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https://www.readbyqxmd.com/read/28736467/stability-of-gradient-field-corrections-for-quantitative-diffusion-mri
#1
Baxter P Rogers, Justin Blaber, E Brian Welch, Zhaohua Ding, Adam W Anderson, Bennett A Landman
In magnetic resonance diffusion imaging, gradient nonlinearity causes significant bias in the estimation of quantitative diffusion parameters such as diffusivity, anisotropy, and diffusion direction in areas away from the magnet isocenter. This bias can be substantially reduced if the scanner- and coil-specific gradient field nonlinearities are known. Using a set of field map calibration scans on a large (29 cm diameter) phantom combined with a solid harmonic approximation of the gradient fields, we predicted the obtained b-values and applied gradient directions throughout a typical field of view for brain imaging for a typical 32-direction diffusion imaging sequence...
February 11, 2017: Proceedings of SPIE
https://www.readbyqxmd.com/read/28731893/validity-of-administrative-data-in-identifying-cancer-related-events-in-adolescents-and-young-adults-a-population-based-study-using-the-impact-cohort
#2
Sumit Gupta, Paul C Nathan, Nancy N Baxter, Cindy Lau, Corinne Daly, Jason D Pole
BACKGROUND: Despite the importance of estimating population level cancer outcomes, most registries do not collect critical events such as relapse. Attempts to use health administrative data to identify these events have focused on older adults and have been mostly unsuccessful. We developed and tested administrative data-based algorithms in a population-based cohort of adolescents and young adults with cancer. METHODS: We identified all Ontario adolescents and young adults 15-21 years old diagnosed with leukemia, lymphoma, sarcoma, or testicular cancer between 1992-2012...
July 20, 2017: Medical Care
https://www.readbyqxmd.com/read/28731802/neurovascular-structures-at-risk-with-curved-retrograde-ttc-fusion-nails
#3
Cesar de Cesar Netto, David Johannesmeyer, Brent Cone, Ibukunoluwa Araoye, Parke William Hudson, Bahman Sahranavard, Michael Johnson, Ashish Shah
BACKGROUND: The purpose of this study was to assess the risk of iatrogenic injury to plantar neurovascular structures of the foot during insertion of a curved retrograde tibiotalocalcaneal (TTC) fusion nail. MATERIAL AND METHODS: Ten below-knee thawed fresh-frozen cadaveric specimens underwent curved retrograde nailing of the ankle. The shortest distance between the nail and the main plantar neurovascular branches and injured structures were recorded during dissection...
July 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28731405/pro-death-nmda-receptor-signaling-is-promoted-by-the-glun2b-c-terminus-independently-of-dapk1
#4
Jamie McQueen, Tomas J Ryan, Sean McKay, Katie Fm Marwick, Paul E Baxter, Sarah M Carpanini, Thomas M Wishart, Thomas H Gillingwater, Jean C Manson, David Ja Wyllie, Seth Gn Grant, Barry McColl, Noboru Komiyama, Giles E Hardingham
Aberrant NMDA receptor (NMDAR) activity contributes to several neurological disorders, but direct antagonism is poorly tolerated therapeutically. The GluN2B cytoplasmic C-terminal domain (CTD) represents an alternative therapeutic target since it potentiates excitotoxic signaling. The key GluN2B CTD-centred event in excitotoxicity is proposed to involve its phosphorylation at Ser-1303 by DAPK1, that is blocked by a neuroprotective cell-permeable peptide mimetic of the region. Contrary to this model, we find that excitotoxicity can proceed without increased Ser-1303 phosphorylation, and is unaffected by DAPK1 deficiency in vitro or following ischemia in vivo...
July 21, 2017: ELife
https://www.readbyqxmd.com/read/28728526/-i-m-still-here-i-m-still-alive-understanding-successful-aging-in-the-context-of-hiv
#5
Patricia Solomon, Lori Letts, Kelly K O'Brien, Stephanie Nixon, Larry Baxter, Nicole Gervais
As people living with HIV (PLWH) live longer, increased understanding of individuals' values and perceptions of successful aging can assist health providers in working with PLWH to set meaningful goals as they age. The purpose of this qualitative study was to understand how PLWH define successful aging and their perceptions of contributors to successful aging. Fourteen men and ten women over the age of 50 years (mean age 57 years; mean time since diagnosis 18 years) participated in individual interviews. Interviews were analyzed using directed content analysis...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28727652/surgical-emphysema-following-canalplasty-for-aural-exostoses
#6
Michael C Baxter, Matthew Keller, Anil Shah, Sean Wise
OBJECTIVE: To describe the presentation and management of surgical emphysema involving the temporomandibular joint and deep neck following exostoses removal. PATIENT: A 60-year-old male surfer presented with hearing loss and recurrent infections in the right ear. An examination revealed obstructing bony exostoses in the right external auditory canal. He underwent right canalplasty using a postauricular approach. At 5 weeks after surgery, he presented with right otalgia, swelling of the right face and neck, and complaints of a squeaking noise in the right ear with mandibular excursions...
