Filipe Ramos, Bertrand de Toffol, B Aesch, M Jan,
The association of a tumor of the cauda equina and hydrocephalus is unusual. We report a case of hydrocephalus with normal pressure associated with an equally rare affliction, a cavernous angioma of the cauda equina, which regressed after surgical ablation. The physiological mechanism involved is discussed.
Tópico(s): Neurosurgical Procedures and Complications
1990 - Lippincott Williams & Wilkins | Neurosurgery
Produção Nacional
Revisado por pares
Fabrício Guimarães Gonçalves, M.B. de Melo, Valentina Matos, Filipe Ramos Barra, Ramón Figueroa,
SUMMARY: Lipoid proteinosis is a rare genodermatosis characterized by multisystem involvement due to intracellular deposition of an amorphous hyaline material. Lipoid proteinosis is caused by mutations in the ECM1 gene. In many patients, skin and mucosa abnormalities are the first manifestation. When the CNS is affected, a wide variety of neurologic abnormalities may be present. The hallmark findings are calcifications, mostly occurring in the amygdalae, hippocampus, parahippocampal gyrus, or even the striatum. ...
Tópico(s): Urological Disorders and Treatments
2009 - American Society of Neuroradiology | American Journal of Neuroradiology
Produção Nacional
André Ferreira Leite, Paulo Tadeu de Souza Figueiredo, Filipe Ramos Barra, Nilce Santos de Melo, Ana Patrícia de Paula,
The aim of this study was to assess relationships between panoramic indexes, bone mineral density (BMD), and osteoporotic fractures in men >60 years old.Body height and weight, body mass index, lumbar spine and hip BMD, and the presence of osteoporotic fractures were determined in the 127 studied men. Dental panoramic radiographs (DPRs) were used for measuring mandibular cortical indexes.BMDs were lower in patients with thinning and resorption of mandibular cortex. No association was found between ...
Tópico(s): Pelvic and Acetabular Injuries
2011 - Elsevier BV | Oral Surgery Oral Medicine Oral Pathology Oral Radiology and Endodontology
Filipe Ramos Barra, Renato Ramos Barra, Alaor Barra Sobrinho,
O câncer de mama é um dos mais prevalentes nas mulheres. A mamografia é um excelente método com impacto comprovado na redução da mortalidade pelo câncer de mama. Porém, não é um método perfeito, apresentando alguns pontos fracos, principalmente no rastreamento de mulheres com mamas densas, estadiamento e avaliação de tratamento. A ressonância magnética mamária mostrou a necessidade e importância da avaliação funcional mamária. Descrevemos dois métodos de avaliação funcional mamária e demonstramos ...
Tópico(s): Breast Lesions and Carcinomas
2012 - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem | Radiologia Brasileira
Parag Kulkarni, Sedat Görmüş, Zhong Fan, Filipe Ramos,
Automated metering is expected to be an integral part of the modern energy grid. Automated metering entails transport of metering data from the energy consumer's premises to the data management systems of the energy provider and potentially information in the other direction. This paper describes a practical mesh networking solution based on extensions proposed to the routing protocol for low power and lossy networks (RPL) to realize automated metering communications. This solution comprises self- ...
Tópico(s): Vehicular Ad Hoc Networks (VANETs)
2012 - Institute of Electrical and Electronics Engineers | IEEE Transactions on Smart Grid
Produção Nacional
Revisado por pares
PT de Souza Figueiredo, André Ferreira Leite, Filipe Ramos Barra, Renata Fockink dos Anjos, Ana Carolina Freitas, Leonel Alves do Nascimento, NS Melo, Eliete Neves Silva Guerra,
The aim of the study was to verify the concordance of contrast-enhanced CT (CECT) and MRI evaluation among four radiologists in detecting metastatic cervical lymph nodes of oral cancer patients.Ten patients underwent clinical and imaging examinations (CECT and MRI). Four radiologists, two oral and maxillofacial radiologists (OMRs) and two medical radiologists (MRs), independently analysed the images twice. Cohen's kappa index and Wilcoxon signed-rank test were used to verify the concordance between ...
