keyword
MENU ▼
Read by QxMD icon Read
search

image extraction

keyword
https://www.readbyqxmd.com/read/29908037/alpha-blockers-as-medical-expulsive-therapy-for-ureteral-stones-a-cochrane-systematic-review
#1
Thijs Campschroer, Xiaoye Zhu, Robin W M Vernooij, M T W Tycho Lock
OBJECTIVES: To assess the effects of alpha-blockers compared to standard therapy or placebo for ureteral stones 1 cm and less confirmed by imaging in adult patients presenting with symptoms of ureteral stone disease. PATIENTS AND METHODS: We performed a systematic search in multiple databases and grey literature with no restrictions on the language of publication or publication status, up until November 2017. We included randomised controlled trials evaluating ureteral stone passage in adult patients, that compared alpha-blockers with standard therapy or placebo...
June 16, 2018: BJU International
https://www.readbyqxmd.com/read/29907288/colorimetric-ionophore-based-coextraction-titrimetry-of-potassium-ions
#2
Kajorngai Thajee, Lu Wang, Kate Grudpan, Eric Bakker
Potassium ion concentration can be successfully determined volumetrically by moving the titration from a homogeneous phase to a two phase solvent system. This is because potassium can be readily complexed in a selective and thermodynamically stable manner by ionophores such as valinomycin. Previous work demonstrated the successful titration of potassium by ion-exchange into an organic phase containing valinomycin, but the sample itself served as titrant, which is not sufficiently practical for routine applications...
October 31, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29907219/effects-of-a%C3%A3-a%C3%A3-and-cilostazol-on-skin-microcirculation-and-viability-of-tram-flaps-in-hamsters
#3
Denise S Coelho da Mota, Fernando L Sicuro, Angela C Resende, Roberto S De Moura, Daniel A Bottino, Eliete Bouskela
BACKGROUND: Tissue necrosis caused by insufficient perfusion is a major complication in flap transfer. This study evaluated whether treatment with cilostazol or hydroalcoholic extract of seeds of Euterpe oleracea Mart. (açaí) protects the transverse rectus abdominis myocutaneous (TRAM) flap against ischemic damage in hamsters. MATERIALS AND METHODS: Fifty-four hamsters were divided into three oral treatment groups: placebo, açaí, or cilostazol. Caudally based, unipedicled TRAM flaps were raised, sutured back, classified into four vascular zones (I-IV), and evaluated for tissue viability, capillary blood flow (CBF), perfused vessel density (PVD), and microvascular flow index (MFI) by orthogonal polarization spectral imaging at three time points: immediately postoperatively (IPO), 24 h postoperatively (24hPO), and 7 d postoperatively (7POD)...
August 2018: Journal of Surgical Research
https://www.readbyqxmd.com/read/29906949/scale-invariant-feature-extraction-of-neural-network-and-renormalization-group-flow
#4
Satoshi Iso, Shotaro Shiba, Sumito Yokoo
Theoretical understanding of how a deep neural network (DNN) extracts features from input images is still unclear, but it is widely believed that the extraction is performed hierarchically through a process of coarse graining. It reminds us of the basic renormalization group (RG) concept in statistical physics. In order to explore possible relations between DNN and RG, we use the restricted Boltzmann machine (RBM) applied to an Ising model and construct a flow of model parameters (in particular, temperature) generated by the RBM...
May 2018: Physical Review. E
https://www.readbyqxmd.com/read/29906773/in-vitro-investigation-of-anti-acne-properties-of-mangifera-indica-l-kernel-extract-and-its-mechanism-of-action-against-propionibacterium-acnes
#5
Worrapan Poomanee, Wantida Chaiyana, Monika Mueller, Helmut Viernstein, Watcharee Khunkitti, Pimporn Leelapornpisid
Propionibacterium acnes has been recognized as a main target for medical treatment of acne since this bacterium promotes acne inflammation by inducing upregulation of pro-inflammatory cytokines production, resulting in an accumulation of neutrophils and oxygen-free radicals produced by neutrophils within acne lesion. The aims of this study were to evaluate the biological activities of Mangifera indica kernel extracts grown in Northern Thailand (Kaew-Moragot cultivar), related to anti-acne properties including antimicrobial effect against acne-inducing bacteria together with the first elucidation of the mechanism of action against Propionibacterium acnes, anti-oxidation, and anti-inflammation...
