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https://www.readbyqxmd.com/read/28299958/a-model-of-self-monitoring-blood-glucose-measurement-error
#1
Martina Vettoretti, Andrea Facchinetti, Giovanni Sparacino, Claudio Cobelli
BACKGROUND: A reliable model of the probability density function (PDF) of self-monitoring of blood glucose (SMBG) measurement error would be important for several applications in diabetes, like testing in silico insulin therapies. In the literature, the PDF of SMBG error is usually described by a Gaussian function, whose symmetry and simplicity are unable to properly describe the variability of experimental data. Here, we propose a new methodology to derive more realistic models of SMBG error PDF...
March 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28294687/twenty-two-years-of-u-s-meat-and-poultry-product-recalls-implications-for-food-safety-and-food-waste
#2
Acton Gorton, Matthew J Stasiewicz
The U.S. Department of Agriculture, Food Safety and Inspection Service maintains a recall case archive of meat and poultry product recalls from 1994 to the present. In this study, we collected all recall records from 1994 to 2015 and extracted the recall date, meat or poultry species implicated, reason for recall, recall class, and pounds of product recalled and recovered. Of a total of 1,515 records analyzed, the top three reasons for recall were contamination with Listeria, undeclared allergens, and Shiga toxin-producing Escherichia coli ...
March 15, 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28288078/idiopathic-genu-valgum-and-its-association-with-obesity-in-children-and-adolescents
#3
Janet L Walker, Pooya Hosseinzadeh, Hank White, Kevin Murr, Todd A Milbrandt, Vishwas J Talwalkar, Henry Iwinski, Ryan Muchow
BACKGROUND: Obesity as a cause of lower extremity deformity in children has been well established. This deformity is most often seen as tibia vara, however, at our institution we have observed more obese children and adolescents over age 7 years with excessive or progressive idiopathic genu valgum. Our hypothesis is that children with idiopathic genu valgum have high rates of obesity which impact the severity of their disease. METHODS: Retrospective review of existing data was performed on 66 consecutive children/112 limbs over age 7 years with idiopathic genu valgum, seen from 2010 to 2013...
March 10, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28268479/early-warnings-of-heart-rate-deterioration
#4
Vania G Almeida, Ian T Nabney
Hospitals can experience difficulty in detecting and responding to early signs of patient deterioration leading to late intensive care referrals, excess mortality and morbidity, and increased hospital costs. Our study aims to explore potential indicators of physiological deterioration by the analysis of vital-signs. The dataset used comprises heart rate (HR) measurements from MIMIC II waveform database, taken from six patients admitted to the Intensive Care Unit (ICU) and diagnosed with severe sepsis. Different indicators were considered: 1) generic early warning indicators used in ecosystems analysis (autocorrelation at-1-lag (ACF1), standard deviation (SD), skewness, kurtosis and heteroskedasticity) and 2) entropy analysis (kernel entropy and multi scale entropy)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264243/lumbar-disc-herniation-presented-with-contralateral-symptoms
#5
Pius Kim, Chang Il Ju, Hyeun Sung Kim, Seok Won Kim
OBJECTIVE: This study aimed to unravel the putative mechanism underlying the neurologic deficits contralateral to the side with lumbar disc herniation (LDH) and to elucidate the treatment for this condition. METHODS: From January 2009 to June 2015, 8 patients with LDH with predominantly contralateral neurologic deficits underwent surgical treatment on the side with LDH with or without decompressing the symptomatic side. A retrospective review of charts and radiological records of these 8 patients was performed...
March 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28263629/auditory-spectral-versus-spatial-temporal-order-judgment-threshold-distribution-analysis
#6
Leah Fostick, Harvey Babkoff
Some researchers suggested that one central mechanism is responsible for temporal order judgments (TOJ), within and across sensory channels. This suggestion is supported by findings of similar TOJ thresholds in same modality and cross-modality TOJ tasks. In the present study, we challenge this idea by analyzing and comparing the threshold distributions of the spectral and spatial TOJ tasks. In spectral TOJ, the tones differ in their frequency ("high" and "low") and are delivered either binaurally or monaurally...
March 6, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28258739/analysis-of-ct-features-and-quantitative-texture-analysis-in-patients-with-lung-adenocarcinoma-a-correlation-with-egfr-mutations-and-survival-rates
#7
B Sacconi, M Anzidei, A Leonardi, F Boni, L Saba, R Scipione, M Anile, M Rengo, F Longo, M Bezzi, F Venuta, A Napoli, A Laghi, C Catalano
AIM: To investigate the correlation between conventional computed tomography (CT) features, quantitative texture analysis (QTA), epidermal growth factor receptor (EGFR) mutations, and survival rates in patients with lung adenocarcinoma. MATERIALS AND METHODS: Sixty-eight patients were evaluated for conventional CT features and QTA in this retrospective study. A multiple logistic regression analysis and receiver operating characteristics (ROC) curve analysis versus death and EGFR status was performed for CT features and QTA in order to assess correlation between CT features, QTA, EGFR mutations, and survival rates...
