Voxel-based model construction from colored tomographic images / ConstruÃÃo de simuladores baseados em elementos de volume a partir de imagens tomogrÃficas coloridas

AUTOR(ES)
DATA DE PUBLICAÇÃO

2002

RESUMO

This work presents a new approach in the construction of voxel-based phantoms that was implemented to simplify the segmentation process of organs and tissues reducing the time used in this procedure. The segmentation process is performed by painting tomographic images and attributing a different color for each organ or tissue. A voxel-based head and neck phantom was built using this new approach. The way as the data are stored allows an increasing in the performance of the radiation transport code. The program that calculates the radiation transport also works with image files. This capability allows image reconstruction showing isodose areas, under several points of view, increasing the information to the user. Virtual X-ray photographs can also be obtained allowing that studies could be accomplished looking for the radiographic techniques optimization assessing, at the same time, the doses in organs and tissues. The accuracy of the program here presented, called MCvoxEL, that implements this new approach, was tested by comparison to results from two modern and well-supported Monte Carlo codes. Dose conversion factors for parallel X-ray exposure were also calculated

ASSUNTO(S)

simuladores imagens tomogrÃficas engenharia nuclear transporte de radiaÃÃo

ACESSO AO ARTIGO

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