Design of integrated radiation detectors with a-Si photodiodes on ceramic scintillators for use in X-ray computed tomography

Author

Takahashi, Tetsuhiko ; Itoh, Haruo ; Shimada, Toshikazu ; Takeuchi, Hiroshi

Author_Institution

Hitachi Ltd., Tokyo, Japan

Volume

37

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

1478

Lastpage

1482

Abstract

An integrated radiation detector with a-Si photodiodes on ceramic scintillators is designed for use in X-ray computed tomography. The output signal is estimated using Monte Carlo simulation. Results show that this detector has higher sensitivity than a c-Si photodiode/scintillator detector when a transparent layer between the scintillator and the thin film semiconductor is optimized. The noise characteristic is also considered when an integrated detector is coupled with an operational amplifier. Good agreement is shown between predicted and measured parameters

Keywords

Monte Carlo methods; X-ray detection and measurement; amorphous semiconductors; biomedical electronics; ceramics; computerised tomography; elemental semiconductors; photodiodes; scintillation counters; silicon; Monte Carlo simulation; X-ray computed tomography; a-Si photodiodes; ceramic scintillators; integrated radiation detectors; noise characteristic; operational amplifier; output signal; thin film semiconductor; transparent layer; Ceramics; Computed tomography; Optical films; Optical surface waves; Photodiodes; Radiation detectors; Semiconductor device noise; Solid scintillation detectors; Solid state circuits; X-ray detectors;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.57404

Filename

57404