An X-ray imaging pixel detector based on a scintillating guides screen

Author

Kleimann, P. ; Linnros, J. ; Fröjdh, C. ; Petersson, C.S.

Author_Institution

Dept. of Electron., Kungl. Tekniska Hogskolan, Kista, Sweden

Volume

47

Issue

4

fYear

2000

fDate

8/1/2000 12:00:00 AM

Firstpage

1483

Lastpage

1486

Abstract

We have developed and preliminary tested a new digital X-ray imaging sensor based on a scintillating guide screen. The scintillating guides are used to channel the emitted visible light to the pixel detector. This enables us to avoid the well-known tradeoff between detection efficiency and spatial resolution which is encountered when a non-patterned scintillating layer is used on top of a CCD. A prototype has been fabricated using microtechnologies. The scintillator is CsI:Tl and the low-index cladding material used to channel the light is silicon dioxide. The performance of this prototype has been compared to that of a thick CsI single crystal. The results concerning the spatial resolution are quite promising and demonstrate a proof-of-principle. However, the performance in terms of signal to noise ratio and sensitivity have to be improved. These problems are currently addressed

Keywords

X-ray detection; position sensitive particle detectors; solid scintillation detectors; CsI:Tl; SiO₂; X-ray imaging pixel detector; detection efficiency; scintillating guides screen; sensitivity; signal to noise ratio; spatial resolution; thick CsI single crystal; Charge coupled devices; Crystalline materials; Image sensors; Pixel; Prototypes; Spatial resolution; Testing; X-ray detection; X-ray detectors; X-ray imaging;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.873001

Filename

873001