July 19, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28724464/refractory-longitudinally-extensive-transverse-myelitis-responsive-to-cyclophosphamide
#7
Laura J Baxter, Shuo Chen, Philippe Couillard, James N Scott, Christopher J Doig, Fiona Costello, Louis P Girard, John Klassen, Jodie M Burton
Severe longitudinally extensive transverse myelitis (LETM) can cause quadriplegia, marked sensory dysfunction, and respiratory failure. Some patients are unresponsive to conventional immune therapy. We report two cases of severe immune-mediated LETM requiring intensive care admission that failed to respond to high-dose corticosteroids, plasma exchange, intravenous immunoglobulin, and rituximab. Disease cessation and significant recovery was achieved after cyclophosphamide induction. In patients with severe acute immune-mediated LETM who fail to respond to corticosteroids and plasma exchange, cyclophosphamide induction should be considered...
July 20, 2017: Canadian Journal of Neurological Sciences. le Journal Canadien des Sciences Neurologiques
https://www.readbyqxmd.com/read/28724288/proton-based-structural-analysis-of-a-heptahelical-transmembrane-protein-in-lipid-bilayers
#8
Daniela Lalli, Matthew N Idso, Loren B Andreas, Sunyia Hussain, Naomi Baxter, Songi Han, Bradley F Chmelka, Guido Pintacuda
The structures and properties of membrane proteins in lipid bilayers are expected to closely resemble those in native cell-membrane environments, though have been difficult to elucidate. By performing solid-state NMR measurements at very fast (100 kHz) magic-angle spinning rates and at high (23.5 T) magnetic field, severe sensitivity and resolution challenges are overcome, enabling the atomic-level characterization of membrane proteins in lipid environments. This is demonstrated by extensive (1)H-based resonance assignments of the fully protonated heptahelical membrane protein proteorhodopsin, and the efficient identification of numerous (1)H-(1)H dipolar interactions, which provide distance constraints, inter-residue proximities, relative orientations of secondary structural elements, and protein-cofactor interactions in the hydrophobic transmembrane regions...
July 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28722715/erratum-gut-microbial-metabolites-limit-the-frequency-of-autoimmune-t-cells-and-protect-against-type-1-diabetes
#9
Eliana Mariño, James L Richards, Keiran H McLeod, Dragana Stanley, Yu Anne Yap, Jacinta Knight, Craig McKenzie, Jan Kranich, Ana Carolina Oliveira, Fernando J Rossello, Balasubramanian Krishnamurthy, Christian M Nefzger, Laurence Macia, Alison Thorburn, Alan G Baxter, Grant Morahan, Lee H Wong, Jose M Polo, Robert J Moore, Trevor J Lockett, Julie M Clarke, David L Topping, Leonard C Harrison, Charles R Mackay
No abstract text is available yet for this article.
July 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28714713/promoting-transparency-and-reproducibility-in-behavioral-neuroscience-publishing-replications-registered-reports-and-null-results
#10
Mark G Baxter, Rebecca D Burwell
The editors of Behavioral Neuroscience have been discussing several recent developments in the landscape of scientific publishing. The discussion was prompted, in part, by reported issues of reproducibility and concerns about the integrity of the scientific literature. Although enhanced rigor and transparency in science are certainly important, a related issue is that increased competition and focus on novel findings has impeded the extent to which the scientific process is cumulative. We have decided to join the growing number of journals that are adopting new reviewing and publishing practices to address these problems...
