Development of a new X-ray radiography system with 16 amorphous silicon linear sensors

Author

Takahashi, Hiroyuki ; Harada, Kazuhiro ; Nakazawa, Masaharu ; Hasegawa, Ken-ichi ; Mochiki, Kohi-Ichi ; Hayakawa, Yoshinori ; Inada, Tetsuo

Author_Institution

Dept. of Nucl. Eng., Tokyo Univ., Japan

fYear

1992

fDate

25-31 Oct 1992

Firstpage

1336

Abstract

A novel X-ray radiography system has been developed using multiple amorphous silicon linear sensors combined with Gd₂O₂S phosphor sheet. The 16 line sensors are aligned in parallel with a spacing of 19 mm and are scanned in 20 mm to cover an X-ray image. The scanning step is 0.5 mm and the accumulation time can be selected from 33 ms to 200 ms per step. A total active area of 25.6 cm×30.0 cm with 512×608 pixels was realized. The major practical problem of this system is caused by the sensitivity variations of each sensor; it has been overcome by adopting the multilevel intensity calibration method with spatially uniform X-ray irradiation. The availability of this system for X-ray radiography has been demonstrated through some medical applications. This system offers a promising compact X-ray imaging system in place of conventional X-ray films

Keywords

biomedical equipment; diagnostic radiography; 311296 pixel; 33 to 200 ms; 512 pixel; 608 pixel; Gd₂O₂S phosphor sheet; X-ray radiography system; accumulation time; amorphous Si linear sensors; compact X-ray imaging system; line sensors; medical diagnostic imaging; medical instrumentation; sensor sensitivity variations; spatially uniform X-ray irradiation; Amorphous materials; Amorphous silicon; Biomedical equipment; Calibration; Image sensors; Medical services; Phosphors; Radiography; Sensor systems; X-ray imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference, 1992., Conference Record of the 1992 IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0884-0

Type

conf

DOI

10.1109/NSSMIC.1992.301530

Filename

301530