keyword
MENU ▼
Read by QxMD icon Read
search

image extraction

keyword
https://www.readbyqxmd.com/read/29457661/analysis-of-13-c-and-14-c-labeling-in-pyruvate-and-lactate-in-tumor-and-blood-of-lymphoma-bearing-mice-injected-with-13-c-and-14-c-labeled-pyruvate
#1
E M Serrao, M I Kettunen, T B Rodrigues, D Y Lewis, F A Gallagher, D E Hu, K M Brindle
Measurements of hyperpolarized13 C label exchange between injected [1-13 C]pyruvate and the endogenous tumor lactate pool can give an apparent first-order rate constant for the exchange. The determination of the isotope flux, however, requires an estimate of the labeled pyruvate concentration in the tumor. This was achieved here by measurement of the tumor uptake of [1-14 C]pyruvate, which showed that <2% of the injected pyruvate reached the tumor site. Multiplication of this estimated labeled pyruvate concentration in the tumor with the apparent first-order rate constant for hyperpolarized13 C label exchange gave an isotope flux that showed good agreement with a flux determined directly by the injection of non-polarized [3-13 C]pyruvate, rapid excision of the tumor after 30 s and measurement of13 C-labeled lactate concentrations in tumor extracts...
February 19, 2018: NMR in Biomedicine
https://www.readbyqxmd.com/read/29457229/radiomics-analysis-of-pulmonary-nodules-in-low-dose-ct-for-early-detection-of-lung-cancer
#2
Wookjin Choi, Jung Hun Oh, Sadegh Riyahi, Chia-Ju Liu, Feng Jiang, Wengen Chen, Charles White, Andreas Rimner, James G Mechalakos, Joseph O Deasy, Wei Lu
PURPOSE: To develop a radiomics prediction model to improve pulmonary nodule (PN) classification in low-dose CT. To compare the model with the American College of Radiology (ACR) Lung CT Screening Reporting and Data System (Lung-RADS) for early detection of lung cancer. METHODS: We examined a set of 72 PNs (31 benign and 41 malignant) from the Lung Image Database Consortium image collection (LIDC-IDRI). 103 CT radiomic features were extracted from each PN. Before the model building process, distinctive features were identified using a hierarchical clustering method...
February 19, 2018: Medical Physics
https://www.readbyqxmd.com/read/29456966/metabolic-profile-of-oral-squamous-carcinoma-cell-lines-relies-on-a-higher-demand-of-lipid-metabolism-in-metastatic-cells
#3
Ana Carolina B Sant'Anna-Silva, Gilson C Santos, Samir P Costa Campos, André Marco Oliveira Gomes, Juan Alberto Pérez-Valencia, Franklin David Rumjanek
Tumor cells are subjected to a broad range of selective pressures. As a result of the imposed stress, subpopulations of surviving cells exhibit individual biochemical phenotypes that reflect metabolic reprograming. The present work aimed at investigating metabolic parameters of cells displaying increasing degrees of metastatic potential. The metabolites present in cell extracts fraction of tongue fibroblasts and of cell lines derived from human tongue squamous cell carcinoma lineages displaying increasing metastatic potential (SCC9 ZsG, LN1 and LN2) were analyzed by1 H NMR (nuclear magnetic resonance) spectroscopy...
