Title :
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
Abstract :
A novel X-ray radiography system has been developed using multiple amorphous silicon linear sensors combined with Gd2O2 S 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;
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
DOI :
10.1109/NSSMIC.1992.301530
