Medical Physics
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. A numerical study about the determination of parameters in an incompressible and linearly elastic solid / Estudo numérico sobre a determinação de parâmetros em um sólido elástico-linear e incompressível
The theory of classical linear elasticity is used to model of problems in medical physics that are related to the determination of elastic parameters of biological tissues from the measurement in vivo, or, in vitro of either displacements or strains. Based on experimental observations, which indicate that the abnormal biological tissues have different mechan
Publicado em: 2008
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14. Assessment of radiotherapic treatments with thermoluminescent dosimetry / Verificação de tratamentos radioterápicos diversos com dosimetria termoluminescente
The last decades noticed a massive improvement in radiotherapy techniques and the use of segmented beams produced by multileaf collimators. However, the dose radiation therapy planning systems (TPS) in use are characterized by the restriction of access to the calculation algorithms. The aim of this work was to compare dose values measured in an anthropomorph
Publicado em: 2007
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15. Validação do Geant4 para a produção e detecção de raios X na faixa de energia de radiodiagnóstico / Validation of Geant4 for X-ray production and detection in the radiodiagnostic energy range
Este trabalho teve como objetivo validar uma ferramenta computacional para a realização de simulações da interação de elétrons e da radiação X com a matéria, utilizando o método de Monte Carlo para possíveis estudos em radiologia diagnóstica. Para esse propósito, foi desenvolvido um programa computacional que simula a produção de radiação d
Publicado em: 2007
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16. "The tecnology transfer at USP: a multicase study in the Physics and Mathematics Departament and in the Medical School and Dentistry School - Ribeirão Preto campus - and in the companies of the medical, hospital and odontologic equipment industry" / "A transferência de tecnologia na USP: um estudo multicaso no Departamento de Física e Matemática e nas faculdades de medicina e odontologia - campus Ribeirão Preto - e nas empresas do setor de equipamentos médicos, hospitalares e odontológicos"
This thesis has verified the possibilities of technology transfer from the Department of Physics and Mathematics, the Medical School and the Dentistry School, located in the campus of USP in Ribeirão Preto, to the medical, hospital and odontologic equipment industry. The method applied was the multicase study, in which the university units were studied, as
Publicado em: 2005
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17. Panorama das exposições médicas em radiologia convencional no Estado de São Paulo / Overview of the medical exposures in coventional radiology in the State of São Paulo
Patients dosimetry, associated with the assessment of the performance of the radiological equipment and of the series of procedures employed in the accomplishment of the examinations, plays fundamental role in the radiation protection system of medical exposures. Therefore, a large-scale survey of absorbed doses was carried out in health services localized i
Publicado em: 2005
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18. Sobre o calculo de atenuação e de atividade em tomografia por emissão a partir de dados de atividade / Activity and attenuation reconstruction for emission computed tomography using emisssion data only
This thesis eals with the problem of estimating the attenuation from activity ata in emission computed tomography.We present several new methods aiming at solving the main rawback of the problem:the `crosstalk`between activity and attenuation images.The first group of methods is base on iteratively solving a regularized maximum likelihood model and the secon
Publicado em: 2004
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19. Epistemologia contemporanea e saude : a luta pela verdade e as praticas terapeuticas
Several relational, both ethical and therapeutical dilemmas of the attention to biomedical health are related to certain aspects of the hegemonic epistemology in healthcare, which is based on a positivist, Cartesian, representational and mechanical ideal, deriving from classical Physics. This ideal also renders difficult the relationship between biomedicine
Publicado em: 2004
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20. Psicossociais aspects of the auto-examination: implications in one another look of the prevention of the breast cancer / Aspectos psicossociais do auto-exame: implicações num outro olhar da prevenção do câncer de mama
The breast cancer is a pathology that has crescent incidence, in the countries of higher degree of development like in the countries in development. There are evidences that its causes seem to have relation to modern life style, of difficult control. In this context, the efforts are direct to secondary prevention, in order to make an early diagnosis of tumor
Publicado em: 2004
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21. Protein folding: a perspective for biology, medicine and biotechnology
At the present time, protein folding is an extremely active field of research including aspects of biology, chemistry, biochemistry, computer science and physics. The fundamental principles have practical applications in the exploitation of the advances in genome research, in the understanding of different pathologies and in the design of novel proteins with
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-04
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22. A sindrome da tensão pre-menstrual : uma abordagem psicanalitica
The interest for this research is guided on the questions appeared in the psychoanalytic clinic, starting from the attendance of Premenstrual Tension Syndrome (PMTS) patients victims and their symptomatic manifestations, not only physics, but predominantly psychic. Although it is considered by the medicine as a resulting disease of the organic and hormonal a
Publicado em: 2001
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23. Reconstituição facial computadorizada e sua importancia na identificação
A odontologia forense tem demonstrado grande importância nos processos de identificação humana. Dentre suas aplicações, a reconstituição facial possuiu especial atenção por permitir ao processo uma visualização das características faciais da identificação realizada. Entretanto, as técnicas utilizadas para a obtenção de um rosto aplicável à
Publicado em: 2000
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24. ConstruÃÃo de um nariz artificial usando redes neurais
The animals interact with environment in several ways. The smell around them has an extremely importance in the information transport, essential for survival. Such as for the animals, the smell plays an important rule for human beings. Due to this importance, the study in the human olfactory system is very helpful and started very long time ago. Although it
Publicado em: 2000