Tópico(s): Bone and Joint Diseases
2012 - Oxford University Press | Dentomaxillofacial Radiology
Produção Nacional
Revisado por pares
Marcos Célio de Almeida, Felipe V. Lopes, Pedro Ribeiro Fontes, Filipe Ramos Barra, Rubens Vieira Guimarães, Virginia Vilhena,
Tópico(s): ECG Monitoring and Analysis
2014 - Springer Science+Business Media | Anatomical Science International
Raul Martinez Oviedo, Filipe Ramos, Sedat Görmüş, Parag Kulkarni, Mahesh Sooriyabandara,
Wireless sensor networks (WSNs) are attracting attention in the context of smart grids as they can facilitate the development of future energy consumption monitoring systems. In this paper, we present a comparison of the performance of four WSN architectures for energy consumption monitoring. The aim of this work is to explore the benefits of having distributed storage and processing compared with centralized approaches. Performance of the architectures was evaluated, considering energy consumption, ...
Tópico(s): Energy Harvesting in Wireless Networks
2013 - Institute of Electrical and Electronics Engineers | IEEE Systems Journal
Produção Nacional
Revisado por pares
Filipe Ramos Barra, Fernanda Freire de Souza, Rosimara Eva Ferreira Almeida Camelo, Andréa Campos de Oliveira Ribeiro, Luciano Farage,
To assess the feasibility of contrast-enhanced spectral mammography (CESM) of the breast for assessing the size of residual tumors after neoadjuvant chemotherapy (NAC).In breast cancer patients who underwent NAC between 2011 and 2013, we evaluated residual tumor measurements obtained with CESM and full-field digital mammography (FFDM). We determined the concordance between the methods, as well as their level of agreement with the pathology. Three radiologists analyzed eight CESM and FFDM measurements ...
Tópico(s): Breast Lesions and Carcinomas
2017 - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem | Radiologia Brasileira
Matthias Meißnitzer, D. David Dershaw, Kimberly Feigin, Blanca Bernard‐Davila, Filipe Ramos Barra, Elizabeth A. Morris,
This study was undertaken to examine the characteristics of cancers detected at the earliest possible point on MRI and to determine their significance.This institutional review board-approved Health Insurance Portability and Accountability Act-compliant retrospective study evaluated invasive breast cancers ≤1 cm histologically. MRI was performed within 6 months before diagnosis. Between 1 January 2005 and 31 December 2015, 163 cancers in 161 patients were evaluated. Breast Imaging-Reporting and Data ...
Tópico(s): Radiomics and Machine Learning in Medical Imaging
2017 - Wiley | British Journal of Radiology
Produção Nacional
Revisado por pares
Filipe Ramos Barra, Alaor Barra Sobrinho, Renato Ramos Barra, Mayra Teixeira Magalhães, Laira Rodrigues Aguiar, Gabriela Feitosa Lins de Albuquerque, Rodrigo Pepe Costa, Luciano Farage, Riccardo Pratesi,
Objective . To evaluate the performance of contrast-enhanced mammography (CEM) compared to magnetic resonance imaging (MRI) for estimating residual tumor size after neoadjuvant chemotherapy (NAC) in women with newly diagnosed breast cancer. Methods . The institutional review board approved this study. This prospective study included women with newly diagnosed breast cancer who underwent breast CEM and MRI at the end of the last cycle of NAC and before definitive surgery. Size of residual malignancy on ...
