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Texture analysis

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https://www.readbyqxmd.com/read/27913337/melanoma-classification-on-dermoscopy-images-using-a-neural-network-ensemble-model
#1
Feng-Ying Xie, Haidi Fan, Li Yang, Zhi-Guo Jiang, Ru-Song Meng, Alan Bovik
We develop a novel method for classifying melanocytic tumors as benign or malignant by the analysis of digital dermoscopy images. The algorithm follows three steps: first, lesions are extracted using a self-generating neural network (SGNN); second, features descriptive of tumor color, texture and border are extracted; and third, lesion objects are classified using a classifier based on a neural network ensemble model. In clinical situations, lesions occur that are too large to be entirely contained within the dermoscopy image...
December 1, 2016: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/27911268/texture-analysis-of-intermediate-advanced-hepatocellular-carcinoma-prognosis-and-patients-selection-of-transcatheter-arterial-chemoembolization-and-sorafenib
#2
Sirui Fu, Shuting Chen, Changhong Liang, Zaiyi Liu, Yanjie Zhu, Yong Li, Ligong Lu
Transcatheter arterial chemoembolization (TACE) and sorafenib combination treatment for unselected hepatocellular carcinoma (HCC) is controversial. We explored the potential of texture analysis for appropriate patient selection. There were 261 HCCs included (TACE group: n = 197; TACE plus sorafenib (TACE+Sorafenib) group n = 64). We applied a Gabor filter and wavelet transform with 3 band-width responses (filter 0, 1.0, and 1.5) to portal-phase computed tomography (CT) images of the TACE group. Twenty-one textural parameters per filter were extracted from the region of interests delineated around tumor outline...
November 29, 2016: Oncotarget
https://www.readbyqxmd.com/read/27908164/comparison-of-low-contrast-detectability-between-two-ct-reconstruction-algorithms-using-voxel-based-3d-printed-textured-phantoms
#3
Justin Solomon, Alexandre Ba, François Bochud, Ehsan Samei
PURPOSE: To use novel voxel-based 3D printed textured phantoms in order to compare low-contrast detectability between two reconstruction algorithms, FBP (filtered-backprojection) and SAFIRE (sinogram affirmed iterative reconstruction) and determine what impact background texture (i.e., anatomical noise) has on estimating the dose reduction potential of SAFIRE. METHODS: Liver volumes were segmented from 23 abdominal CT cases. The volumes were characterized in terms of texture features from gray-level co-occurrence and run-length matrices...
December 2016: Medical Physics
https://www.readbyqxmd.com/read/27908020/tug-of-war-lacunarity-a-novel-approach-for-estimating-lacunarity
#4
Martin A Reiss, Birgit Lemmerer, Arnold Hanslmeier, Helmut Ahammer
Modern instrumentation provides us with massive repositories of digital images that will likely only increase in the future. Therefore, it has become increasingly important to automatize the analysis of digital images, e.g., with methods from pattern recognition. These methods aim to quantify the visual appearance of captured textures with quantitative measures. As such, lacunarity is a useful multi-scale measure of texture's heterogeneity but demands high computational efforts. Here we investigate a novel approach based on the tug-of-war algorithm, which estimates lacunarity in a single pass over the image...
November 2016: Chaos
https://www.readbyqxmd.com/read/27906315/effect-of-non-conformal-gold-deposition-on-sers-related-plasmonic-effects
#5
Swe Zin Oo, Martin D B Charlton
Recently, a comprehensive three dimensional computational model based on rigorous coupled wave analysis (RCWA) has been developed to investigate the properties of surface plasmons resident on metal coated arrays of inverted pyramidal pits used for SERS sensing applications in the form of 'klarite'. This simulation tool allows the identification of a variety of dispersive features including propagating and localized surface plasmons as well as simple diffraction relating to the influence of geometrical features...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27902757/evidence-of-facilitation-cascade-processes-as-drivers-of-successional-patterns-of-ecosystem-engineers-at-the-upper-altitudinal-limit-of-the-dry-puna
#6
Luca Malatesta, Federico Maria Tardella, Karina Piermarteri, Andrea Catorci
Facilitation processes constitute basic elements of vegetation dynamics in harsh systems. Recent studies in tropical alpine environments demonstrated how pioneer plant species defined as "ecosystem engineers" are capable of enhancing landscape-level richness by adding new species to the community through the modification of microhabitats, and also provided hints about the alternation of different ecosystem engineers over time. Nevertheless, most of the existing works analysed different ecosystem engineers separately, without considering the interaction of different ecosystem engineers...
2016: PloS One
https://www.readbyqxmd.com/read/27898842/inferring-phenotypic-causal-structures-among-meat-quality-traits-and-the-application-of-a-structural-equation-model-in-japanese-black-cattle
#7
K Inoue, B D Valente, N Shoji, T Honda, K Oyama, G J M Rosa
Meat quality is one of the most important traits determining carcass price in the Japanese beef market. Optimized breeding goals and management practices for the improvement of meat quality traits requires knowledge regarding any potential functional relationships between them. In this context, the objective of this research was to infer phenotypic causal networks involving beef marbling score (BMS), beef color score (BCL), firmness of beef (FIR), texture of beef (TEX), beef fat color score (BFS), and the ratio of MUFA to SFA (MUS) from 11,855 Japanese Black cattle...