February 28, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28243706/bone-texture-analysis-using-ct-simulation-scans-to-individuate-risk-parameters-for-radiation-induced-insufficiency-fractures
#8
V Nardone, P Tini, S F Carbone, A Grassi, M Biondi, L Sebaste, T Carfagno, E Vanzi, G De Otto, G Battaglia, G Rubino, P Pastina, G Belmonte, L N Mazzoni, F Banci Buonamici, M A Mazzei, L Pirtoli
This study deals with the role of texture analysis as a predictive factor of radiation-induced insufficiency fractures in patients undergoing pelvic radiation. INTRODUCTION: This study aims to assess the texture analysis (TA) of computed tomography (CT) simulation scans as a predictive factor of insufficiency fractures (IFs) in patients with pelvic malignancies undergoing radiation therapy (RT). METHODS: We performed an analysis of patients undergoing pelvic RT from January 2010 to December 2014, 24 of whom had developed pelvic bone IFs...
February 27, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28226652/early-warnings-of-heart-rate-deterioration
#9
Vania G Almeida, Ian T Nabney, Vania G Almeida, Ian T Nabney, Ian T Nabney, Vania G Almeida
Hospitals can experience difficulty in detecting and responding to early signs of patient deterioration leading to late intensive care referrals, excess mortality and morbidity, and increased hospital costs. Our study aims to explore potential indicators of physiological deterioration by the analysis of vital-signs. The dataset used comprises heart rate (HR) measurements from MIMIC II waveform database, taken from six patients admitted to the Intensive Care Unit (ICU) and diagnosed with severe sepsis. Different indicators were considered: 1) generic early warning indicators used in ecosystems analysis (autocorrelation at-1-lag (ACF1), standard deviation (SD), skewness, kurtosis and heteroskedasticity) and 2) entropy analysis (kernel entropy and multi scale entropy)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217355/di-n-butyl-bis-n-2-meth-oxy-eth-yl-n-methyl-dithio-carbamato-%C3%AE%C2%BA-2-s-s-tin-iv-crystal-structure-and-hirshfeld-surface-analysis
#10
Rapidah Mohamad, Normah Awang, Nurul F Kamaludin, Mukesh M Jotani, Edward R T Tiekink
The complete mol-ecule of the title compound, [Sn(C4H9)2(C5H10NOS2)2], is generated by a crystallographic mirror plane, with the Sn(IV) atom and the two inner methyl-ene C atoms of the butyl ligands lying on the mirror plane; statistical disorder is noted in the two terminal ethyl groups, which deviate from mirror symmetry. The di-thio-carbamate ligand coordinates to the metal atom in an asymmetric mode with the resulting C2S4 donor set defining a skew trapezoidal bipyramidal geometry; the n-butyl groups are disposed to lie over the longer Sn-S bonds...
February 1, 2017: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/28213111/childhood-maltreatment-is-associated-with-alteration-in-global-network-fiber-tract-architecture-independent-of-history-of-depression-and-anxiety
#11
Kyoko Ohashi, Carl M Anderson, Elizabeth A Bolger, Alaptagin Khan, Cynthia E McGreenery, Martin H Teicher
Childhood maltreatment is a major risk factor for psychopathology. It is also associated with alterations in the network architecture of the brain, which we hypothesized may play a significant role in the development of psychopathology. In this study, we analyzed the global network architecture of physically healthy unmedicated 18-25 year old subjects (n=262) using diffusion tensor imaging (DTI) MRI and tractography. Anatomical networks were constructed from fiber streams interconnecting 90 cortical or subcortical regions for subjects with no-to-low (n=122) versus moderate-to-high (n=140) exposure to maltreatment...
February 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28208489/prediction-of-the-moments-in-advection-diffusion-lattice-boltzmann-method-ii-attenuation-of-the-boundary-layers-via-double-%C3%AE-bounce-back-flux-scheme
#12
Irina Ginzburg
Impact of the unphysical tangential advective-diffusion constraint of the bounce-back (BB) reflection on the impermeable solid surface is examined for the first four moments of concentration. Despite the number of recent improvements for the Neumann condition in the lattice Boltzmann method-advection-diffusion equation, the BB rule remains the only known local mass-conserving no-flux condition suitable for staircase porous geometry. We examine the closure relation of the BB rule in straight channel and cylindrical capillary analytically, and show that it excites the Knudsen-type boundary layers in the nonequilibrium solution for full-weight equilibrium stencil...
January 2017: Physical Review. E
https://www.readbyqxmd.com/read/28192432/conformational-diversity-analysis-reveals-three-functional-mechanisms-in-proteins
#13
Alexander Miguel Monzon, Diego Javier Zea, María Silvina Fornasari, Tadeo E Saldaño, Sebastian Fernandez-Alberti, Silvio C E Tosatto, Gustavo Parisi
Protein motions are a key feature to understand biological function. Recently, a large-scale analysis of protein conformational diversity showed a positively skewed distribution with a peak at 0.5 Å C-alpha root-mean-square-deviation (RMSD). To understand this distribution in terms of structure-function relationships, we studied a well curated and large dataset of ~5,000 proteins with experimentally determined conformational diversity. We searched for global behaviour patterns studying how structure-based features change among the available conformer population for each protein...
