Interface Dosimetry
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Development of an optical fluorescence imaging system for medical use / Desenvolvimento de um sistema por imagem de fluorescência óptica para uso médico-odontológico
Optical fluorescence has been applied to several medical areas, as to monitor drug degradation and cancer detection, due to its high sensitivity, simplicity and fast response. Non-invasive and non-destructive assessment of tissues using this technique is very attractive for clinical diagnosis. Hence, the aim of was the development of an optical fluorescence
Publicado em: 2010
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2. Estudos dosimétricos em interfaces teciduais em radioterapia utilizando dosimetria por ressonância paramagnética eletrônica EPR / Studies on Tissue Interfaces Dosimetry in Radiotherapy Using Electron Paramagnetic Resonance Dosimetry by EPR
A acurácia e precisão exigida nas novas técnicas radioterápicas é bastante elevada, como no caso da Radioterapia com Intensidade Modulada (IMRT). Desta forma, o tamanho dos dosímetros a serem utilizados nas medidas experimentais é um fator crítico. Além disso, a ausência de equilíbrio eletrônico lateral e a existência de intensos gradientes de d
Publicado em: 2010
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3. Desenvolvimento de uma interface grÃfica de usuÃrio para modelos computacionais de exposiÃÃo externa / DEVELOPMENT OF A GRAPHIC USER INTERFACE FOR EXTERNAL EXPOSURE COMPUTATIONAL MODELS
To evaluate the absorbed dose by the patient, in a series of exams, it is necessary to accomplish simulations using an exposure computational model. Such models are fundamentally composed of a virtual representation of the human body (phantom) and a Monte Carlo code. There are several Monte Carlo codes available and also specific voxel phantoms for the two g
Publicado em: 2007
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4. Experimental determination of radiation dose distribution in an heterogeneous medium, irradiated with clinical beams of x and gamma rays. / Estados de impureza em poços quânticos de GaAs-Ga1-xAlxAs
The mass-effective equation is used in order to calculate the intra and inter-subband transition energies in the Quantum Wett structures. The electronic screening of the shallow donor impurity is inclued in the RPR method and the energies are found through variational formalism. The binding energies are calcutated as function of the electronic density and im
Publicado em: 1989
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5. Experimental determination of radiation dose distribution in an heterogeneous medium, irradiated with clinical beams of x and gamma rays / Determinação experimental da distribuição de dose de radiação em meio heterôgenio, irradiado por raios-x e gama radioterápicos
An experimental study of the perturbation caused by a cylindrical inhomogeneity of aluminium on dose distribution in a water phantom, irradiated by high energy photons used in radiation therapy, was performed, employing radiographic film as dosimeter. With these materials we intended to simulate the interface between bone and muscular tissue. The film was pl
Publicado em: 1989