Threshold Detection
Mostrando 1-12 de 280 artigos, teses e dissertações.
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1. Usefulness of the neutrophil-to-lymphocyte ratio in predicting the severity of COVID-19 patients: a retrospective cohort study
ABSTRACT BACKGROUND: Quick and accurate identification of critically ill patients ensures appropriate and correct use of medical resources. In situations that threaten public health, like pandemics, rapid and effective methods are needed for early disease detection among critically ill patients. OBJECTIVE: To determine the relationship between the neutro
Sao Paulo Medical Journal. Publicado em: 2022
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2. Evaluation of OFDM Channel Sounding Techniques with Three Modulation Sequences
Abstract This paper presents an evaluation of multicarrier channel sounding techniques using different random and pseudo-random sequences to modulate the OFDM sounding signal. The Random (Rand), Pseudo-Noise (PN) and Zadoff-Chu (ZC) were tested, both in laboratory simulations and in field measurements. For the laboratory simulations Matlab routines were used
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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3. Standardization of Antigenemia and qPCR Cut-off Values in Whole Blood for the Detection of Cytomegalovirus Disease in HIV Patients
Abstract INTRODUCTION: We defined the cut-off values of the antigenemia and cytomegalovirus (CMV) DNA tests in HIV/AIDS patients to identify CMV disease. METHODS: A total of 97 samples from 68 patients with and without CMV disease were analyzed by viral DNA detection and antigenemia assay. RESULTS: Qualitative and quantitative results significantly diffe
Rev. Soc. Bras. Med. Trop.. Publicado em: 27/06/2019
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4. Automated cortical auditory evoked potentials threshold estimation in neonates
Resumo Introdução: O potencial evocado auditivo cortical tem sido o foco de estudos científicos. Alguns autores observaram que a detecção automatizada de respostas é eficaz na exploração desses potenciais em lactentes, mas poucos relataram sua eficácia na busca de limiares. Objetivo: Analisar a latência, a amplitude e os limiares do potencial evo
Braz. j. otorhinolaryngol.. Publicado em: 29/04/2019
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5. Analytical validation of real-time quantitative PCR assays for optimum diagnosis of vivax malaria
BACKGROUND The prompt diagnosis of plasmodial species for effective treatment prevents worsening of individual health and avoids transmission maintenance or even malaria reintroduction in areas where Plasmodium does not exist. Polymerase chain reaction (PCR) allows for the detection of parasites below the threshold of microscopic examination. OBJECTIVE O
Mem. Inst. Oswaldo Cruz. Publicado em: 31/01/2019
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6. Robust pulmonary segmentation for chest radiography, combining enhancement, adaptive morphology and innovative active contours
Abstract Introduction Statistical data reveal that approximately 140 million radiological exams are performed annually in Brazil. These exams are designed to detect and to analyze fractures, caused by different types of trauma; as well as, to diagnose pathologies such as pulmonary diseases. For better visualization of those lesions or abnormalities, method
Res. Biomed. Eng.. Publicado em: 13/09/2018
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7. Real-time premature ventricular contractions detection based on Redundant Discrete Wavelet Transform
Abstract Introduction Premature Ventricular Contraction (PVC) is among the most common types of ventricular cardiac arrhythmia. However, it only poses danger if the person suffers from a heart disease, such as heart failure. Hence, this is an important factor to consider in heart disease people. This paper presents an ECG real-time analysis system for PVC
Res. Biomed. Eng.. Publicado em: 26/07/2018
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8. Accuracy of visual and image-based ICDAS criteria compared with a micro-CT gold standard for caries detection on occlusal surfaces
Abstract The aim of this study was to check the in vitro accuracy of ICDAS criteria on digital images compared to visual examination for the diagnosis of occlusal caries against a micro-CT gold standard. ICDAS was scored in 40 extracted permanent molars by means of visual inspection and stereomicroscopic images. Visual examinations were performed in duplicat
Braz. oral res.. Publicado em: 10/07/2018
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9. Performance quantification of clustering algorithms for false positive removal in fMRI by ROC curves
Abstract Introduction Functional magnetic resonance imaging (fMRI) is a non-invasive technique that allows the detection of specific cerebral functions in humans based on hemodynamic changes. The contrast changes are about 5%, making visual inspection impossible. Thus, statistic strategies are applied to infer which brain region is engaged in a task. Howeve
Res. Biomed. Eng.. Publicado em: 2017-03
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10. Auditory Temporal Resolution in Individuals with Diabetes Mellitus Type 2
Abstract Introduction "Diabetes mellitus is a group of metabolic disorders characterized by elevated blood sugar and abnormalities in insulin secretion and action" ( American Diabetes Association). Previous literature has reported connection between diabetes mellitus and hearing impairment. There is a dearth of literature on auditory temporal resolution ab
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-12
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11. Temporal Resolution and Active Auditory Discrimination Skill in Vocal Musicians
Abstract Introduction Enhanced auditory perception in musicians is likely to result from auditory perceptual learning during several years of training and practice. Many studies have focused on biological processing of auditory stimuli among musicians. However, there is a lack of literature on temporal resolution and active auditory discrimination skills i
Int. Arch. Otorhinolaryngol.. Publicado em: 2016-12
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12. In-house quantitative real-time PCR for the diagnosis of hepatitis B virus and hepatitis C virus infections
Abstract The quantification of viral nucleic acids in serum by real-time PCR plays an important role in diagnosing hepatitis B virus and hepatitis C virus infection. In this study, we developed an assay using specific primers and probes to quantify hepatitis B virus DNA or hepatitis C virus RNA in serum from infected patients. For standardization and validat
Braz. J. Microbiol.. Publicado em: 2016-12