Tópico(s): MRI in cancer diagnosis
2018 - Hindawi Publishing Corporation | BioMed Research International
C. Filipe Ramos, Rodolfo C. Rocha, Pedro M.R. Oliveira, Mário Costa, Xue‐Song Bai,
Ammonia (NH3) is regarded as one of the most viable alternatives to produce carbon-free energy. However, its low flammability and high NOx emissions associated with its combustion inhibit the implementation of pure NH3 as a fuel. Dual-fuel approaches with NH3 and more reactive fuels have been proposed; however, information on pollutant emissions is still scarce. The present work focuses on quantifying the gaseous pollutant emissions from the combustion of mixtures of NH3 and CH4 as a function of ...
Tópico(s): Catalytic Processes in Materials Science
2019 - Elsevier BV | Fuel
Rodolfo C. Rocha, C. Filipe Ramos, Mário Costa, Xue‐Song Bai,
Ammonia (NH3) is currently in the spotlight because of its potential in serving as an energy resource devoid of carbon. Combustion of NH3, however, presents several drawbacks, such as high ignition temperature, low flame speed, and high NOx emissions. Furthermore, although dual-fuel approaches may provide a solution for some of these problems, scarcity of information on the resulting emissions inhibits a large-scale adoption. Therefore, the present work is focused on studying gaseous pollutants, ...
Tópico(s): Advanced Combustion Engine Technologies
2019 - American Chemical Society | Energy & Fuels
Bo Shu, Xiaoyu He, C. Filipe Ramos, Ravi X. Fernandes, Mário Costa,
Ammonia (NH3) is considered as a promising carbon free energy carrier for energy and transportation systems. However, its low flammability and high NOx emission potential inhibit the implementation of pure NH3 in these systems. On the other hand, methane is a favorable low emission fuel that can be used as a co-firing fuel in ammonia combustion to promote the reactivity and control the emission levels. However, knowledge of the ignition properties of NH3/CH4 mixtures at intermediate temperatures ...
Tópico(s): Atmospheric chemistry and aerosols
2020 - Elsevier BV | Proceedings of the Combustion Institute
Tiago Órfão, Sara Júlio, José Filipe Ramos, Cláudia Camila Dias, Helena Silveira, Margarida Santos,
Objective To evaluate and compare the audiometric outcomes of ossicular reconstruction with titanium prosthesis and autologous material. Study Design Retrospective cohort study. Setting Tertiary referral center. Subjects and Methods Audiometric results of consecutive patients who performed ossiculoplasty with titanium prosthesis (n = 43) or autologous material (n = 48), from October 2008 to December 2011, were reviewed retrospectively and compared. The association between air‐bone gain and age, ossiculoplasty ...
Tópico(s): Ear and Head Tumors
2014 - Wiley | Otolaryngology
Filipe Ramos Barra, Renato Ramos Barra, Alaor Barra Sobrinho,
OBJETIVO: Pesquisar visualizadores de imagens médicas gratuitos disponíveis na internet capazes de funcionar como cliente PACS (picture archiving and communication system) e avaliar suas principais funções e a viabilidade do uso em computadores pessoais. MATERIAIS E MÉTODOS: Foi feita pesquisa, no Google e em sites especializados, por programas gratuitos disponíveis para o Windows. Foram encontrados cerca de 70, sendo 11 capazes de funcionar como cliente PACS, e selecionados seis destes para análise: ...
Tópico(s): Digital Radiography and Breast Imaging
2010 - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem | Radiologia Brasileira
Produção Nacional
Revisado por pares
Nicandro Figueiredo, Filipe Ramos Barra, Laryssa Brito Moraes, Roger Rotta, Luíz Augusto Casulari,
A total of 47 percutaneous vertebroplasties (PVs) were performed for osteoporotic vertebral fractures in 31 patients, 25 PVs were performed using the frontal-opening cannula (FOC) and 22 using the new side-opening cannula (SOC), randomly distributed. The incidence of cement extrusion was 27% with the SOC, and 68% with the FOC, all asymptomatic (p<0.01). The pain control was similar for both groups, with good improvement of pain in most of the patients, and there were no clinical relevant complications. ...