May 17, 2018: Anaerobe
https://www.readbyqxmd.com/read/29906672/displacement-of-teeth-without-and-with-bonded-fixed-orthodontic-retainers-3d-analysis-using-triangular-target-frames-and-optoelectronic-motion-tracking-device
#6
Firas Chakroun, Vera Colombo, Dave Lie Sam Foek, Luigi Maria Gallo, Albert Feilzer, Mutlu Özcan
PURPOSE: The objective of this study was to evaluate the anterior tooth movement without and with bonded fixed orthodontic retainers under incremental loading conditions. MATERIALS AND METHODS: Six extracted mandibular anterior human teeth were embedded in acrylic resin in True Form I Arch type and 3D reconstruction of Digital Volume Tomography (DVT) images (0.4 mm3 voxels) were obtained. The anatomy of each tooth was segmented and digitally reconstructed using 3D visualization software for medical images (AMIRA, FEI SVG)...
June 6, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29906634/whole-head-quantitative-susceptibility-mapping-using-a-least-norm-direct-dipole-inversion-method
#7
Hongfu Sun, Yuhan Ma, M Ethan MacDonald, G Bruce Pike
A new dipole field inversion method for whole head quantitative susceptibility mapping (QSM) is proposed. Instead of performing background field removal and local field inversion sequentially, the proposed method performs dipole field inversion directly on the total field map in a single step. To aid this under-determined and ill-posed inversion process and obtain robust QSM images, Tikhonov regularization is implemented to seek the local susceptibility solution with the least-norm (LN) using the L-curve criterion...
June 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29906618/treatment-outcomes-of-17-patients-with-atypical-spinal-meningioma-including-4-with-metastases-a-retrospective-observational-study
#8
Sung Hyun Noh, Kyung Hyun Kim, Dong Ah Shin, Jeong Yoon Park, Seong Yi, Sung Uk Kuh, Keung Nyun Kim, Dong Kyu Chin, Keun Su Kim, Do Heum Yoon, Yong Eun Cho
BACKGROUND CONTEXT: Because of the scarcity of atypical spinal meningioma, there is a lack of research on this type of tumor or its associated metastases. PURPOSE: The aim of this study was to investigate the biological behavior of atypical spinal meningioma and identify its prognostic factors by reviewing surgical and clinical outcomes of patients with these tumors. STUDY DESIGN/SETTING: A retrospective chart review was performed. PATIENT SAMPLE: We retrospectively reviewed the data from all patients who underwent spinal cord tumor excision between 1994 and 2017...
June 12, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29905728/high-speed-image-reconstruction-algorithm-for-a-spatially-multiplexed-image-and-application-to-digital-holography
#9
Tatsuki Tahara, Takuya Gotohda, Takanori Akamatsu, Yasuhiko Arai, Tomoyoshi Shimobaba, Tomoyoshi Ito, Takashi Kakue
We propose a high-speed image-reconstruction algorithm for a spatially multiplexed image that is obtained by spatial frequency-division multiplexing. The algorithm utilizes smoothing and does not require any Fourier transform (FT) or iterative procedure to extract the desired information selectively from a single image. Numerical and experimental results show its validity and color holographic imaging ability. Calculation time of the proposed is less than a tenth of that of the FT method when using a central processing unit and an image sensor with four megapixels...
