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quantitative image analysis

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https://www.readbyqxmd.com/read/29166707/-establishment-of-myocardial-targeted-nanoparticles-and-preliminary-evaluation-of-its-effects-on-prevention-and-treatment-of-myocardial-injury
#1
Y Y Liu, C Wang, P F Luo, Z F Xia
Objective: To establish 3-{4-[2-hydroxyl-(1-methylethylamino) propoxy] phenyl} propionic acid cetylesters (PAC) modified nanoparticles, and preliminarily explore its cardiomyocyte-targeting function and protection effects on myocardium. Methods: (1) HL-1 myocardial cells were divided into cyanidin-3 (Cy3) marked non-targeted small interference RNA (Cy3-siNC) group and Cy3 marked small interference RNA designed for the nuclear factor kappa B (NF-κB)-p65 gene (Cy3-si435) group according to the random number table, with 3 wells in each group...
November 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/29166300/effect-of-age-on-high-t1-signal-intensity-of-the-dentate-nucleus-and-globus-pallidus-in-a-large-population-exposed-to-gadodiamide
#2
Carlo Cosimo Quattrocchi, Yuri Errante, Carlo Augusto Mallio, Luca Marinelli, Gianguido LoVullo, Gabriele Giannotti, Sabino Walter Della Sala, Aart J van der Molen, Bruno Beomonte Zobel
OBJECTIVE: The purpose of this study was to assess the effect of age and number of previous injections of gadodiamide on the signal intensity of unenhanced T1-weighted (T1w) images of the dentate nucleus and globus pallidus in a large population. MATERIALS AND METHODS: A large, single-center retrospective population survey was designed and received institutional review board approval. Between January 2014 and December 2014, T1w signal intensity ratios were obtained from a large population of 2500 consecutive enhanced brain magnetic resonance imaging (MRI) scans...
November 21, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/29166246/imaging-features-of-gadoxetic-acid-enhanced-and-diffusion-weighted-mr-imaging-for-identifying-cytokeratin-19-positive-hepatocellular-carcinoma-a-retrospective-observational-study
#3
Seo-Youn Choi, Seong Hyun Kim, Cheol Keun Park, Ji Hye Min, Ji Eun Lee, Yoon-Hyeong Choi, Bo Ra Lee
Purpose To determine the preoperative magnetic resonance (MR) imaging findings potentially most useful for predicting cytokeratin 19 (CK19)-positive hepatocellular carcinoma (HCC) and to evaluate the prognosis after curative resection in patients with a single HCC lesion positive for CK19 compared with patients with HCC who are negative for CK19. Materials and Methods The institutional review board approved this study and waived the requirement for informed consent. Two hundred four patients with CK19-negative HCC and 38 with CK19-positive HCC who underwent curative resection after gadoxetic acid-enhanced and diffusion-weighted MR imaging were retrospectively evaluated in a single institution...
November 21, 2017: Radiology
https://www.readbyqxmd.com/read/29166170/highly-accurate-identification-of-cystic-precursor-lesions-of-pancreatic-cancer-through-targeted-mass-spectrometry-a-phase-iic-diagnostic-study
#4
Karolina S Jabbar, Liisa Arike, Caroline S Verbeke, Riadh Sadik, Gunnar C Hansson
Purpose Pancreatic cystic lesions are common incidental findings on imaging, but up to half may be forerunners of pancreatic cancer. Therefore, accurate differential diagnosis is crucial for correct patient management. Unfortunately, currently available diagnostic methods cannot robustly identify premalignant and malignant pancreatic cystic lesions. Methods Cyst fluid samples obtained by routine endoscopic ultrasound-guided aspiration were used for the analyses. In a cohort of 24 patients, eight biomarker candidates for malignant potential and high-grade dysplasia/cancer were identified by an explorative proteomic approach...
November 22, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/29166135/application-of-diffusion-tensor-imaging-in-quantitatively-monitoring-chronic-constriction-injury-of-rabbit-sciatic-nerves-correlation-with-histological-and-functional-changes
#5
Wenjun Wu, Yanfeng Niu, Xiangquan Kong, Dingxi Liu, Xi Long, Shenglei Shu, Xiaoyun Su, Bing Wang, Xiaoming Liu, Yamei Ma, Lixia Wang
OBJECTIVE: To investigate the potential of diffusion tensor imaging (DTI) in quantitatively monitoring chronic constriction injuries (CCI) of sciatic nerves and to analyze the association of DTI parameters with nerve histology and limb function. METHODS: CCI was created on sciatic nerves in the right hind legs of 20 rabbits with the left as control. DTI parameters -- fractional anisotropy (FA), apparent diffusion coefficient (ADC), axial diffusivity (AD) and radial diffusivity (RD) -- and limb function were longitudinally evaluated...