Tópico(s): Pelvic and Acetabular Injuries
2009 - Thieme Medical Publishers (Germany) | Arquivos de Neuro-Psiquiatria
Produção Nacional
Revisado por pares
Fabrício Guimarães Gonçalves, Filipe Ramos Barra, Valter de Lima Matos, Cássio Lemos Jovem, Lázaro Luís Faria do Amaral, Raquel delCarpio-O'Donovan,
O uso de sinais ou analogias na interpretação de imagens na radiologia médica é prática comum e antiga entre os radiologistas. Comparação entre achados de imagem com animais, alimentos ou objetos se faz de modo natural. Muitos sinais são bastante específicos e em alguns casos patognomônicos. Independentemente do grau de especificidade, sinais auxiliam a prática radiológica. Vários sinais já foram descritos em neurorradiologia. Neste artigo os autores demonstrarão 15 sinais neurorradiológicos. Serão ...
Tópico(s): Acute Ischemic Stroke Management
2011 - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem | Radiologia Brasileira
Jean-Baptiste Thomas, Filipe Silva Ramos, Fredrïk Gröndahl,
Special attention has been paid to sustainable macroalgae cultivation in Europe. The question on where suitable cultivation areas lie, without conflicting with current marine socio-economic activities and respecting the environment, remains a great challenge. Considering 13 criteria critical to seaweed farming such as depth, shipping traffic, and distance to ports, this paper aimed to identify suitable and sustainable offshore areas on the West Coast of Sweden for the cultivation of the Sugar Kelp, ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2019 - Taylor & Francis | Coastal Management
Lihki Rubio, Adriana Palacio Pinedo, Adriana Mejía Castaño, Filipe Ramos,
Abstract Forecasting volatility of certain stocks plays an important role for investors as it allows to quantify associated trading risk and thus make right decisions. This work explores econometric alternatives for time series forecasting, such as the ARIMA and GARCH models, which have been widely used in the financial industry. These techniques have the advantage that training the models does not require high computational cost. To improve predictions obtained from ARIMA, the discrete Fourier ...
Tópico(s): Financial Risk and Volatility Modeling
2023 - Springer Nature | Eurasian economic review
Filipe Ramos Barra, Andréa Campos de Oliveira Ribeiro, O. Mathieu, Ana Clara Tude Rodrigues,
Tópico(s): Medical Imaging Techniques and Applications
2014 - Elsevier BV | Diagnostic and Interventional Imaging
Produção Nacional
Revisado por pares
Marcel Gutierrez, Thiago Artioli, Fábio Iazzetti Lopes, Filipe Ramos Monteiro, Sandra Di Felice Boratto,
SUMMARY INTRODUCTION: Acute appendicitis (AA) is the most common cause of surgical acute abdomen. Postoperative complications in emergency care are reflections of the surgical procedure and pre- and postoperative factors. OBJECTIVE: Define prognostic factors for patients who underwent appendectomy, comparing them with the literature. METHODS: Descriptive observational study with a cross-sectional design based on data from the emergency/urgency appendectomy records between September 2018 and April ...
Tópico(s): Cardiac, Anesthesia and Surgical Outcomes
2020 - Brazilian Medical Association | Revista da Associação Médica Brasileira
Produção Nacional
Revisado por pares
Filipe Ramos Barra, Fabrício Guimarães Gonçalves, Valter de Lima Matos, Cássio Lemos Jovem, José Luis Furtado de Mendonça, Lázaro Luís Faria do Amaral, Raquel delCarpio-O'Donovan,
O uso de sinais na interpretação de imagens na neurorradiologia é extremamente útil. Muitos sinais são bastante específicos e em alguns casos, patognomônicos. Nesta segunda parte os autores descreverão 15 sinais neurorradiológicos adicionais. Serão novamente abordadas as principais características de imagem de cada um e sua importância na prática clínica.