June 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29905680/end-to-end-deep-neural-network-for-optical-inversion-in-quantitative-photoacoustic-imaging
#10
Chuangjian Cai, Kexin Deng, Cheng Ma, Jianwen Luo
An end-to-end deep neural network, ResU-net, is developed for quantitative photoacoustic imaging. A residual learning framework is used to facilitate optimization and to gain better accuracy from considerably increased network depth. The contracting and expanding paths enable ResU-net to extract comprehensive context information from multispectral initial pressure images and, subsequently, to infer a quantitative image of chromophore concentration or oxygen saturation (sO2 ). According to our numerical experiments, the estimations of sO2 and indocyanine green concentration are accurate and robust against variations in both optical property and object geometry...
June 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29905649/multivariate-pattern-classification-of-brain-white-matter-connectivity-predicts-classic-trigeminal-neuralgia
#11
Jidan Zhong, David Qixiang Chen, Peter S P Hung, Dave J Hayes, Kevin E Liang, Karen D Davis, Mojgan Hodaie
Trigeminal neuralgia (TN) is a severe form of chronic facial neuropathic pain. Increasing interest in the neuroimaging of pain has highlighted changes in the root entry zone in TN, but also group level CNS grey and white matter abnormalities. Group differences in neuroimaging data are frequently evaluated with univariate statistics, however this approach is limited because it is based on single, or clusters of, voxels. In contrast, multivariate pattern analyses consider all the model's neuroanatomical features to capture a specific distributed spatial pattern...
June 13, 2018: Pain
https://www.readbyqxmd.com/read/29905355/-radiomics-big-data-instead-of-biopsies-in-the-future
#12
Kathrin Scheckenbach
Precision medicine is increasingly pushed forward, also with respect to upcoming new targeted therapies. Individual characterization of diseases on the basis of biomarkers is a prerequisite for this development. So far, biomarkers are characterized clinically, histologically or on a molecular level. The implementation of broad screening methods ("Omics") and the analysis of big data - in addition to single markers - allow to define biomarker signatures. Next to "Genomics", "Proteomics", and "Metabolicis", "Radiomics" gained increasing interest during the last years...
March 2018: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/29905095/systematic-review-of-calyceal-diverticulum
#13
Hiroki Ito, Omar Aboumarzouk, Faris Abushamma, Francis Keeley
PURPOSE: We performed a systematic review of the literature regarding the diagnosis and treatment of calyceal diverticulum (CD). METHODS: The search strategy was conducted according to the Cochrane reviews guidelines for systematic reviews and Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) checklist. RESULTS: In total 1189 titles and abstracts were reviewed, of which 101 were selected for manuscript evaluation...
June 15, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29905087/effects-of-tunable-keratin-hydrogel-erosion-on-rhbmp-2-release-bioactivity-and-bone-induction
#14
David Josh Cohen, Sharon L Hyzy, Salma Haque, Lucas C Olson, Barbara Boyan, Justin M Saul, Zvi Schwartz
Keratin proteins derived from human hair are known to contain a large number of cysteine residues. In hydrogels composed of oxidatively extracted keratin (keratose), sulfonic acid on the cysteine residues prevents disulfide crosslinking. Reductively extracted keratin (kerateine) has thiol groups on cysteine residues that can form disulfide crosslinks. The rates of keratin hydrogel erosion and, in some cases, drug release can be tuned by manipulating disulfide crosslinking levels via the keratose:kerateine (KOS:KTN) ratio...
June 15, 2018: Tissue Engineering. Part A
https://www.readbyqxmd.com/read/29904817/optimization-of-temporal-sampling-for-18-f-choline-uptake-quantification-in-prostate-cancer-assessment
#15
Xavier Palard-Novello, Anne-Lise Blin, Florence Le Jeune, Etienne Garin, Pierre-Yves Salaün, Anne Devillers, Giulio Gambarota, Solène Querellou, Patrick Bourguet, Hervé Saint-Jalmes
BACKGROUND: Suboptimal temporal sampling of time-activity curves (TAC) from dynamic 18 F-fluoromethylcholine (FCH) PET images may introduce bias in quantification of FCH uptake in prostate cancer assessment. We sought to define an optimal temporal sampling protocol for dynamic FCH PET imaging. Seven different time samplings were tested: 5 × 60″, 10 × 30″, 15 × 15″-1 × 75″, 6 × 10″-8 × 30″, 12 × 5″-8 × 30″; 10 × 5″-4 × 10″-3 × 20″-5 × 30″, and 8 × 3″-8 × 12″-6 × 30″...