February 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28112048/the-influence-of-change-in-slice-thickness-on-the-accuracy-of-reconstruction-of-cranium-geometry
#14
Grzegorz Budzik, Paweł Turek, Julian Traciak
The article presents a comparative study of change in slice thickness on the accuracy of reconstruction of cranium geometry. Research was performed on 10 different patients. Digital Imaging and Communications in Medicine data were obtained on the Siemens Somatom Sensation Open 40 scanner. At the stage of reconstruction, the same parameters were utilized, while only slice thickness was changed. Modeling with voxel dimensions of 0.4 mm × 0.4 mm × 2.4 mm was chosen as the gold standard over the modeling approach comprising voxel dimensions of 0...
March 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28076867/identifying-host-genetic-variants-associated-with-microbiome-composition-by-testing-multiple-beta-diversity-matrices
#15
Xing Hua, James J Goedert, Maria Teresa Landi, Jianxin Shi
OBJECTIVES: Host genetics have been recently reported to affect human microbiome composition. We previously developed a statistical framework, microbiomeGWAS, to identify host genetic variants associated with microbiome composition by testing a distance matrix. However, statistical power depends on the choice of a microbiome distance matrix. To achieve more robust statistical power, we aim to extend microbiomeGWAS to test the association with many distance matrices, which are defined based on multilevel taxa abundances and phylogenetic information...
2016: Human Heredity
https://www.readbyqxmd.com/read/28057085/3d-analysis-of-apparent-diffusion-coefficient-histograms-in-hepatocellular-carcinoma-correlation-with-histological-grade
#16
Tomohisa Moriya, Kazuhiro Saito, Yu Tajima, Taiyo L Harada, Yoichi Araki, Katsutoshi Sugimoto, Koichi Tokuuye
BACKGROUND: To evaluate the usefulness of differentiation of histological grade in hepatocellular carcinoma (HCC) using three-dimensional (3D) analysis of apparent diffusion coefficient (ADC) histograms retrospectively. METHODS: The subjects consisted of 53 patients with 56 HCCs. The subjects included 12 well-differentiated, 35 moderately differentiated, and nine poorly differentiated HCCs. Diffusion-weighted imaging (b-values of 100 and 800 s/mm(2)) were obtained within 3 months before surgery...
January 5, 2017: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/28048488/su-f-t-602-central-moments-to-analyze-dose-distributions-in-planning-target-volumes
#17
Q Zhang, Y Cao, A Jamshidi, P Vigneri, L Potters, E Klein
PURPOSE: To quantify the dose distribution inside planning target volumes (PTV), the coefficient of variation, skewness (third central moment) and kurtosis (fourth central moment) were used to analyze the dose distributions of PTVs for lung and prostate cases. Those variables can be used to measure the shape of the dose distribution. METHODS: The mean dose, coefficient of variation, skewness, and kurtosis were used to analyze the dose distributions inside PTVs for 24 randomly selected patients...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048091/su-f-r-50-radiation-induced-changes-in-ct-number-histogram-during-chemoradiation-therapy-for-pancreatic-cancer
#18
X Chen, D Schott, Y Song, D Li, W Hall, B Erickson, X Li
PURPOSE: In an effort of early assessment of treatment response, we investigate radiation induced changes in CT number histogram of GTV during the delivery of chemoradiation therapy (CRT) for pancreatic cancer. METHODS: Diagnostic-quality CT data acquired daily during routine CT-guided CRT using a CT-on-rails for 20 pancreatic head cancer patients were analyzed. All patients were treated with a radiation dose of 50.4 in 28 fractions. On each daily CT set, the contours of the pancreatic head and the spinal cord were delineated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047615/su-g-jep2-12-quantification-of-3d-geometric-distortion-for-1-5t-and-3t-mri-scanners-used-for-radiation-therapy
#19
M Stowe, N Gupta, B Raterman, L Lu
PURPOSE: To quantify the magnitude of geometric distortion for MRI scanners and provide recommendations for MRI imaging for radiation therapy METHODS: A novel phantom, QUASAR MRID3D [Modus Medical Devices Inc.], was scanned to evaluate the level of 3D geometric distortion present in five MRI scanners used for radiation therapy in our department. The phantom was scanned using the body coil with 1mm image slice thickness to acquire 3D images of the phantom body. The phantom was aligned to its geometric center for each scan, and the field of view was set to visualize the entire phantom...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047590/su-f-r-02-imaging-genomics-for-predicting-gbm-molecular-subclasses-and-survival
#20
F Mahmoudi, L Poisson, H Bagher-Ebadian, M Nazem-Zadeh, H Soltanian-Zadeh
PURPOSE: Glioblastoma (GBM) is the most common and fatal primary intracranial neoplasm. GBM is categorized into five sub-classes (classical, G-CIMP, mesenchymal, proneural and neural) that can only be determined by an invasive brain biopsy followed by RNA and DNA methylation profiling. The goal of this study is to develop imaging features extracted from conventional MRI scans and an ensemble-classification method as a potential noninvasive method to predict the five molecular sub-classes and 12-month survival status...
June 2016: Medical Physics
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