Tópico(s): Cerebrovascular and Carotid Artery Diseases
2011 - Colégio Brasileiro de Radiologia e Diagnóstico por Imagem | Radiologia Brasileira
Miguel Azenha, Rui Faria, Filipe Magalhães, Leonel Ramos, Álvaro Cunha,
Tópico(s): Structural Engineering and Vibration Analysis
2011 - Springer Science+Business Media | Materials and Structures
Produção Nacional
Epitácio Leite Rolim Filho, MARCELO RAUL CAVALCANTI TORRES, MAURISTON RENAN MARTINS SILVA, FILIPE RAMOS LIMA, José Lamartine de Andrade Aguiar,
Objectives: To present a simplified calculation for the measurement of osteotomy wedges used for the correction of angular uniplanar deformities of long bones and to compare the simplified calculation proposed (circumferential calculation) with the classical trigonometric calculations, as well as with the exact calculation performed by computer software AutoCADtm. Methods: The software AutoCADtm was used to calculate the bone wedges, for mathematical comparison of the three main groups, each one ...
Tópico(s): Hip disorders and treatments
2016 - Brazilian Society of Orthopedics and Traumatology | Acta Ortopédica Brasileira
Tiago E. Pratas, Filipe Ramos, Lihki Rubio,
Abstract This study aims to evaluate forecasting properties of classic methodologies (ARCH and GARCH models) in comparison with deep learning methodologies (MLP, RNN, and LSTM architectures) for predicting Bitcoin's volatility. As a new asset class with unique characteristics, Bitcoin's high volatility and structural breaks make forecasting challenging. Based on 2753 observations from 08-09-2014 to 01-05-2022, this study focuses on Bitcoin logarithmic returns. Results show that deep learning methodologies ...
Tópico(s): Financial Risk and Volatility Modeling
2023 - Springer Nature | Eurasian economic review
Maria A.M. Reis, Luísa S. Serafim, Paulo C. Lemos, A.M. Ramos, Filipe Aguiar, Mark C.M. van Loosdrecht,
Tópico(s): Microplastics and Plastic Pollution
2003 - Springer Science+Business Media | Bioprocess and Biosystems Engineering
Filipe Vieira, Helena M. Ramos,
Water supply systems (WSS) frequently present high-energy consumption values, which correspond to the major expenses of these systems. Energy costs are a function of its real consumption and of the variability of the daily energy tariff. This paper presents a model of optimization for the energy efficiency in a water supply system. The system is equipped with a pump station and presents excess of available energy in the gravity branch. First, a water turbine is introduced in the system in order to ...
Tópico(s): Wind Energy Research and Development
2008 - Elsevier BV | Renewable Energy
Filipe Vieira, Helena M. Ramos,
Environmental targets and saving energy have become ones of the world main concerns over the last years and it will increase and become more important in a near future. The world population growth rate is the major factor contributing for the increase in global pollution and energy and water consumption. In 2005, the world population was approximately 6.5 billion and this number is expected to reach 9 billion by 2050 [United Nations, 2008. www.un.org, accessed on July]. Water supply systems use energy ...
Tópico(s): Water-Energy-Food Nexus Studies
2008 - Elsevier BV | Energy Policy
Produção Nacional
Revisado por pares
Domenico Otranto, Emanuele Brianti, Francesca Abramo, Gabriella Gaglio, Ettore Napoli, Maria Stefanía Latrofa, Rafael Antonio Nascimento Ramos, Filipe Dantas‐Torres, Odile Bain,
The aim of this study was to investigate the anatomical distribution of microfilariae of a recently described Cercopithifilaria sp. and the relationship with the preferred attachment sites of its vector, the brown dog tick Rhipicephalus sanguineus. Skin samples from 20 dogs were collected from eight anatomical sites and soaked twice in saline solution at 37 °C. All samples were also molecularly processed for the specific amplification of partial cytochrome c oxidase 1 gene. Microfilariae were unevenly ...
Tópico(s): Mosquito-borne diseases and control
2012 - Elsevier BV | Veterinary Parasitology