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TitleX-Ray image detector based on light guides and scintillators
Author(s)Rocha, J. G.
Dias, R. A.
Gonçalves, L. M.
Minas, Graça
Ferreira, A.
Costa, Carlos M.
Lanceros-Méndez, S.
Scintillation detectors
X-ray detectors
X-ray image sensors
Issue dateSep-2009
JournalIEEE Sensors Journal
Abstract(s)This paper reports on a study concerning the design of an X-ray detector that is suitable to analyze a small area with high spatial resolution. The indirect method of X-ray detection is used, i.e., the X-rays are first converted into visible light, which is then detected. In this design, an array of CsI:Tl scintillators, encapsulated by aluminum walls, is coupled with an array of CMOS photodetectors. This structure, patented and described theoretically by the authors in previous works, can be obtained using the SU-8 negative photoresist as a sacrificial layer. The experimental work consisted in the deposition of a scintillator layer, and an aluminum layer on the active area of a commercially available digital imaging sensor, thus supporting the developed detector design. X-ray imaging tests were performed using the PHILIPS X’Pert equipment. Promising results were obtained, featuring high resolution and detail.
Publisher version
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em livros de atas/Papers in proceedings
DEI - Artigos em revistas internacionais

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