August 2017: Behavioral Neuroscience
https://www.readbyqxmd.com/read/28707559/viscoelastic-properties-of-mitral-valve-leaflets-an-analysis-of-regional-variation-and-frequency-dependency
#11
Jonathan Baxter, Keith G Buchan, Daniel M Espino
The aim of this study was to determine the regional variation in viscoelastic properties of mitral valve leaflets over a range of physiological and patho-physiological frequencies. This included comparisons to be made between anterior and posterior leaflets, anterior leaflet clear and rough zones, and radial and circumferential leaflet orientation. Dynamic mechanical analysis was used to determine frequency-dependent viscoelastic properties. The valve leaflets were dissected from eight porcine hearts. The leaflets were loaded under a sinusoidal tensile displacement, with a mean dynamic peak to trough strain of 11%, applied to all leaflet samples at nine different frequencies, ranging from 0...
July 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28701261/five-year-survival-and-causes-of-death-in-patients-on-home-parenteral-nutrition-for-severe-chronic-and-benign-intestinal-failure
#12
Francisca Joly, Janet Baxter, Michael Staun, Darlene G Kelly, Yi Lisa Hwa, Olivier Corcos, Antonella De Francesco, Federica Agostini, Stanislaw Klek, Lidia Santarpia, Franco Contaldo, Cora Jonker, Geert Wanten, Luisa Chicharro, Rosa Burgos, Andre Van Gossum, Cristina Cuerda, Nuria Virgili, Loris Pironi
BACKGROUND & AIM: Home parenteral nutrition (HPN) is the primary treatment for chronic intestinal failure (IF). Intestinal transplantation (ITx) is indicated when there is an increased risk of death due to HPN complications or to the underlying disease. Age, pathophysiologic conditions and underlying disease are known predictors of HPN dependency and overall survival. Although the cause of death on HPN is mostly related to underlying disease in these patients, the relationship between mortality and duration of HPN use remains unclear...
June 19, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28701083/collaborative-development-of-an-educational-resource-on-rehabilitation-for-people-living-with-hiv
#13
Patricia Solomon, Nancy M Salbach, Kelly K O'Brien, Stephanie Nixon, Catherine Worthington, Larry Baxter, Stephen Tattle, Nicole Gervais
OBJECTIVE: The objective of this study is to describe the collaborative development of a rehabilitation guide for people living with human immunodeficiency virus (HIV) which was adapted from an online resource for clinicians. METHODS: We adapted a comprehensive evidence-informed online clinical resource for people living with HIV using a three-phase participatory process. In Phase 1, we interviewed 26 clinicians and 16 people living with HIV to gather recommendations on how to adapt and format the content to benefit people living with HIV...
July 12, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28699624/line-tension-effects-on-the-wetting-of-nanostructures-an-energy-method
#14
Hao-Yuan Guo, Bo Li, Xi-Qiao Feng
The superhydrophobicity and self-cleaning property of micro/nano-structured solid surfaces require a stable Cassie-Baxter (CB) wetting state at the liquid-solid interface. We present an energy method to investigate how the three-phase line tension affects the CB wetting state on nanostructured materials. For some nanostructures, the line tension may engender a distinct energy barrier, which restricts the position of the three-phase contact line and affects the stability of the CB wetting state. We ascertain the upper and lower limits of the critical pressure at the CB-Wenzel transition...
July 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28698696/is-melatonin-of-value-in-cancer-treatment-experience-with-a-case-of-feline-mammary-carcinoma
#15
Beverly Baxter
No abstract text is available yet for this article.
July 2017: Canadian Veterinary Journal. la Revue Vétérinaire Canadienne
https://www.readbyqxmd.com/read/28697682/a-comfort-assessment-of-existing-cervical-orthoses
#16
Joe Langley, Silvia Pancani, Karen Kilner, Heath Reed, Andy Stanton, Nicola Heron, Simon Judge, Avril McCarthy, Susan Baxter, Claudia Mazzà, Christopher J McDermott
PURPOSE: identify location and intensity of discomfort experienced by healthy participants wearing cervical orthoses. METHOD: convenience sample of 34 healthy participants wore Stro II, Philadelphia, Headmaster, and AspenVista(®) cervical orthoses for four-hour periods. Participants reported discomfort level (scale 0-6) and location. RESULTS: participants reported mean discomfort for all orthoses over the four-hour test between 'a little discomfort' and 'very uncomfortable' (mean discomfort score=1...