November 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29165995/magnetic-particle-imaging-for-highly-sensitive-quantitative-and-safe-in-vivo-gut-bleed-detection-in-a-murine-model
#6
Elaine Y Yu, Prashant Chandrasekharan, Ran Berzon, Zhi Wei Tay, Xinyi Y Zhou, Amit P Khandhar, R Matthew Ferguson, Scott J Kemp, Bo Zheng, Patrick W Goodwill, Michael F Wendland, Kannan M Krishnan, Spencer Behr, Jonathan Carter, Steven M Conolly
Gastrointestinal (GI) bleeding causes more than 300,000 hospitalizations per year in the United States. Imaging plays a crucial role in accurately locating the source of the bleed for timely intervention. Magnetic Particle Imaging (MPI) is an emerging clinically translatable imaging modality that images superparamagnetic iron-oxide (SPIO) tracers with extraordinary contrast and sensitivity. This linearly quantitative modality has zero background tissue signal and zero signal depth attenuation. MPI is also safe: there is zero ionizing radiation exposure to the patient and clinically approved tracers can be used with MPI...
November 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/29165992/quantitative-chemical-analysis-at-the-nanoscale-using-the-ptir-technique
#7
Georg Ramer, Vladimir Aksyuk, Andrea Centrone
Photothermal induced resonance (PTIR), also known as AFM-IR, is a scanning probe technique that provides sample composition information with a lateral resolution down to 20 nm. Interest in PTIR stems from its ability to identify unknown samples at the nanoscale thanks, in first approximation, to the direct comparability of PTIR spectra with far-field infrared databases. The development of rapidly tuning quantum cascade lasers has increased the PTIR throughput considerably, making nanoscale hyper-spectral imaging within a reasonable timeframe possible...
November 22, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29165935/peripapillary-perfused-capillary-density-in-exfoliation-syndrome-and-exfoliation-glaucoma-versus-poag-and-healthy-controls-an-octa-study
#8
Yanin Suwan, Lawrence S Geyman, Masoud Aghsaei Fard, Apichat Tantraworasin, Toco Y Chui, Richard B Rosen, Robert Ritch
PURPOSE: To compare the peripapillary perfused capillary density (PCD) among eyes with exfoliation syndrome (XFS), exfoliation glaucoma (XFG), primary open-angle glaucoma (POAG), and controls. DESIGN: Observational, cross-sectional study. METHODS: Optical coherence tomography angiography (OCTA) images (4.5×4.5 mm) of the optic nerve head were obtained using a commercial spectral domain OCTA system (AngioVue Avanti RTVue-XR, OptoVue, Fremont, CA)...
November 22, 2017: Asia-Pacific Journal of Ophthalmology
https://www.readbyqxmd.com/read/29165577/quantitative-mri-brain-in-congenital-adrenal-hyperplasia-in-vivo-assessment-of-the-cognitive-and-structural-impact-of-steroid-hormones
#9
Emma A Webb, Lucy Elliott, Dominic Carlin, Martin Wilson, Kirsty Hall, Jennifer Netherton, Julie Reed, Tim G Barrett, Vijay Salwani, Jon D Clayden, Wiebke Arlt, Nils Krone, Andrew C Peet, Amanda G Wood
Context: Brain white matter hyper-intensities are seen on routine clinical imaging in 46% of adults with congenital adrenal hyperplasia (CAH). The extent and functional relevance of these abnormalities have not been studied using quantitative MRI analysis. Objective: To examine white matter microstructure, neural volumes and CNS metabolites in CAH due to 21-hydroxylase deficiency (21OHD) and to determine whether identified abnormalities are associated with cognition, glucocorticoid and androgen exposure...
November 20, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29165568/second-harmonic-generation-reveals-subtle-fibrosis-differences-in-adult-and-pediatric-nonalcoholic-fatty-liver-disease
#10
Feng Liu, Jing-Min Zhao, Hui-Ying Rao, Wei-Miao Yu, Wei Zhang, Neil D Theise, Aileen Wee, Lai Wei
Objectives: Investigate subtle fibrosis similarities and differences in adult and pediatric nonalcoholic fatty liver disease (NAFLD) using second harmonic generation (SHG). Methods: SHG/two-photon excitation fluorescence imaging quantified 100 collagen parameters and determined qFibrosis values by using the nonalcoholic steatohepatitis (NASH) Clinical Research Network (CRN) scoring system in 62 adult and 36 pediatric NAFLD liver specimens. Results: Six distinct parameters identified differences among the NASH CRN stages with high accuracy (area under the curve, 0835-0...
