Article
Engineering, Biomedical
Florian Vixege, Alain Berod, Yunyun Sun, Simon Mendez, Olivier Bernard, Nicolas Ducros, Pierre-Yves Courand, Franck Nicoud, Damien Garcia
Summary: The iVFM technique, improved with physical constraints, accurately measures blood flow velocity in the heart and shows promising potential in assessing diastolic function in clinical settings.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Physiology
Sarah Frank, Junsung Lee, Jonas Lantz, Tino Ebbers, Shawn C. Shadden
Summary: Recent studies have found correlations between kinetic energy and viscous dissipation rate in the left ventricle with heart health. While 4D-flow imaging or computational fluid dynamics can provide rich data, they are difficult to acquire clinically. Color Doppler echocardiography, on the other hand, is more commonly used clinically but has limitations in measuring blood flow velocity components.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Thermodynamics
Ahmed G. Almetwally, Hadi Jabbari
Summary: By utilizing 3D printed rock samples in experiments, the study reduced geometric uncertainties and accurately described pore network structures. This method showed potential in research on oil recovery.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Biology
Mohammadbagher Sharifkazemi, Mohammadali Nazarinia, Alireza Arjangzade, Mohamad Goldust, Zahra Hooshanginezhad
Summary: Systemic Sclerosis (SSc) is a chronic connective tissue disorder with cardiac involvement being a predictor of poor prognosis. This study evaluated the mechanical performance of all cardiac chambers in SSc patients using two-dimensional speckle tracking echocardiography (2D-STE) and compared it with normal individuals. The results showed that 2D-STE can diagnose impaired chamber mechanics and function in subclinical stages.
Article
Computer Science, Artificial Intelligence
Ilija Domislovic, Donik Vrsnak, Marko Subasic, Sven Loncaric
Summary: In this paper, a new large-scale publicly available color constancy dataset called Shadows & Lumination dataset is introduced. The dataset consists of 2500 minimally processed images from various indoor, outdoor, and night-time scenes. Unlike other datasets, it includes real-world images with two illuminants for multi-illuminant estimation, along with binary segmentation masks dividing the image into regions illuminated by each illuminant. The paper also benchmarks illumination estimation methods and image segmentation methods using the dataset.
EXPERT SYSTEMS WITH APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Yuki Ito, Chinthaka Premachandra, Sagara Sumathipala, H. Waruna H. Premachandra, B. S. Sudantha
Summary: This research introduces a system for enabling independent walking in individuals with visual impairment by recognizing tactile paving and warning about potential dangers. A new camera-based method was developed to automatically detect tactile paving, achieving high detection rates under various conditions.
Article
Multidisciplinary Sciences
Jon-Emile S. Kenny, Stanley O. Gibbs, Delaney Johnston, Lisa M. Hofer, Emily Rae, Geoffrey Clarke, Joseph K. Eibl, Bhanu Nalla, Rony Atoui
Summary: A preload challenge (PC) is a clinical maneuver that aims to assess cardiac function by increasing cardiac filling and measuring changes in cardiac output. The steepness of the relationship between cardiac preload and stroke volume (SV) can vary in different disease states, and accurately determining preload and output is crucial for guiding fluid resuscitation. This study protocol aims to describe a method using a wireless wearable ultrasound device to track surrogates of cardiac preload and output during a validated preload challenge.
JOVE-JOURNAL OF VISUALIZED EXPERIMENTS
(2023)
Article
Thermodynamics
Yue Jin, Koroush Shirvan
Summary: In this study, the behavior of two-phase flow interface during quench transients is visualized and analyzed using an image processing framework. The temporal variation of the interfacial wave frequency approaching quench is investigated in detail. Detailed phase velocity and temperature profiles are obtained through theoretical analysis based on high-resolution data for the liquid-vapor interface.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Acoustics
Jonathan Poree, Guillaume Goudot, Olivier Pedreira, Emeline Laborie, Lina Khider, Tristan Mirault, Emmanuel Messas, Pierre Julia, Jean-Marc Alsac, Mickael Tanter, Mathieu Pernot
Summary: Doppler ultrasound is the primary method for analyzing blood flow dynamics in clinical practice. The recent development of ultrafast parallel systems allows for simultaneous evaluation of different types of Doppler, but at the expense of signal-to-noise ratio (SNR).
