwards, Smita Saraykar, Ming Sun, William A Murphy, Pei Lin, Robert Gagel
Because of the increasing trend of body contour enhancements with injections, implants, and fillers, clinicians should be on high alert for the possibility of silicone-induced hypercalcemia as one of the differential diagnoses in a patient with history of silicone use. Hypercalcemia as a result of silicone injections has been reported, and there is concern that there will be more cases given the popularity of cosmetic silicone. Cases involved a mother and daughter (70 & 55 years) who presented in 2013 with hypercalcemia after cosmetic silicone injections in 2007...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28579146/myelin-breakdown-in-human-huntington-s-disease-multi-modal-evidence-from-diffusion-mri-and-quantitative-magnetization-transfer
#20
José Bourbon-Teles, Sonya Bells, Derek K Jones, Elizabeth Coulthard, Anne Rosser, Claudia Metzler-Baddeley
Huntington's disease (HD) leads to white matter (WM) degeneration that may be due to an early breakdown in axon myelination but in vivo imaging correlates of demyelination remain relatively unexplored in HD compared to other neurodegenerative diseases. This study investigated HD-related effects on a putative marker of myelin, the macromolecular proton fraction (MMPF) from quantitative magnetization transfer and on fractional anisotropy, axial and radial diffusivity from diffusion tensor MR-imaging. Microstructural differences were studied in WM pathways of the basal ganglia and motor systems known to be impaired in HD: the corpus callosum, the cortico-spinal tract, the anterior thalamic radiation, fibers between prefrontal cortex and caudate and between supplementary motor area and putamen...
June 1, 2017: Neuroscience
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