keyword
MENU ▼
Read by QxMD icon Read
search

Image interpretation

keyword
https://www.readbyqxmd.com/read/29457651/progressive-recruitment-of-contralesional-cortico-reticulospinal-pathways-drives-motor-impairment-post-stroke
#1
Jacob G McPherson, Albert Chen, Michael D Ellis, Jun Yao, C J Heckman, Julius P A Dewald
KEY POINTS: Activation of the shoulder abductor muscles in the arm opposite a unilateral brain injury causes involuntary increases in elbow, wrist and finger flexion in the same arm, a phenomenon referred to as the flexion synergy. It has been proposed that flexion synergy expression is related to reduced output from ipsilesional motor cortex and corticospinal pathways. In this human subjects study, we provide evidence that the magnitude of flexion synergy expression is instead related to a progressive, task-dependent recruitment of contralesional cortex...
February 19, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29457314/latent-source-mining-in-fmri-via-restricted-boltzmann-machine
#2
Xintao Hu, Heng Huang, Bo Peng, Junwei Han, Nian Liu, Jinglei Lv, Lei Guo, Christine Guo, Tianming Liu
Blind source separation (BSS) is commonly used in functional magnetic resonance imaging (fMRI) data analysis. Recently, BSS models based on restricted Boltzmann machine (RBM), one of the building blocks of deep learning models, have been shown to improve brain network identification compared to conventional single matrix factorization models such as independent component analysis (ICA). These models, however, trained RBM on fMRI volumes, and are hence challenged by model complexity and limited training set...
February 18, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29456411/clinical-utility-of-hepatitis-b-surface-antigen-kinetics-in-treatment-na%C3%A3-ve-chronic-hepatitis-b-patients-during-long-term-entecavir-therapy
#3
Tien-Ching Lin, Yen-Cheng Chiu, Hung-Chih Chiu, Wen-Chun Liu, Pin-Nan Cheng, Chiung-Yu Chen, Ting-Tsung Chang, I-Chin Wu
AIM: To investigate the utility of hepatitis B surface antigen (HBsAg) kinetics in chronic hepatitis B patients during long-term entecavir treatment. METHODS: This retrospective study included treatment-naïve chronic hepatitis B patients who received at least 2 years of consecutive entecavir treatment. Patients were followed up at three to six month intervals with liver biochemistry, hepatitis B virus DNA, and abdominal sonography. In hepatitis B e antigen (HBeAg)-positive patients, HBeAg levels were assessed every three to six month until results became negative...
February 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29456256/clustering-the-orion-b-giant-molecular-cloud-based-on-its-molecular-emission
#4
Emeric Bron, Chloé Daudon, Jérôme Pety, François Levrier, Maryvonne Gerin, Pierre Gratier, Jan H Orkisz, Viviana Guzman, Sébastien Bardeau, Javier R Goicoechea, Harvey Liszt, Karin Öberg, Nicolas Peretto, Albrecht Sievers, Pascal Tremblin
Context: Previous attempts at segmenting molecular line maps of molecular clouds have focused on using position-position-velocity data cubes of a single molecular line to separate the spatial components of the cloud. In contrast, wide field spectral imaging over a large spectral bandwidth in the (sub)mm domain now allows one to combine multiple molecular tracers to understand the different physical and chemical phases that constitute giant molecular clouds (GMCs). Aims: We aim at using multiple tracers (sensitive to different physical processes and conditions) to segment a molecular cloud into physically/chemically similar regions (rather than spatially connected components), thus disentangling the different physical/chemical phases present in the cloud...
