Preliminary study on an imaging system with a two-dimensional photodetector and a thermoluminescent plate

Author

Takahashi, Hiroyulii ; Fukuda, Daiji ; Kurahashi, Tomohiko ; Iguchi, Tetsuo ; Nakazawa, Masaharu

Author_Institution

Dept. of Quantum Eng. & Syst. Sci., Tokyo Univ., Japan

Volume

3

fYear

1995

Firstpage

1647

Abstract

Currently, two dimensional photodetectors such as cooled CCDs are available. Although they suffer from their small sizes, they can take an optical image within a short time. To overcome the size restriction, we plan to use a memory-effect as is used in FCR. Multiple TL (thermoluminescence) plates are used to take a radiation image, and afterwards the TL plates are heated to obtain a visible light image. This configuration will realize both a fast time response and a large sensitive area. After a series of experiments, we have obtained TL images using a cooled CCD with ZnS, CsI, Gd₂O₂S phosphors at low temperatures down to liquid nitrogen temperature. These first results were encouraging ones both for the response time and the image quality

Keywords

CCD image sensors; X-ray detection; X-ray imaging; diagnostic radiography; phosphors; photodetectors; thermoluminescence; 100 kV; 100 kV X-rays; CsI; Gd₂O₂S; ZnS; cooled CCD; fast time response; image quality; imaging system; large sensitive area; liquid N₂ temperature; low temperatures; memory-effect; multiple TL plates; optical image; phosphors; radiography; size restriction; small sizes; thermoluminescent plate; two-dimensional photodetector; visible light image; Charge coupled devices; Delay; Nitrogen; Optical imaging; Optical sensors; Phosphors; Photodetectors; Temperature sensors; Time factors; Zinc compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE

Conference_Location

San Francisco, CA

Print_ISBN

0-7803-3180-X

Type

conf

DOI

10.1109/NSSMIC.1995.500385

Filename

500385