November 20, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29165397/low-computational-cost-footprint-deformities-diagnosis-sensor-through-angles-dimensions-analysis-and-image-processing-techniques
#11
J Rodolfo Maestre-Rendon, Tomas A Rivera-Roman, Juan M Sierra-Hernandez, Ivan Cruz-Aceves, Luis M Contreras-Medina, Carlos Duarte-Galvan, Arturo A Fernandez-Jaramillo
Manual measurements of foot anthropometry can lead to errors since this task involves the experience of the specialist who performs them, resulting in different subjective measures from the same footprint. Moreover, some of the diagnoses that are given to classify a footprint deformity are based on a qualitative interpretation by the physician; there is no quantitative interpretation of the footprint. The importance of providing a correct and accurate diagnosis lies in the need to ensure that an appropriate treatment is provided for the improvement of the patient without risking his or her health...
November 22, 2017: Sensors
https://www.readbyqxmd.com/read/29164082/acute-septic-arthritis-of-the-knee-caused-by-kingella-kingae-in-a-5-year-old-cameroonian-boy
#12
Nawal El Houmami, Dimitri Ceroni, Karine Codjo Seignon, Jean-Christophe Pons, Cédric Lambert, Guillaume André Durand, Philippe Minodier, Léopold Lamah, Philippe Bidet, Jacques Schrenzel, Didier Raoult, Pierre-Edouard Fournier
Kingella kingae is an important cause of invasive infections in young children from Western countries. Although increasing reports indicate that this organism is the leading agent of bone and joint infections in early childhood, data on K. kingae infections from resource-limited settings are scarce, and none has yet been reported in Africa. We herein report the diagnostic and epidemiological investigations of the first case of K. kingae arthritis identified in a child from sub-Saharan Africa. A 5-year-old Cameroonian boy presented with a sudden painful limp which appeared in the course of a mild rhinopharyngitis...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/29163839/prognostic-value-of-intratumoral-metabolic-heterogeneity-on-f-18-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-in-locally-advanced-cervical-cancer-patients-treated-with-concurrent-chemoradiotherapy
#13
Gun Oh Chong, Won Kee Lee, Shin Young Jeong, Shin-Hyung Park, Yoon Hee Lee, Sang-Woo Lee, Dae Gy Hong, Jae-Chul Kim, Yoon Soon Lee
Objective: To evaluate the prognostic value for predicting tumor recurrence of intratumoral metabolic heterogeneity and traditional quantitative metabolic parameters on pre-treatment F-18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) in patients with locally advanced cervical cancer treated with concurrent chemoradiotherapy (CCRT). Materials and Methods: Ninety-three patients with biopsy-proven cervical cancer and treated with CCRT (FIGO stage IIB-IV) were enrolled in this study...
October 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/29163659/automated-quality-control-of-ultrasound-based-on-in-air-reverberation-patterns
#14
Pepijn van Horssen, Arnold Schilham, Dennis Dickerscheid, Niels van der Werf, Han Keijzers, Ronald van Almere, Joost Kuijer, Rob Peters, Mark Hofman
Ultrasound image degradation originates primarily from transducer defects and potentially undermines reliable image interpretation. Systematic quantitative quality control is often neglected due to the limited resources available for this task. We propose a quantitative quality control based on in-air reverberation images. These images serve as an initial indication of image degradation. They are easily generated for any (curvi-)linear transducer independent of the level of expertise of the operator. Automated analysis is presented to extract quality parameters based on the in-air reverberation pattern...