October 2016: Journal of Animal Science
https://www.readbyqxmd.com/read/27898201/diffusion-weighted-imaging-of-the-abdomen-impact-of-b-values-on-texture-analysis-features
#8
Anton S Becker, Matthias W Wagner, Moritz C Wurnig, Andreas Boss
The purpose of this work was to systematically assess the impact of the b-value on texture analysis in MR diffusion-weighted imaging (DWI) of the abdomen. In eight healthy male volunteers, echo-planar DWI sequences at 16 b-values ranging between 0 and 1000 s/mm(2) were acquired at 3 T. Three different apparent diffusion coefficient (ADC) maps were computed (0, 750/100, 390, 750 s/mm(2) /all b-values). Texture analysis of rectangular regions of interest in the liver, kidney, spleen, pancreas, paraspinal muscle and subcutaneous fat was performed on DW images and the ADC maps, applying 19 features computed from the histogram, grey-level co-occurrence matrix (GLCM) and grey-level run-length matrix (GLRLM)...
November 29, 2016: NMR in Biomedicine
https://www.readbyqxmd.com/read/27895962/texture-analysis-of-supraspinatus-ultrasound-image-for-computer-aided-diagnostic-system
#9
Byung Eun Park, Won Seuk Jang, Sun Kook Yoo
OBJECTIVES: In this paper, we proposed an algorithm for recognizing a rotator cuff supraspinatus tendon tear using a texture analysis based on a histogram, gray level co-occurrence matrix (GLCM), and gray level run length matrix (GLRLM). METHODS: First, we applied a total of 57 features (5 first order descriptors, 40 GLCM features, and 12 GLRLM features) to each rotator cuff region of interest. Our results show that first order statistics (mean, skewness, entropy, energy, smoothness), GLCM (correlation, contrast, energy, entropy, difference entropy, homogeneity, maximum probability, sum average, sum entropy), and GLRLM features are helpful to distinguish a normal supraspinatus tendon and an abnormal supraspinatus tendon...
October 2016: Healthcare Informatics Research
https://www.readbyqxmd.com/read/27894600/reply-letter-to-texture-analysis-of-parotid-gland-as-a-predictive-factor-of-radiation-induced-xerostomia-a-subset-analysis
#10
Lisanne V van Dijk, Johannes A Langendijk, Nanna M Sijtsema, Roel J H M Steenbakkers
No abstract text is available yet for this article.
November 25, 2016: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/27893380/area-determination-of-diabetic-foot-ulcer-images-using-a-cascaded-two-stage-svm-based-classification
#11
Lei Wang, Peder Pedersen, Emmanuel Agu, Diane Strong, Bengisu Tulu
It is standard practice for clinicians and nurses to primarily assess patients' wounds via visual examination. This subjective method can be inaccurate in wound assessment and also represents a significant clinical workload. Hence, computer-based systems, especially implemented on mobile devices, can provide automatic, quantitative wound assessment and can thus be valuable for accurately monitoring wound healing status. Out of all wound assessment parameters, the measurement of the wound area is the most suitable for automated analysis...
November 23, 2016: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/27889496/how-parents-describe-picky-eating-and-its-impact-on-family-meals-a-qualitative-analysis
#12
Amanda C Trofholz, Anna K Schulte, Jerica M Berge
Children are frequently described as being picky eaters. However, this term has been inconsistently defined in prior research. There is limited qualitative research data investigating how parent's define picky eating, how they respond to it, or how they see picky eating impacting their child's dietary intake or the family meal. For this study, parents (n = 88) of siblings (ages 2-18 years old) were interviewed in their homes. The semi-structured interviews focused on parent feeding practices and child eating behaviors...
November 23, 2016: Appetite
https://www.readbyqxmd.com/read/27887837/evaluating-the-influence-of-geo-environmental-factors-on-gully-erosion-in-a-semi-arid-region-of-iran-an-integrated-framework
#13
Omid Rahmati, Naser Tahmasebipour, Ali Haghizadeh, Hamid Reza Pourghasemi, Bakhtiar Feizizadeh
Despite the importance of soil erosion in sustainable development goals in arid and semi-arid areas, the study of the geo-environmental conditions and factors influencing gully erosion occurrence is rarely undertaken. As effort to this challenge, the main objective of this study is to apply an integrated approach of Geographic Object-Based Image Analysis (GEOBIA) together with high-spatial resolution imagery (SPOT-5) for detecting gully erosion features at the Kashkan-Poldokhtar watershed, Iran. We also aimed to apply a Conditional Probability (CP) model for establishing the spatial relationship between gullies and the Geo-Environmental Factors (GEFs)...
