Title :
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
fDate :
6/1/1990 12:00:00 AM
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;
Journal_Title :
Nuclear Science, IEEE Transactions on