July 12, 2017: Ergonomics
https://www.readbyqxmd.com/read/28696731/dark-matter-search-results-from-the-pico-60%C3%A2-c_-3-f_-8-bubble-chamber
#17
C Amole, M Ardid, I J Arnquist, D M Asner, D Baxter, E Behnke, P Bhattacharjee, H Borsodi, M Bou-Cabo, P Campion, G Cao, C J Chen, U Chowdhury, K Clark, J I Collar, P S Cooper, M Crisler, G Crowder, C E Dahl, M Das, S Fallows, J Farine, I Felis, R Filgas, F Girard, G Giroux, J Hall, O Harris, E W Hoppe, M Jin, C B Krauss, M Laurin, I Lawson, A Leblanc, I Levine, W H Lippincott, F Mamedov, D Maurya, P Mitra, T Nania, R Neilson, A J Noble, S Olson, A Ortega, A Plante, R Podviyanuk, S Priya, A E Robinson, A Roeder, R Rucinski, O Scallon, S Seth, A Sonnenschein, N Starinski, I Štekl, F Tardif, E Vázquez-Jáuregui, J Wells, U Wichoski, Y Yan, V Zacek, J Zhang
New results are reported from the operation of the PICO-60 dark matter detector, a bubble chamber filled with 52 kg of C_{3}F_{8} located in the SNOLAB underground laboratory. As in previous PICO bubble chambers, PICO-60 C_{3}F_{8} exhibits excellent electron recoil and alpha decay rejection, and the observed multiple-scattering neutron rate indicates a single-scatter neutron background of less than one event per month. A blind analysis of an efficiency-corrected 1167-kg day exposure at a 3.3-keV thermodynamic threshold reveals no single-scattering nuclear recoil candidates, consistent with the predicted background...
June 23, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28692474/molecular-adsorbent-recirculating-system-effectively-replaces-hepatic-function-in-severe-acute-liver-failure
#18
Steven I Hanish, Deborah M Stein, Joseph R Scalea, Eno-Obong Essien, Paul Thurman, William R Hutson, Stephen T Bartlett, Rolf N Barth, Thomas M Scalea
BACKGROUND DATA: Patients with severe acute liver failure (ALF) have extreme physiologic dysfunction and often die if transplantation is not immediately available. Patients may be supported with MARS (Baxter International Inc., Deerfield, IL) until transplantation or spontaneous recovery occurs. We present the largest series in the United States of MARS therapy as temporary hepatic replacement for ALF. METHODS: MARS was used to support patients with severe liver trauma (SLT), in ALF patients as a bridge to transplantation (BTT), and as definitive therapy for toxic ingestion or idiopathic liver failure (DT) in a level 1 trauma center and large transplant center...
July 7, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28691534/relative-survival-and-excess-mortality-following-primary-percutaneous-coronary-intervention-for-st-elevation-myocardial-infarction
#19
Richard A Brogan, Oras Alabas, Sami Almudarra, Marlous Hall, Tatendashe B Dondo, Mamas A Mamas, Paul D Baxter, Phillip D Batin, Nick Curzen, Mark de Belder, Peter F Ludman, Chris P Gale
BACKGROUND: High survival rates are commonly reported following primary percutaneous coronary intervention for ST-elevation myocardial infarction, with most contemporary studies reporting overall survival. AIMS: The aim of this study was to describe survival following primary percutaneous coronary intervention for ST-elevation myocardial infarction corrected for non-cardiovascular deaths by reporting relative survival and investigate clinically significant factors associated with poor long-term outcomes...
July 1, 2017: European Heart Journal. Acute Cardiovascular Care
https://www.readbyqxmd.com/read/28690488/a-novel-partial-duplication-of-zeb2-and-review-of-zeb2-involvement-in-mowat-wilson-syndrome
#20
Adrianne L Baxter, Jay L Vivian, R Tanner Hagelstrom, Waheeda Hossain, Wendy L Golden, E Robert Wassman, Rena J Vanzo, Merlin G Butler
Mowat-Wilson syndrome is a rare genetic condition characterized by intellectual disability, structural anomalies, and dysmorphic features. It is caused by haploinsufficiency of the ZEB2 gene in chromosome 2q22.3. Over 180 distinct mutations in ZEB2 have been reported, including nonsense and missense point mutations, deletions, and large chromosomal rearrangements. We report on a 14-year-old female with a clinical diagnosis of Mowat-Wilson syndrome. Chromosomal microarray identified a novel de novo 69-kb duplication containing exons 1 and 2 of the ZEB2 gene...
June 2017: Molecular Syndromology
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