Search results for "Non invasive"

Echocardiographic reference ranges for normal non-invasive myocardial work indices: results from the EACVI NORRE study

2019

International audience; Aims - To obtain the normal ranges for 2D echocardiographic (2DE) indices of myocardial work (MW) from a large group of healthy volunteers over a wide range of ages and gender. Methods and results - A total of 226 (85 men, mean age: 45 ± 13 years) healthy subjects were enrolled at 22 collaborating institutions of the Normal Reference Ranges for Echocardiography (NORRE) study. Global work index (GWI), global constructive work (GCW), global work waste (GWW), and global work efficiency (GWE) were estimated from left ventricle (LV) pressure-strain loops. Peak LV systolic pressure was non-invasively derived from brachial artery cuff pressure. The lowest values of MW indic…

(Non-) invasive mapping of cortical language areas

2015

Porous materials applied to biomarker sensing in exhaled breath for monitoring and detecting non-invasive pathologies

2020

International audience; Overview of the use of porous materials for gas sensing to analyze the exhaled breath of patients for disease identification.The quantification of specific gases among thousand of VOCs (Volatile Organic Compounds) present in the human breath at the ppm/ppb level can be used to evidence the presence of diseases in the human body. The detection of these biomarkers in human exhaled breath through a noninvasive approach is an important field of research which is still attracting important attention to this day. A portable device working at room temperature and usable directly on exhaled breath samples is still a challenge requiring a sensing material with high performanc…

A multi-sphere particle numerical model for non-invasive investigations of neuronal human brain activity

2013

In this paper, a multi-sphere particle method is built- up in order to estimate the solution of the Poisson's equation with Neumann boundary conditions describing the neuronal human brain activity. The partial difierential equations governing the relationships between neural current sources and the data produced by neuroimaging technique, are able to compute the scalp potential and magnetic fleld distributions generated by the neural activity. A numerical approach is proposed with current dipoles as current sources and going on in the computation by avoiding the mesh construction. The current dipoles are into an homogeneous spherical domain modeling the head and the computational approach i…

Non-invasive mechanical ventilation and high-flow oxygen therapy in the COVID-19 pandemic: the value of a draw

2021

Nanostructured protective for historical-artistic stone materials: evaluation of effectiveness and persistence by non invasive techniques

2014

A multi-analytical non-invasive and micro-invasive approach to canvas oil paintings. General considerations from a specific case

2017

Abstract The investigation of artwork to understand story, state of conservation and to know about the composing materials is an issue that is getting growing attention in specialized literature. From a methodological point of view the scientific community is trying to reach a common proposal that could contribute to define a Standard Operating Procedure (SOP) for the application of portable non-invasive and microinvasive techniques for in-situ analyses. In this paper the oil painting on canvas “St. Girolamo nello studio” by Nicolo Buttafoco was investigated to known the materials and techniques used by the artist as well as to evaluate its preservation status. The survey has been conducted…

Multivariable non-invasive association of isocitrate dehydrogenase mutational status in World Health Organization grade II and III gliomas with advan…

2020

Aim To investigate multivariable analyses for noninvasive association of the isocitrate dehydrogenase (IDH) mutational status in grade II and III gliomas including evaluation of T2 mapping-sequences. Methods Magnetic resonance imaging (MRI) examinations with histopathologically proven World Health Organization grade II and III gliomas were retrospectively enrolled. Multivariate receiver operating characteristics (ROC) analyses to associate IDH mutational status were performed containing quantitative T2 mapping analyses and qualitative characteristics (sex, age, localization, heterogeneity, oedema, necrosis and diameter). Relaxation times were calculated pixelwise by means of standardized RO…

Cost-effectiveness of recall strategies for non-invasive diagnosis of small hepatocellular carcinoma

2009

Non-invasive diagnosis of oral cancer: The role of electro-analytical methods and nanomaterials

2017

Abstract Oral cancer is a kind of head and neck cancer and is each cancerous tissue growth located in the oral cavity. Non-invasive early diagnosis of oral cancer is the most effective means to reduce death from this disease or increase the survival time. In this review, various types of electro-analytical methods for detection of oral cancer were discussed. The emphasis is placed on non-invasive detection of oral based on immune-, geno-, cyto-, apta-, and enzyme-biosensing strategies. In the first part of review, various electrochemical immunosensing methods for the detection of common biomarker in oral cancer and examines their potential as a new method were discussed. In the second part …