February 2018: Astronomy and Astrophysics
https://www.readbyqxmd.com/read/29454006/predicting-cognitive-decline-with-deep-learning-of-brain-metabolism-and-amyloid-imaging
#5
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/29453455/temporal-structure-in-spiking-patterns-of-ganglion-cells-defines-perceptual-thresholds-in-rodents-with-subretinal-prosthesis
#6
Elton Ho, Henri Lorach, Georges Goetz, Florian Laszlo, Xin Lei, Theodore Kamins, Jean-Charles Mariani, Alexander Sher, Daniel Palanker
Subretinal prostheses are designed to restore sight in patients blinded by retinal degeneration using electrical stimulation of the inner retinal neurons. To relate retinal output to perception, we studied behavioral thresholds in blind rats with photovoltaic subretinal prostheses stimulated by full-field pulsed illumination at 20 Hz, and measured retinal ganglion cell (RGC) responses to similar stimuli ex-vivo. Behaviorally, rats exhibited startling response to changes in brightness, with an average contrast threshold of 12%, which could not be explained by changes in the average RGC spiking rate...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29453439/working-memory-and-brain-tissue-microstructure-white-matter-tract-integrity-based-on-multi-shell-diffusion-mri
#7
Sohae Chung, Els Fieremans, Nuri E Kucukboyaci, Xiuyuan Wang, Charles J Morton, Dmitry S Novikov, Joseph F Rath, Yvonne W Lui
Working memory is a complex cognitive process at the intersection of sensory processing, learning, and short-term memory and also has a general executive attention component. Impaired working memory is associated with a range of neurological and psychiatric disorders, but very little is known about how working memory relates to underlying white matter (WM) microstructure. In this study, we investigate the association between WM microstructure and performance on working memory tasks in healthy adults (right-handed, native English speakers)...
February 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29452345/daily-biopsy-diagnosis-in-surgical-pathology-concordance-between-light-microscopy-and-whole-slide-imaging-in-real-life-conditions
#8
Irène Villa, Marie-Christine Mathieu, Jacques Bosq, Anne Auperin, Jean-François Pomerol, Magali Lacroix-Triki, Jean-Yves Scoazec, Peggy Dartigues
Objectives: The current challenge for the various digital whole-slide imaging (WSI) systems is to be definitively validated for diagnostic purposes. We designed a concordance study between glass slide and digital slide diagnosis in real-life conditions, coupled with an ergonomic study. Methods: Three senior pathologists evaluated, first in glass slides and then in digital slides, 119 biopsy cases, including 749 slides, with 332 H&E saffron stains and 417 additional techniques, mainly immunohistochemistry...
February 14, 2018: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/29452312/effects-of-higher-versus-lower-threat-contexts-on-pain-related-visual-attention-biases-an-eye-tracking-study-of-chronic-pain
#9
Todd Jackson, Lin Su, Yang Wang
In this research, we examined effects of higher versus lower threat contexts on attention biases in more and less pain-fearful chronic pain subgroups via eye-tracking methodology. Within a mixed chronic pain sample (69 women, 29 men), biases in orienting and maintenance of visual attention were assessed during the standardized image pair presentation phase (2000ms) of a modified visual dot probe task featuring painful-neutral (P-N) image pairs (lower threat context) and a parallel task in which these P-N pairs cued potential pain (higher threat context)...
February 13, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29451872/differences-in-neural-responses-to-ipsilateral-stimuli-in-wide-view-fields-between-face-and-house-selective-areas
#10
Bin Wang, Ting Li, Yan Niu, Jie Xiang, Junjie Cheng, Bo Liu, Hui Zhang, Tianyi Yan, Susumu Kanazawa, Jinglong Wu
Category-selective brain areas exhibit varying levels of neural activity to ipsilaterally presented stimuli. However, in face- and house-selective areas, the neural responses evoked by ipsilateral stimuli in the peripheral visual field remain unclear. In this study, we displayed face and house images using a wide-view visual presentation system while performing functional magnetic resonance imaging (fMRI). The face-selective areas (fusiform face area (FFA) and occipital face area (OFA)) exhibited intense neural responses to ipsilaterally presented images, whereas the house-selective areas (parahippocampal place area (PPA) and transverse occipital sulcus (TOS)) exhibited substantially smaller and even negative neural responses to the ipsilaterally presented images...
