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Photoacoustic-based thermal image formation and optimization using an evolution...
Uliana,João Henrique; Sampaio,Diego Ronaldo Thomaz; Carneiro,Antonio Adilton Oliveira; Pavan,Theo ZeferinoAbstract Introduction For improved efficiency and security in heat application during hyperthermia, it is important to monitor tissue temperature during treatments. Photoacoustic (PA) pressure wave amplitude has a temperature dependence given by the Gruenesein parameter. Consequently, changes in PA signal amplitude carry information about temperature variation in tissue. Therefore, PA has been proposed as an im...
Reproducibility of abdominal fat assessment by ultrasound and computed tomography
Mauad,Fernando Marum; Chagas-Neto,Francisco Abaeté; Benedeti,Augusto César Garcia Saab; Nogueira-Barbosa,Marcello Henrique; Muglia,Valdair FranciscoAbstract Objective: To test the accuracy and reproducibility of ultrasound and computed tomography (CT) for the quantification of abdominal fat in correlation with the anthropometric, clinical, and biochemical assessments. Materials and Methods: Using ultrasound and CT, we determined the thickness of subcutaneous and intra-abdominal fat in 101 subjects-of whom 39 (38.6%) were men and 62 (61.4%) were women-with ...
A magneto-motive ultrasound platform designed for pre-clinical and clinical app...
Sampaio,Diego Ronaldo Thomaz; Grillo,Felipe Wilker; Bruno,Alexandre Colello; Pavan,Theo Zeferino; Carneiro,Antonio Adilton OliveiraAbstract Introduction Magneto-motive ultrasound (MMUS) combines magnetism and ultrasound (US) to detect magnetic nanoparticles in soft tissues. One type of MMUS called shear-wave dispersion magneto-motive ultrasound (SDMMUS) analyzes magnetically induced shear waves (SW) to quantify the elasticity and viscosity of the medium. The lack of an established presets or protocols for pre-clinical and clinical studies ...
A computational tool as support in B-mode ultrasound diagnostic quality control
Senra Filho,Antonio Carlos da Silva; Rodrigues,Erbe Pandini; Elias Junior,Jorge; Carneiro,Antonio Adilton OliveiraINTRODUCTION: The quality control (QC) of biomedical equipment is a very important process for the quality assurance of the instruments used in diagnoses and treatments. Ultrasound diagnostic imaging is one of the most widely used techniques for diagnostic imaging in hospitals and medical clinics. However, the time required to complete several B-mode imaging QC tests in ultrasound equipment is very critical for...
Princípios físicos da elastografia por ressonância magnética
Vieira,Sílvio Leão; Oliveira,Lucas Nonato de; Carneiro,Antonio Adilton OliveiraEste trabalho constitui os primeiros esforços em apresentar ao público de língua portuguesa uma nova ferramenta, com potencial uso clínico, para estudar propriedades mecânicas de materiais e tecidos vivos. Busca-se apresentar propostas de exploração de modalidades de aquisição e processamento de imagens por ressonância magnética (IRM). A Elastografia por Ressonância Magnética (ERM) é um novo procedimento que pe...
Influência da obesidade e da força de preensão palmar no equilíbrio postural es...
Carneiro,José Ailton Oliveira; Almeida,Daniel Salvini; Vilaça,Karla Helena Coelho; Pfrimer,Karina; Santos-Pontelli,Taiza Elaine GrespanO objetivo deste estudo foi investigar a influência da obesidade e da força de preensão palmar (FPP) no equilíbrio postural estático de idosas ativas nas condições de olhos abertos e fechados. Participaram 31 idosas (16 eutróficas e 15 obesas). A idade média e o Índice de Massa Corpórea (IMC) das eutróficas foram, respectivamente, 68,3±2,7 anos e 23,4±1,6kg/m², e das obesas 69,1±2,7 anos e 33,5±3kg/m². A FPP fo...