2018: Frontiers in Oncology
https://www.readbyqxmd.com/read/29456485/effect-of-spatial-smoothing-on-task-fmri-ica-and-functional-connectivity
#4
Zikuan Chen, Vince Calhoun
Spatial smoothing is a widely used preprocessing step in functional magnetic resonance imaging (fMRI) data analysis. In this work, we report on the spatial smoothing effect on task-evoked fMRI brain functional mapping and functional connectivity. Initially, we decomposed the task fMRI data into a collection of components or networks by independent component analysis (ICA). The designed task paradigm helps identify task-modulated ICA components (highly correlated with the task stimuli). For the ICA-extracted primary task component, we then measured the task activation volume at the task response foci...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29455135/distinguishing-two-phenotypes-of-blooms-using-the-normalised-difference-peak-valley-index-ndpi-and-cyano-chlorophyta-index-cci
#5
Botian Zhou, Mingsheng Shang, Guoyin Wang, Sheng Zhang, Li Feng, Xiangnan Liu, Ling Wu, Kun Shan
Harmful algal blooms are now widely recognised as a severe threat to freshwater ecosystems, particularly in semi-fluvial environments created by river damming. Given the high spatial and temporal variability of cyanobacterial blooms, remote sensing is more suitable than conventional field surveys in monitoring blooms. However, the majority of existing algorithms cannot distinguish cyanobacterial blooms from eukaryotic algal blooms by extracting spectral features in the remote-sensing reflectance (Rrs ). In this study, in situ Rrs spectra of cyanobacterial and green algal blooms in Lakes Gaoyang, Hanfeng and Changshou of the Three Gorges Reservoir (TGR) in China were recorded...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29455080/optimized-multi-level-elongated-quinary-patterns-for-the-assessment-of-thyroid-nodules-in-ultrasound-images
#6
U Raghavendra, Anjan Gudigar, M Maithri, Arkadiusz Gertych, Kristen M Meiburger, Chai Hong Yeong, Chakri Madla, Pailin Kongmebhol, Filippo Molinari, Kwan Hoong Ng, U Rajendra Acharya
Ultrasound imaging is one of the most common visualizing tools used by radiologists to identify the location of thyroid nodules. However, visual assessment of nodules is difficult and often affected by inter- and intra-observer variabilities. Thus, a computer-aided diagnosis (CAD) system can be helpful to cross-verify the severity of nodules. This paper proposes a new CAD system to characterize thyroid nodules using optimized multi-level elongated quinary patterns. In this study, higher order spectral (HOS) entropy features extracted from these patterns appropriately distinguished benign and malignant nodules under particle swarm optimization (PSO) and support vector machine (SVM) frameworks...
February 7, 2018: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29455026/an-approach-for-cell-viability-online-detection-based-on-the-characteristics-of-lensfree-cell-diffraction-fingerprint
#7
Guoxiao Li, Rongbiao Zhang, Ning Yang, Changsheng Yin, Mingji Wei, Yecheng Zhang, Jian Sun
To overcome the drawbacks such as low automation and high cost, an approach for cell viability online detection is proposed, based on the extracted lensfree cell diffraction fingerprint characteristics. The cell fingerprints are acquired by a constructed large field-of-view (FOV) diffraction imaging platform without any lenses. The approach realizes distinguishing live and dead cells online and calculating cell viability index based on the number of live cells. With theoretical analysis and simulation, diffraction fingerprints of cells with different morphology are simulated and two characteristics are discovered to be able to reflect cell viability status effectively...
February 7, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29454895/ensemble-coding-of-face-identity-is-present-but-weaker-in-congenital-prosopagnosia
#8
Matthew Robson, Romina Palermo, Linda Jeffery, Markus F Neumann
Individuals with congenital prosopagnosia (CP) are impaired at identifying individual faces but do not appear to show impairments in extracting the average identity from a group of faces (known as ensemble coding). However, possible deficits in ensemble coding in a previous study (CPs n=4) may have been masked because CPs relied on pictorial (image) cues rather than identity cues. Here we asked whether a larger sample of CPs (n=11) would show intact ensemble coding of identity when availability of image cues was minimised...
February 15, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29454860/velocity-landscape-correlation-resolves-multiple-flowing-protein-populations-from-fluorescence-image-time-series
#9
Elvis Pandžić, Asmahan Abu-Arish, Renee W Whan, John W Hanrahan, Paul W Wiseman
Molecular, vesicular and organellar flows are of fundamental importance for the delivery of nutrients and essential components used in cellular functions such as motility and division. With recent advances in fluorescence/super-resolution microscopy modalities we can resolve the movements of these objects at higher spatio-temporal resolutions and with better sensitivity. Previously, spatio-temporal image correlation spectroscopy has been applied to map molecular flows by correlation analysis of fluorescence fluctuations in image series...
February 15, 2018: Methods: a Companion to Methods in Enzymology
https://www.readbyqxmd.com/read/29454098/quantitative-imaging-features-and-postoperative-hepatic-insufficiency-a-multi-institutional-expanded-cohort
#10
Linda M Pak, Jayasree Chakraborty, Mithat Gonen, William C Chapman, Richard Kg Do, Bas Groot Koerkamp, Kees Verhoef, Ser Yee Lee, Marco Massani, Eric P van der Stok, Amber L Simpson
BACKGROUND: Post-hepatectomy liver insufficiency (PHLI) is a significant cause of morbidity and mortality after liver resection. Quantitative imaging analysis using CT scans measures variations in pixel intensity related to perfusion. A preliminary study demonstrated a correlation between quantitative imaging features of the future liver remnant (FLR) parenchyma from preoperative CT scans and PHLI. The objective of the present study was to explore the potential application of quantitative imaging analysis in PHLI in an expanded, multi-institutional cohort...