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2021)
Article
Computer Science, Information Systems
Zhongjian Xu, Muhammad Ahsan Latif, Syed Shaham Madni, Ammar Rafiq, Iqbal Alam, Muhammad Asif Habib
Summary: This research aims to provide a simple image processing technique for detecting and distinguishing agricultural goods in drone-based agrarian imagery. By using fuzzy reasoning-based tactics combined with RGB and HSV color spaces, the method successfully detects and distinguishes agricultural objects such as white cotton bolls from the rest of the image using cotton crop images as experimental data.
Article
Automation & Control Systems
Hongyuan Zhu, Yi Cheng, Xi Peng, Joey Tianyi Zhou, Zhao Kang, Shijian Lu, Zhiwen Fang, Liyuan Li, Joo-Hwee Lim
Summary: This article introduces a novel generative adversarial network for single-image dehazing, which consists of a compositional generator and deeply supervised discriminator, achieving end-to-end dehazing process and remarkable performance in recovering clean images. Extensive experiments demonstrate that the proposed method significantly outperforms existing methods.
IEEE TRANSACTIONS ON CYBERNETICS
(2021)
Article
Acoustics
Yunyun Sun, Florian Vixege, Khuram Faraz, Simon Mendez, Franck Nicoud, Damien Garcia, Olivier Bernard
Summary: In this article, a numerical framework for generating clinical-like color Doppler imaging (CDI) is presented. Synthetic blood vector fields and realistic clutter artifacts are simulated for evaluating and improving the quality of Doppler imaging techniques.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Agriculture, Multidisciplinary
Gafur Gozukara, Alfred E. Hartemink, Yakun Zhang
Summary: This study explored the effect of different illumination levels on the prediction accuracy of soil organic carbon (SOC) using smartphone-based digital images. Lower illumination levels improved the prediction accuracy of SOC content, with the random forest model achieving relatively high accuracy (r2 = 0.42 to 0.70) under 300 lx illumination level. The a*, R, and H color parameters were the best variables for predicting SOC in the 300 lx dataset.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2023)
Article
Acoustics
Minako Katayama, Naomi M. Gades, Vijay P. Singh, Katrina L. Devick, David Zarbatany, Veronica V. Vaitkus, David L. Belohlavek, F. David Fortuin, Marek Belohlavek
Summary: In this study, percutaneous transendocardial injections using linoleic acid were evaluated in an animal model to assess efficacy. The use of an acoustically active injection catheter showed promising results in delivering the substance to the myocardium, but further technical improvements are needed to minimize systemic distribution of the agent.
JOURNAL OF ULTRASOUND IN MEDICINE
(2022)
Article
Computer Science, Artificial Intelligence
Xuan Dong, Chang Liu, Xiaoyan Hu, Kang Xu, Weixin Li
Summary: This study focuses on the colorization problem in monochrome-color dual-lens camera systems, proposing a method using Transformer and SCCA blocks, as well as a pyramid processing strategy and RSA blocks to extract more powerful image features. Experimental results show that the proposed method significantly outperforms the state-of-the-art methods on various datasets.
IEEE TRANSACTIONS ON IMAGE PROCESSING
(2022)
Article
Acoustics
Yunyun Sun, Florian Vixege, Khuram Faraz, Simon Mendez, Franck Nicoud, Damien Garcia, Olivier Bernard
Summary: In this article, a numerical framework for generating clinical-like color Doppler imaging (CDI) is presented. Synthetic blood vector fields and realistic clutter artifacts are simulated for evaluating and improving the quality of Doppler imaging techniques.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Article
Acoustics
Jingfeng Lu, Fabien Millioz, Damien Garcia, Sebastien Salles, Dong Ye, Denis Friboulet
Summary: In this study, a complex convolutional neural network called CID-Net is used to reconstruct ultrasound images from I/Q signals. Experimental evidence shows that CID-Net provides the same image quality as RF-trained convolutional neural networks, producing high-quality ultrasound images. Furthermore, CID-Net outperforms simple networks that process I/Q signals separately.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2022)
Review
Dermatology
Maricela Valerio, Marta Camici, Marina Machado, Alicia Galar, Maria Olmedo, Dolores Sousa, Isabel Antorrena-Miranda, Maria Carmen Farinas, Carmen Hidalgo-Tenorio, Miguel Montejo, Antonio Vena, Jesus Guinea, Emilio Bouza, Patricia Munoz
Summary: This study investigated the incidence, clinical characteristics, treatment, and outcome of Aspergillus Endocarditis (AE) in a nationwide multicentric cohort. The results showed that AE has a low incidence rate in infectious endocarditis and mainly affects patients with previous valvular surgery or solid organ transplant. The study also found that mortality is higher in immunosuppressed patients, and a combination of cardiac surgery and azole therapy improves the outcome.