2018: PloS One
https://www.readbyqxmd.com/read/29451848/mr-imaging-of-atraumatic-muscle-disorders
#11
Edward Smitaman, Dyan V Flores, Catalina Mejía Gómez, Mini N Pathria
Atraumatic disorders of skeletal muscles include congenital variants; inherited myopathies; acquired inflammatory, infectious, or ischemic disorders; neoplastic diseases; and conditions leading to muscle atrophy. These have overlapping appearances at magnetic resonance (MR) imaging and are challenging for the radiologist to differentiate. The authors organize muscle disorders into four MR imaging patterns: (a) abnormal anatomy with normal signal intensity, (b) edema/inflammation, (c) mass, and (d) atrophy, highlighting each of their key clinical and imaging findings...
February 16, 2018: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29451491/the-relationship-between-spatial-configuration-and-functional-connectivity-of-brain-regions
#12
Janine Diane Bijsterbosch, Mark W Woolrich, Matthew F Glasser, Emma C Robinson, Christian F Beckmann, David C Van Essen, Samuel J Harrison, Stephen M Smith
Brain connectivity is often considered in terms of the communication between functionally distinct brain regions. Many studies have investigated the extent to which patterns of coupling strength between multiple neural populations relates to behaviour. For example, studies have used 'functional connectivity fingerprints' to characterise individuals' brain activity. Here, we investigate the extent to which the exact spatial arrangement of cortical regions interacts with measures of brain connectivity. We find that the shape and exact location of brain regions interact strongly with the modelling of brain connectivity, and present evidence that the spatial arrangement of functional regions is strongly predictive of non-imaging measures of behaviour and lifestyle...
February 16, 2018: ELife
https://www.readbyqxmd.com/read/29450710/indicators-for-imaging-in-periorbital-cellulitis-secondary-to-rhinosinusitis
#13
Basel Jabarin, Ephraim Eviatar, Ofer Israel, Tal Marom, Haim Gavriel
PURPOSE: Our objective was to identify the clinical indicators for subperiosteal orbital abscess (SPOA) among patients who present with periorbital cellulitis secondary to rhinosinusitis, and to evaluate the need for performing a computerized tomography (CT) scan. METHODS: A retrospective cohort study of all patients admitted to our tertiary care emergency department between 2006 and 2014 was conducted. Included were healthy patients with acute periorbital cellulitis secondary to rhinosinusitis...
February 15, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29450106/optical-system-design-for-noncontact-normal-incidence-thz-imaging-of-in-vivo-human-cornea
#14
Shijun Sung, Shahab Dabironezare, Nuria Llombart, Skyler Selvin, Neha Bajwa, Somporn Chantra, Bryan Nowroozi, James Garritano, Jacob Goell, Alex Li, Sophie X Deng, Elliott Brown, Warren S Grundfest, Zachary D Taylor
Reflection mode Terahertz (THz) imaging of corneal tissue water content (CTWC) is a proposed method for early, accurate detection and study of corneal diseases. Despite promising results from ex vivo and in vivo cornea studies, interpretation of the reflectivity data is confounded by the contact between corneal tissue and dielectric windows used to flatten the imaging field. Herein, we present an optical design for non-contact THz imaging of cornea. A beam scanning methodology performs angular, normal incidence sweeps of a focused beam over the corneal surface while keeping the source, detector, and patient stationary...
January 2018: IEEE Transactions on Terahertz Science and Technology
https://www.readbyqxmd.com/read/29449297/delivering-safe-and-effective-test-result-communication-management-and-follow-up-a-mixed-methods-study-protocol
#15
Maria R Dahm, Andrew Georgiou, Johanna I Westbrook, David Greenfield, Andrea R Horvath, Denis Wakefield, Ling Li, Ken Hillman, Patrick Bolton, Anthony Brown, Graham Jones, Robert Herkes, Robert Lindeman, Michael Legg, Meredith Makeham, Daniel Moses, Dauda Badmus, Craig Campbell, Rae-Anne Hardie, Julie Li, Euan McCaughey, Gorkem Sezgin, Judith Thomas, Nasir Wabe
INTRODUCTION: The failure to follow-up pathology and medical imaging test results poses patient-safety risks which threaten the effectiveness, quality and safety of patient care. The objective of this project is to: (1) improve the effectiveness and safety of test-result management through the establishment of clear governance processes of communication, responsibility and accountability; (2) harness health information technology (IT) to inform and monitor test-result management; (3) enhance the contribution of consumers to the establishment of safe and effective test-result management systems...
