• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.59.2020.tde-07102019-123534
Document
Author
Full name
Beatriz Tomazi
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2019
Supervisor
Committee
Poletti, Martin Eduardo (President)
Cunha, Diego Merigue da
Hönnicke, Marcelo Gonçalves
Nicolucci, Patrícia
Title in Portuguese
Protótipo experimental para aquisição de imagens por espalhamento de raios X
Keywords in Portuguese
Contraste e CNR
Espalhamento
Imagens por espalhamento de raios X
Abstract in Portuguese
Recentes pesquisas mostram que a componente espalhada por um objeto pode ser utilizada para formar imagens médicas, complementares às imagens convencionais. O objetivo geral deste trabalho é avaliar a técnica da formação de imagem por espalhamento de raios X por meio da análise do contraste e razão contraste ruído (contrast noise ratio, CNR) entre materiais, utilizando um detector de radiografia computadorizada e espectros de raios X clínicos. Os resultados analíticos mostraram significantes variações nos perfis radiais da imagem causadas pelos borramentos angular e espectral, apresentando grandes distorções de acordo com a variação do espectro incidente de raios X, mostrando uma forte dependência com a largura espectral, energia média do feixe e forma do espectro de raios X. Os resultados experimentais de contraste e CNR se mostraram superiores na maior parte ao longo do raio do detector comparado ao primário, apresentando regiões ótimas de integração
Title in English
Experimental prototype for image acquisition by X-ray scattering
Keywords in English
Contrast and CNR
Scattering
X-ray scattering images
Abstract in English
Recent research shows that the scattered component of an object can be used to form medical images, complementary to conventional images. The general objective of this work is to evaluate the technique of X-ray scattering imaging by contrast analysis and contrast noise ratio (CNR) between materials using a computerized radiography detector and clinical X-ray spectra. . The analytical results showed significant variations in radial image profiles caused by angular and spectral blurring, showing large distortions according to the incident X-ray spectrum variation, showing a strong dependence on spectral width, average beam energy and spectrum shape. X-ray results. Experimental contrast and CNR results were superior for most of the detector radius compared to primary, showing optimal integration regions
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2020-01-14
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2020. All rights reserved.