Article
Computer Science, Interdisciplinary Applications
Damien Garcia
Summary: This paper introduces a new ultrasound simulator (SIMUS) for MATLAB, which is characterized by its ease of use, time-harmonic analysis, and pedagogy. It can simulate acoustic pressure fields and radiofrequency RF signals for uniform linear or convex probes. SIMUS can be used for realistic simulations in medical ultrasound imaging.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Computer Science, Interdisciplinary Applications
Amanda Cigier, Francois Varray, Damien Garcia
Summary: This article introduces a new ultrasound simulator, SIMUS, which can be used for pressure field and RF signal simulations in medical ultrasound imaging. By comparing with other ultrasound simulators, the results demonstrate the reliability of SIMUS in simulating medical ultrasound.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Engineering, Biomedical
Florian Vixege, Alain Berod, Pierre-Yves Courand, Simon Mendez, Franck Nicoud, Philippe Blanc-Benon, Didier Vray, Damien Garcia
Summary: Three-dimensional intraventricular vector flow mapping (3D-iVFM) is a method for observing the velocity vector fields of blood flow in the left ventricular cavity through three-dimensional reconstruction. By using a clinical triplane echocardiographic mode, 3D-iVFM is able to recover three-component velocity vector fields in the entire ventricular volume. Our results indicate that 3D-iVFM can accurately estimate the full-volume information of left intraventricular hemodynamics and decipher the dynamics of the intraventricular vortex during systole.
PHYSICS IN MEDICINE AND BIOLOGY
(2022)
Article
Gastroenterology & Hepatology
Ana Gonzalez-Mansilla, Irene Castellote-Dominguez, Sara Fernandez-Quintanilla, Pablo Martinez-Legazpi, Cristina Ripoll, Maria Vega Catalina, Diego Rincon, Francisco Fernandez-Aviles, Rafael Banares, Javier Bermejo
Summary: LV intrinsic systolic cardiac function in cirrhotic patients is influenced by sympathetic activation and the use of non-selective beta-blockers (NSBBs). EIVPD, a non-invasive measurement of systolic function, can be used to assess long-term clinical outcomes. This study aimed to investigate the relationship between EIVPD and clinical outcomes in cirrhotic patients.
GASTROENTEROLOGIA Y HEPATOLOGIA
(2023)
Article
Rheumatology
Jorge Alvarez Troncoso, Clara Soto Abanades, Angel Robles Marhuenda, Elena Martinez Robles, Ana Noblejas Mozo, Roberto Florez Gomez, Esther Perez David, Juan Jose Rios Blanco
Summary: This study aimed to investigate the prevalence, risk factors, and outcomes of cardiac involvement in a Spanish Lupus Clinic. The results showed that cardiac involvement is highly prevalent in SLE patients, with older age and hypertension being significantly associated with it. Abnormal TTE findings were related to neurological, hematological, and serosal involvement, and troponin I and NTproBNP were identified as reliable biomarkers. Presenting cardiac involvement was associated with greater damage accrual and increased mortality risk.
Article
Immunology
Francesc Escrihuela-Vidal, Damaris Berbel, Nuria Fernandez-Hidalgo, Laura Escola-Verge, Patricia Munoz, Maria Olmedo, Miguel Angel Goenaga, Josune Goikoetxea, Mara Carmen Farinas, Arstides De Alarcon, Jose M. Miro, Guillermo Ojeda, Antonio Plata, Guillermo Cuervo, Jordi Carratala, GAMES Investigators
Summary: In a retrospective analysis, it was found that cephalosporin monotherapy was not associated with higher in-hospital mortality when the isolate showed intermediate susceptibility to penicillin. Therefore, for endocarditis caused by penicillin-intermediate streptococci, the use of cephalosporin monotherapy can avoid nephrotoxicity without affecting patient outcomes.