November 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27887658/parameter-set-for-computer-assisted-texture-analysis-of-fetal-brain
#14
Hugues Gentillon, Ludomir Stefańczyk, Michał Strzelecki, Maria Respondek-Liberska
BACKGROUND: Magnetic resonance data were collected from a diverse population of gravid women to objectively compare the quality of 1.5-tesla (1.5 T) versus 3-T magnetic resonance imaging of the developing human brain. MaZda and B11 computational-visual cognition tools were used to process 2D images. We proposed a wavelet-based parameter and two novel histogram-based parameters for Fisher texture analysis in three-dimensional space. RESULTS: Wavenhl, focus index, and dispersion index revealed better quality for 3 T...
November 25, 2016: BMC Research Notes
https://www.readbyqxmd.com/read/27886380/acceptability-and-preference-drivers-of-freshly-roasted-peanuts
#15
Shangci Wang, Koushik Adhikari, Yen-Con Hung
The objectives of this study were to determine and compare the sensory perceptions and aroma volatiles of 6 freshly roasted peanut samples and to explore the drivers of consumer acceptability. Normal-oleic Georgia 06G kernels (06G), high-oleic Georgia 13M kernels (13M), Georgia runner (mixed) in-shell (InR) & kernels (R), and Virginia (mixed) in-shell (InVA) & kernels (VA) were roasted to medium doneness for consumers, descriptive, and gas chromatography-mass spectroscopy (GC-MS) tests. For Virginia variety, InVA was preferred over VA...
November 25, 2016: Journal of Food Science
https://www.readbyqxmd.com/read/27885836/texture-analysis-of-medical-images-for-radiotherapy-applications
#16
Elisa Scalco, Giovanna Rizzo
The high-throughput extraction of quantitative information from medical images, known as radiomics, has grown in interest due to the current necessity of quantitatively characterise tumour heterogeneity. In this context, texture analysis, consisting of a variety of mathematical techniques able to describe the grey-level patterns of an image, plays an important role in assessing the spatial organisation of different tissues and organs. For these reasons, the potentiality of texture analysis in the context of radiotherapy has been widely investigated in several studies, especially for the prediction of the treatment response of tumour and normal tissues...
November 25, 2016: British Journal of Radiology
https://www.readbyqxmd.com/read/27883158/fast-or-slow-foods-describing-natural-variations-in-oral-processing-characteristics-across-a-wide-range-of-asian-foods
#17
C G Forde, C Leong, E Chia-Ming, K McCrickerd
The structural properties of foods have a functional role to play in oral processing behaviours and sensory perception, and also impact on meal size and the experience of fullness. This study adopted a new approach by using behavioural coding analysis of eating behaviours to explore how a range of food textures manifest as the microstructural properties of eating and expectations of fullness. A selection of 47 Asian foods were served in fixed quantities to a panel of participants (N = 12) and their eating behaviours were captured via web-camera recordings...
November 24, 2016: Food & Function
https://www.readbyqxmd.com/read/27877885/investigation-of-microstructure-in-additive-manufactured-inconel-625-by-spatially-resolved-neutron-transmission-spectroscopy
#18
Anton S Tremsin, Yan Gao, Laura C Dial, Francesco Grazzi, Takenao Shinohara
Non-destructive testing techniques based on neutron imaging and diffraction can provide information on the internal structure of relatively thick metal samples (up to several cm), which are opaque to other conventional non-destructive methods. Spatially resolved neutron transmission spectroscopy is an extension of traditional neutron radiography, where multiple images are acquired simultaneously, each corresponding to a narrow range of energy. The analysis of transmission spectra enables studies of bulk microstructures at the spatial resolution comparable to the detector pixel...
2016: Science and Technology of Advanced Materials
https://www.readbyqxmd.com/read/27875657/characterization-of-macrophage-activating-polysaccharide-isolated-from-fermented-brown-rice
#19
Dae-Young Lee, Myoung-Sook Shin, Kwang-Soon Shin
Brown rice has nutritional benefits due to its abundant nutrients and high dietary fiber content. However, it is often consumed in a fermented form for improved chewy texture and digestibility. In this study, a polysaccharide, FBR-4a, was isolated from fermented brown rice and its chemical composition was analyzed. In addition, its immune-stimulating activity was determined using RAW264.7 cells. FBR-4a is a carbohydrate and consists of nine types of monosaccharides, including galactose, arabinose, rhamnose, mannose, fucose, xylose, glucose, galacturonic acid, and glucuronic acid...
November 22, 2016: Journal of Medicinal Food
https://www.readbyqxmd.com/read/27873148/local-texture-descriptors-for-the-assessment-of-differences-in-diffusion-magnetic-resonance-imaging-of-the-brain
#20
Felix Sebastian Leo Thomsen, Claudio Augusto Delrieux, Rodrigo de Luis-García
PURPOSE: Descriptors extracted from magnetic resonance imaging (MRI) of the brain can be employed to locate and characterize a wide range of pathologies. Scalar measures are typically derived within a single-voxel unit, but neighborhood-based texture measures can also be applied. In this work, we propose a new set of descriptors to compute local texture characteristics from scalar measures of diffusion tensor imaging (DTI), such as mean and radial diffusivity, and fractional anisotropy...
November 21, 2016: International Journal of Computer Assisted Radiology and Surgery
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