November 2017: Ultrasound: Journal of the British Medical Ultrasound Society
https://www.readbyqxmd.com/read/29163410/modeling-reveals-the-role-of-aging-and-glucose-uptake-impairment-in-l1a1-listeria-monocytogenes-biofilm-life-cycle
#15
Eva Balsa-Canto, Carlos Vilas, Alejandro López-Núñez, Maruxa Mosquera-Fernández, Romain Briandet, Marta L Cabo, Carlos Vázquez
Listeria monocytogenes is a food-borne pathogen that can persist in food processing plants by forming biofilms on abiotic surfaces. The benefits that bacteria can gain from living in a biofilm, i.e., protection from environmental factors and tolerance to biocides, have been linked to the biofilm structure. Different L. monocytogenes strains build biofilms with diverse structures, and the underlying mechanisms for that diversity are not yet fully known. This work combines quantitative image analysis, cell counts, nutrient uptake data and mathematical modeling to provide a mechanistic insight into the dynamics of the structure of biofilms formed by L...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29163181/shengfu-oil-enhances-the-healing-of-full-thickness-scalded-skin-accompanying-the-differential-regulation-of-%C3%AE-catenin-dlk1-and-cox-2
#16
Man-Tang Chen, Yan-Jing Yang, Yu-Sang Li, Xiao-Jun Li, Wei K Zhang, Jin-Ping Wang, Xu Wang, Gui-Hua Tian, He-Bin Tang
Shengfu oil is a traditional Chinese medicine formula containing 16 ingredients, including Scutellariae radix, Olibanum, and Rehmanniae radix. In this study, we aimed to enhance the wound healing of rabbit full-thickness scalded skin by Shengfu oil and to elucidate its regulatory effects on β-catenin, Dlk1, and COX-2. We found that Shengfu oil exhibited significant anti-inflammatory, analgesic, and antimicrobial activities. The structure of wound tissues in Shengfu oil group was intact, including regenerated cutaneous appendages, indicating better healing capability of Shengfu oil compared to the controls...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29163140/simultaneous-imaging-of-cerebrovascular-structure-and-function-in-hypertensive-rats-using-synchrotron-radiation-angiography
#17
Liping Wang, Zhihao Mu, Xiaojie Lin, Jieli Geng, Ti Qiao Xiao, Zhijun Zhang, Yongting Wang, Yongjing Guan, Guo-Yuan Yang
Hypertension has a profound influence on the structure and function of blood vessels. Cerebral vessels undergo both structural and functional changes in hypertensive animals. However, dynamic changes of cerebrovasculature and the factors involved in this process are largely unknown. In this study, we explored the dynamic changes of vascular structure in hypertensive rats using novel synchrotron radiation angiography. Twenty-four spontaneously hypertensive rats (SHR) and 24 Sprague-Dawley (SD) rats underwent synchrotron radiation (SR) angiography...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29163108/alterations-in-white-matter-integrity-in-young-adults-with-smartphone-dependence
#18
Yuanming Hu, Xiaojing Long, Hanqing Lyu, Yangyang Zhou, Jianxiang Chen
Smartphone dependence (SPD) is increasingly regarded as a psychological problem, however, the underlying neural substrates of SPD is still not clear. High resolution magnetic resonance imaging provides a useful tool to help understand and manage the disorder. In this study, a tract-based spatial statistics (TBSS) analysis on diffusion tensor imaging (DTI) was used to measure white matter integrity in young adults with SPD. A total of 49 subjects were recruited and categorized into SPD and control group based on their clinical behavioral tests...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29162012/meeting-report-tissue-based-image-analysis
#19
Chandra Saravanan, Vanessa Schumacher, Danielle Brown, Robert Dunstan, Jean-Rene Galarneau, Marielle Odin, Sasmita Mishra
Quantitative image analysis (IA) is a rapidly evolving area of digital pathology. Although not a new concept, the quantification of histological features on photomicrographs used to be cumbersome, resource-intensive, and limited to specialists and specialized laboratories. Recent technological advances like highly efficient automated whole slide digitizer (scanner) systems, innovative IA platforms, and the emergence of pathologist-friendly image annotation and analysis systems mean that quantification of features on histological digital images will become increasingly prominent in pathologists' daily professional lives...
October 2017: Toxicologic Pathology
https://www.readbyqxmd.com/read/29161596/an-in-toto-approach-to-dissecting-cellular-interactions-in-complex-tissues
#20
Pavak Kirit Shah, Anthony Santella, Adrian Jacobo, Kimberly Siletti, A J Hudspeth, Zhirong Bao
Single-cell measurements have broadened our understanding of heterogeneity in biology, yet have been limited to mostly observational studies of normal or globally perturbed systems. Typically, perturbations are utilized in an open-ended approach wherein an endpoint is assayed during or after the biological event of interest. Here we describe ShootingStar, a platform for perturbation analysis in vivo, which combines live imaging, real-time image analysis, and automated optical perturbations. ShootingStar builds a quantitative record of the state of the sample being analyzed, which is used to automate the identification of target cells for perturbation, as well as to validate the impacts of the perturbation...
November 20, 2017: Developmental Cell
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