February 14, 2018: Journal of the American College of Surgeons
https://www.readbyqxmd.com/read/29454006/predicting-cognitive-decline-with-deep-learning-of-brain-metabolism-and-amyloid-imaging
#11
Hongyoon Choi, Kyong Hwan Jin
For effective treatment of Alzheimer's disease (AD), it is important to identify subjects who are most likely to exhibit rapid cognitive decline. We aimed to develop an automatic image interpretation system based on a deep convolutional neural network (CNN) which can accurately predict future cognitive decline in mild cognitive impairment (MCI) patients using flurodeoxyglucose and florbetapir positron emission tomography (PET). PET images of 139 patients with AD, 171 patients with MCI and 182 normal subjects obtained from Alzheimer's Disease Neuroimaging Initiative database were used...
February 14, 2018: Behavioural Brain Research
https://www.readbyqxmd.com/read/29453611/comparative-study-of-phototoxicity-of-protoporphyrin-ix-synthetic-and-extracted-from-ssp-rattus-novergicus-albinus-rats-toward-murine-melanoma-cells
#12
E R Reis, L P Ferreira, E M D Nicola, I Borissevitch
Protoporphyrin IX (PpIX) is a precursor of heme synthesis and is known to be an active photosensitizer and precursor of photosensitizers applied in photodynamic therapy (PDT) and photodynamic diagnostics (PDD). On irradiation with visible light, PpIX undergoes phototransformation, producing photoproducts which may also be phototoxic and increase its efficacy. The mechanism of PpIX phototransformation depends on environmental characteristics and can be different in vitro and in vivo. In this paper, we present a comparative study of the photoactivity of synthetic PpIX and PpIX extracted from the Harderian gland of ssp Rattus novergicus albinus rats, along with their photoproducts toward murine B16F-10 melanoma cells...
February 16, 2018: European Biophysics Journal: EBJ
https://www.readbyqxmd.com/read/29450704/gulf-arabic-nouns-and-verbs-a-standardized-set-of-319-object-pictures-and-141-action-pictures-with-predictors-of-naming-latencies
#13
Tariq Khwaileh, Eiman Mustafawi, Ruth Herbert, David Howard
Standardized pictorial stimuli and predictors of successful picture naming are not readily available for Gulf Arabic. On the basis of data obtained from Qatari Arabic, a variety of Gulf Arabic, the present study provides norms for a set of 319 object pictures and a set of 141 action pictures. Norms were collected from healthy speakers, using a picture-naming paradigm and rating tasks. Norms for naming latencies, name agreement, visual complexity, image agreement, imageability, age of acquisition, and familiarity were established...
February 15, 2018: Behavior Research Methods
https://www.readbyqxmd.com/read/29449872/citizen-crowds-and-experts-observer-variability-in-image-based-plant-phenotyping
#14
M Valerio Giuffrida, Feng Chen, Hanno Scharr, Sotirios A Tsaftaris
Background: Image-based plant phenotyping has become a powerful tool in unravelling genotype-environment interactions. The utilization of image analysis and machine learning have become paramount in extracting data stemming from phenotyping experiments. Yet we rely on observer (a human expert) input to perform the phenotyping process. We assume such input to be a 'gold-standard' and use it to evaluate software and algorithms and to train learning-based algorithms. However, we should consider whether any variability among experienced and non-experienced (including plain citizens) observers exists...
2018: Plant Methods
https://www.readbyqxmd.com/read/29449277/modeling-early-postnatal-brain-growth-and-development-with-ct-changes-in-the-brain-radiodensity-histogram-from-birth-to-2-years
#15
K A Cauley, Y Hu, J Och, P J Yorks, S W Fielden
BACKGROUND AND PURPOSE: The majority of brain growth and development occur in the first 2 years of life. This study investigated these changes by analysis of the brain radiodensity histogram of head CT scans from the clinical population, 0-2 years of age. MATERIALS AND METHODS: One hundred twenty consecutive head CTs with normal findings meeting the inclusion criteria from children from birth to 2 years were retrospectively identified from 3 different CT scan platforms...
