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Design of pixellated scintillator on PIN-type photodiode for digital mammography

We tested the system resolution of the FOS-CsI (Tl) coupled to CMOS APS for mammography of 28 kV p. Through the results, this detector showed 14 cycle/mm at zero MTF. The reason it was showing lower resolution than was expected was analyzed using the characteristics of scintillator and sensor. The e...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2006-11, Vol.567 (1), p.364-367
Main Authors: Hyun Kim, Kwang, Kang, Dong-Wan, Yuk, Sunwoo
Format: Article
Language:English
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Summary:We tested the system resolution of the FOS-CsI (Tl) coupled to CMOS APS for mammography of 28 kV p. Through the results, this detector showed 14 cycle/mm at zero MTF. The reason it was showing lower resolution than was expected was analyzed using the characteristics of scintillator and sensor. The estimation method of system resolution using the ratio of dark current and photocurrent was derived. The resolution of the candidate detectors and conceptual design of pixellated 2-D sensor array performance were investigated through this method. One of the candidate detectors showed desirable resolution of over 20 cycle/mm.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2006.05.242