June 15, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29904787/estimating-mechanical-properties-of-cloth-from-videos-using-dense-motion-trajectories-human-psychophysics-and-machine-learning
#16
Wenyan Bi, Peiran Jin, Hendrikje Nienborg, Bei Xiao
Humans can visually estimate the mechanical properties of deformable objects (e.g., cloth stiffness). While much of the recent work on material perception has focused on static image cues (e.g., textures and shape), little is known about whether humans can integrate information over time to make a judgment. Here we investigated the effect of spatiotemporal information across multiple frames (multiframe motion) on estimating the bending stiffness of cloth. Using high-fidelity cloth animations, we first examined how the perceived bending stiffness changed as a function of the physical bending stiffness defined in the simulation model...
May 1, 2018: Journal of Vision
https://www.readbyqxmd.com/read/29904747/a-rapid-computational-approach-for-assessing-interfraction-esophageal-motion-for-use-in-stereotactic-body-radiation-therapy-planning
#17
Michael L Cardenas, Thomas R Mazur, Christina I Tsien, Olga L Green
Purpose: We present a rapid computational method for quantifying interfraction motion of the esophagus in patients undergoing stereotactic body radiation therapy on a magnetic resonance (MR) guided radiation therapy system. Methods and materials: Patients who underwent stereotactic body radiation therapy had simulation computed tomography (CT) and on-treatment MR scans performed. The esophagus was contoured on each scan. CT contours were transferred to MR volumes via rigid registration...
April 2018: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29904135/a-deep-learning-framework-to-discern-and-count-microscopic-nematode-eggs
#18
Adedotun Akintayo, Gregory L Tylka, Asheesh K Singh, Baskar Ganapathysubramanian, Arti Singh, Soumik Sarkar
In order to identify and control the menace of destructive pests via microscopic image-based identification state-of-the art deep learning architecture is demonstrated on the parasitic worm, the soybean cyst nematode (SCN), Heterodera glycines. Soybean yield loss is negatively correlated with the density of SCN eggs that are present in the soil. While there has been progress in automating extraction of egg-filled cysts and eggs from soil samples counting SCN eggs obtained from soil samples using computer vision techniques has proven to be an extremely difficult challenge...
June 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29903498/betti-number-ratios-as-quantitative-indices-for-bone-morphometry-in-three-dimensions
#19
Takashi Teramoto, Takeshi Kamiya, Taira Sakurai, Fuminori Kanaya
BACKGROUND AND OBJECTIVE: Computational homology is an emerging mathematical tool for characterizing shapes of data. In this work, we present a methodology using computational homology for obtaining quantitative measurements of the connectivity in bone morphometry. We introduce the Betti number ratios as novel morphological descriptor for the classification of bone fine structures in three dimensions. METHODS: A total of 51 Japanese white rabbits were used to investigate the connectivity of bone trabeculae after the administration of alendronate in a tendon graft model in rabbits...
August 2018: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/29903494/sparse-deformation-prediction-using-markove-decision-processes-mdp-for-non-rigid-registration-of-mr-image
#20
Tianyu Fu, Qin Li, Jianjun Zhu, Danni Ai, Yong Huang, Hong Song, Yurong Jiang, Yongtian Wang, Jian Yang
BACKGROUND AND OBJECTIVE: A framework of sparse deformation prediction using Markove Decision Processes is proposed for achieving a rapid and accurate registration by providing a suitable initial deformation. METHODS: In the proposed framework, the tree is built based on the training set for each patch from the template image. The template patch is considered as the root. The node is the patch group in which multiple similar patches are extracted around a key point on the training image...
August 2018: Computer Methods and Programs in Biomedicine
keyword
keyword
66258
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"