Dark signal consideration in spatial resolution for scintillator coupled CMOS sensor

Author

Kim, Kwang Hyun ; Kim, Yong-Kyun ; Lee, Seung Jin ; Cho, Gyuseong ; Kim, Young Soo ; Chae, Jeon Sung

Author_Institution

Korea Atomic Energy Res. Inst., South Korea

Volume

3

fYear

2004

fDate

16-22 Oct. 2004

Firstpage

1644

Abstract

The spatial resolution of scintillator coupled CMOS sensor has been investigated for the conditions of the digital radiography by using unified MTF. The scintillator was FOP CsI with high resolution and the CMOS sensor has a pixel pitch of 48 mum. The effects of initial dark signal of the sensor on the unified MTF were newly modeled considering different radiography conditions. This model showed well the contribution of the dark signal on the degradation of the spatial resolution, and it compared to the measured spatial resolution.

Keywords

CMOS integrated circuits; radiography; semiconductor counters; solid scintillation detectors; 48 mum; FOP CsI; dark signal; digital radiography; pixel pitch; scintillator coupled CMOS sensor; spatial resolution; unified modulation transfer function; Image resolution; Radiography; Semiconductor device modeling; Sensor arrays; Sensor systems; Signal resolution; Solid scintillation detectors; Spatial resolution; Telephony; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2004 IEEE

Conference_Location

Rome

ISSN

1082-3654

Print_ISBN

0-7803-8700-7

Electronic_ISBN

1082-3654

Type

conf

DOI

10.1109/NSSMIC.2004.1462555

Filename

1462555