February 15, 2018: BMJ Open
https://www.readbyqxmd.com/read/29448733/quantitative-image-analysis-of-carbon-nanostructure-of-particles-produced-from-combustion-process
#16
Seuk-Cheun Choi, Seul-Hyun Park
In the present study, the soot particles produced from diffusion flames burning biodiesel fuel were thermophoretically sampled and the carbon nanostructure of soot particles were imaged using a high resolution transmission electron microscopy (HRTEM). The HRTEM images of soot particles were then quantitatively analyzed using a digital image processing algorithm developed and implemented as part of this work. The HRTEM interpretations with an aid of image processing support feasibility of use of the developed image processing technique for carbon nanostructure quantification...
March 1, 2018: Journal of Nanoscience and Nanotechnology
https://www.readbyqxmd.com/read/29447888/pathogenesis-of-chronic-rhinosinusitis-in-patients-affected-by-%C3%AE-thalassemia-major-and-sickle-cell-anaemia-post-allogenic-bone-marrow-transplant
#17
F Martino, R Di Mauro, K Paciaroni, J Gaziev, C Alfieri, L Greco, R Floris, S Di Girolamo, M Di Girolamo
OBJECTIVES: Sickle cell anemia (SCA) and β -thalassemia major are well-recognized beta-globin gene disorders of red blood cells associated to mortality and morbidity included bone morbidities due to ineffective erythropoiesis and bone marrow expansion, which affect every part of the skeleton. While there are an abundance of described disease manifestations of the head and neck, the manner of paranasal sinuses involvement and its relations to β-thalassemia and SCA process was not studied yet...
March 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29446681/coronary-ct-angiography-use-in-patients-with-chest-pain-presenting-to-emergency-departments
#18
David C Levin, Laurence Parker, Ethan J Halpern, Vijay M Rao
OBJECTIVE: Previously published reports have shown that coronary CT angiography (CCTA) is a more efficient method of diagnosis than myocardial perfusion imaging (MPI) and stress echocardiography for patients presenting to emergency departments (EDs) with acute chest pain. In light of this evidence, the objective of this study was to examine recent trends in the use of these techniques in EDs. MATERIALS AND METHODS: The nationwide Medicare Part B databases for 2006-2015 were the data source...
February 15, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29446670/diagnostic-performance-of-margin-features-in-thyroid-nodules-in-prediction-of-malignancy
#19
Sean M Siebert, Adam J Gomez, Tie Liang, Ali M Tahvildari, Terry S Desser, R Brooke Jeffrey, Aya Kamaya
OBJECTIVE: The purpose of this study was to evaluate thyroid nodule margins for specific morphologic features and determine the diagnostic performance of these features in differentiating papillary carcinoma from benign thyroid nodules. MATERIALS AND METHODS: Nodules measuring 1-3 cm in largest diameter that had been evaluated with high-resolution ultrasound (12-18 MHz) and ultrasound-guided biopsy with definitive pathologic diagnosis were analyzed. Three blinded board-certified readers evaluated high-resolution images of each nodule for jagged edges, lobulated borders, and curved borders along their margins...
February 15, 2018: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29446121/atrophy-of-hip-abductor-muscles-is-related-to-clinical-severity-in-a-hip-osteoarthritis-population
#20
Anita Zacharias, Rodney A Green, Adam Semciw, Daniel J English, Theo Kapakoulakis, Tania Pizzari
INTRODUCTION: Osteoarthritis mainly affects weight-bearing joints such as the hip and knee and is the most common form of arthritis. Greater muscle atrophy with fatty infiltration of gluteal muscles and decreased hip abduction strength has previously been identified with increasing severity of radiological hip OA. However, it is well documented that radiographic findings of OA do not always correlate with clinical severity. The aim of this secondary analysis was to examine whether atrophy and strength of gluteus maximus (GMax), medius (GMed), minimus (GMin), and tensor fascia lata (TFL) is associated with the clinical severity of OA...
February 15, 2018: Clinical Anatomy
keyword
keyword
60151
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"