Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/4286
Título: | CMOS X-ray imager for dental radiography |
Autor(es): | Ramos, N. F. Rocha, J. G. Lanceros-Méndez, S. Wolffenbuttel, R. F. Correia, J. H. |
Palavras-chave: | X-ray Digital radiology Scintillator Etching |
Data: | Set-2003 |
Editora: | Universidade do Minho |
Citação: | EUROSENSORS, 17, Guimarães, 2003 - "Eurosensors : Proceedings of the European Conference on Solid-State Transducers". [Guimarães]: Universidade do Minho, 2003. ISBN 972-98603-1-9. p. 208-209. |
Resumo(s): | This paper describes a 64 pixels X-ray imager architecture and fabrication process. The imager is composed by a 8×8 photodiodes array, fabricated in CMOS process, and an array of wells £lled with scintillating crystals. A thick-£lm of aluminum is etched in order to achieve square wells with 500 um depth. The wells are filled with CsI:Tl scintillating crystals and placed above the photodiodes. The scintillating crystals convert the X-ray energy into visible light, which is guided into the photodiodes by the re¤ective aluminum walls, avoiding crosstalk between adjacent detectors. Usually, the spatial resolution of the scintillating x-rays detectors is identical to the scintillators thickness. By using the light guides, the scintillator thickness can be adjusted in order to achieve optimal absorption ef£ciency, since the spatial resolution is established by the pixel size (200 um side). |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/4286 |
ISBN: | 972-98603-1-9 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | DEI - Artigos em atas de congressos internacionais |