February 15, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29449187/cortical-atrophy-patterns-in-early-parkinson-s-disease-patients-using-hierarchical-cluster-analysis
#16
Carme Uribe, Barbara Segura, Hugo Cesar Baggio, Alexandra Abos, Anna Isabel Garcia-Diaz, Anna Campabadal, Maria Jose Marti, Francesc Valldeoriola, Yaroslau Compta, Eduard Tolosa, Carme Junque
INTRODUCTION: Cortical brain atrophy detectable with MRI in non-demented advanced Parkinson's disease (PD) is well characterized, but its presence in early disease stages is still under debate. We aimed to investigate cortical atrophy patterns in a large sample of early untreated PD patients using a hypothesis-free data-driven approach. METHODS: Seventy-seven de novo PD patients and 50 controls from the Parkinson's Progression Marker Initiative database with T1-weighted images in a 3-tesla Siemens scanner were included in this study...
February 8, 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29449144/a-dynamic-graph-cuts-method-with-integrated-multiple-feature-maps-for-segmenting-kidneys-in-2d-ultrasound-images
#17
Qiang Zheng, Steven Warner, Gregory Tasian, Yong Fan
RATIONALE AND OBJECTIVES: Automatic segmentation of kidneys in ultrasound (US) images remains a challenging task because of high speckle noise, low contrast, and large appearance variations of kidneys in US images. Because texture features may improve the US image segmentation performance, we propose a novel graph cuts method to segment kidney in US images by integrating image intensity information and texture feature maps. MATERIALS AND METHODS: We develop a new graph cuts-based method to segment kidney US images by integrating original image intensity information and texture feature maps extracted using Gabor filters...
February 12, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29448877/a-new-methodology-for-the-measurement-of-the-root-canal-curvature-and-its-3d-modification-after-instrumentation
#18
Asterios Christodoulou, Georgios Mikrogeorgis, Triantafillia Vouzara, Konstantinos Papachristou, Christos Angelopoulos, Nikolaos Nikolaidis, Ioannis Pitas, Kleoniki Lyroudia
OBJECTIVE: In this study, the three-dimensional (3D) modification of root canal curvature was measured, after the application of Reciproc instrumentation technique, by using cone beam computed tomography (CBCT) imaging and a special algorithm developed for the 3D measurement of the curvature of the root canal. MATERIALS AND METHODS: Thirty extracted upper molars were selected. Digital radiographs for each tooth were taken. Root curvature was measured by using Schneider method and they were divided into three groups, each one consisting of 10 roots, according to their curvature: Group 1 (0°-20°), Group 2 (21°-40°), Group 3 (41°-60°)...
February 15, 2018: Acta Odontologica Scandinavica
https://www.readbyqxmd.com/read/29448076/single-multi-echo-gre-acquisition-with-short-and-long-echo-spacing-for-simultaneous-quantitative-mapping-of-fat-fraction-b0-inhomogeneity-and-susceptibility
#19
Junmin Liu, Spencer Christiansen, Maria Drangova
Multi-echo gradient echo (mGRE) sequences have been widely adapted in clinical and scientific practice for different purposes to their capability of performing Dixon MRI, generating multi-contrast images and extracting multi-parametric maps. This work aims to extend mGRE-based techniques for imaging whole head, where further technical developments are required due to the co-existence of fat and large B0 inhomogeneity in regions such as the skull base and neck. Specifically, bipolar mGRE data were acquired with a single sequence that contains both a short echo-spacing (ΔTE) echo train to capture water-fat and B0 phase shifts (for proton density fat-fraction (FF) and B0 mapping) and a longer ΔTE echo train (and long echo times) to capture subtle susceptibility variations and R2* information...
February 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29446758/localized-thin-section-ct-with-radiomics-feature-extraction-and-machine-learning-to-classify-early-detected-pulmonary-nodules-from-lung-cancer-screening
#20
Shu-Ju Tu, Chih-Wei Wang, Kuang-Tse Pan, Yi-Cheng Wu, Chen-Te Wu
Lung cancer screening aims to detect small pulmonary nodules and decrease the mortality rate. However, studies from large-scale clinical trials of lung cancer screening showed false-positive rate is high and positive predictive value is low. To address these problems, it is highly needed to have a technical approach for accurate malignancy differentiation among these early-detected nodules. We studied the clinical feasibility of an additional protocol of localized thin-section CT for further assessment on these recalled patients from lung cancer screening tests...
February 15, 2018: Physics in Medicine and Biology
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"