CLINICAL INFECTIOUS DISEASES
(2023)
Article
Infectious Diseases
Juan Ambrosioni, Marta Hernandez-Meneses, Emanuele Durante-Mangoni, Pierre Tattevin, Lars Olaison, Tomas Freiberger, John Hurley, Margaret M. Hannan, Vivian Chu, Bruno Hoen, Asuncion Moreno, Guillermo Cuervo, Jaume Llopis, Jose M. Miro
Summary: This study compared the epidemiological features and outcomes of infective endocarditis (IE) in different European regions and time periods in the 21st century. The results showed that despite an increase in the complexity of IE cases, prognosis has improved in recent years with a significant decrease in 6-month mortality. The source of infection differed between regions, but the outcomes were not different.
INFECTIOUS DISEASES AND THERAPY
(2023)
Review
Cardiac & Cardiovascular Systems
Yaacoub Chahine, Matthew J. Magoon, Bahetihazi Maidu, Juan C. del Alamo, Patrick M. Boyle, Nazem Akoum
Summary: Stroke is a major cause of death globally, and early non-invasive stroke risk stratification is crucial. Current methods focus on clinical risk factors and use statistical associations, but have moderate predictive accuracy. This review explores the use of machine learning (ML) to predict stroke risk and enhance understanding of stroke mechanisms. Comparing ML algorithms with traditional models, as well as using ML for multiscale computational modeling, offers potential for more reliable and personalized predictions.
ARRHYTHMIA & ELECTROPHYSIOLOGY REVIEW
(2023)
Article
Biology
Eduardo Duran, Manuel Garcia-Villalba, Pablo Martinez-Legazpi, Alejandro Gonzalo, Elliot McVeigh, Andrew M. Kahn, Javier Bermejo, Oscar Flores, Juan Carlos del Alamo
Summary: This study, using a high-fidelity patient-specific computational fluid dynamics (CFD) model, investigated for the first time the influence of changes in pulmonary vein (PV) flow split on left atrial (LA) flow transport, focusing on thrombosis in the left atrial appendage (LAA). The results showed that flow patterns were sensitive to PV flow split variations, particularly in planes parallel to the mitral valve. Changes in PV flow split also had a significant impact on blood stasis and could contribute to increased risk for thrombosis inside the LAA, particularly in patients with atrial fibrillation (AF) and previous LAA thrombus or a history of Transient Ischemic Attacks (TIAs). Our study highlights the importance of considering patient-specific PV flow split variations when assessing LA hemodynamics and identifying patients at increased risk for thrombosis and stroke. This knowledge is relevant to planning clinical procedures such as AF ablation or the implementation of LAA occluders.
COMPUTERS IN BIOLOGY AND MEDICINE
(2023)
Article
Acoustics
Hang Jung Ling, Olivier Bernard, Nicolas Ducros, Damien Garcia
Summary: Color Doppler echocardiography provides real-time information about intracardiac blood flow. However, it is subject to phase wrapping or aliasing, especially during cardiac filling and ejection. In this study, we developed a primal-dual network (PDNet) to unwrap (dealias) color Doppler echocardiographic images and compared its effectiveness against other segmentation approaches. Our results showed that the nnU-Net-based method provided the best dealiased results, followed by the primal-dual approach and the transformer-based technique. Overall, deep learning-based methods have the potential to effectively preprocess color Doppler images for quantitative analysis.
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2023)
Article
Immunology
Silvia Vazquez-Cuesta, Nuria Lozano Garcia, Ana I. Fernandez, Maria Olmedo, Martha Kestler, Luis Alcala, Mercedes Marin, Javier Bermejo, Francisco Fernandez-Aviles Diaz, Patricia Munoz, Emilio Bouza, Elena Reigadas
Summary: This study aimed to explore the role of the microbiome and calprotectin levels as predictive biomarkers of recurrent Clostridioides difficile infection (R-CDI). The findings suggest that the abundance of microbial genera such as Fusobacterium and Prevotella and elevated calprotectin levels in primary episodes could be useful as early markers of R-CDI. The researchers also developed a risk index for R-CDI that could help predict the risk of recurrence and tailor treatments accordingly.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2023)