X-ray detecting device and operating method thereof

摘要

An X-ray detecting device includes: an X-ray receiving panel including a plurality of scan lines, a plurality of data lines, and a plurality of photodetecting pixels connected to the scan lines and the data lines; a scan driver, connected to the scan lines, for applying a scan signal for controlling outputs of data signals of the photodetecting pixels; and a data detector, connected to the data lines, for receiving the data signals output by the photodetecting pixels, reading the data signals, and controlling capacitance according to transmissivity of a subject. Detective quantum efficiency of the X-ray detecting device can be improved by adaptively controlling capacitance of an integrator according to measured transmissivity of a subject.

主权项

1. An X-ray detecting device having a pre-exposure interval followed by a capacitance control interval followed by a main exposure interval, wherein an X-ray irradiation amount in the pre-exposure interval is less than an X-ray irradiation amount in the main exposure interval, the X-ray detecting device comprising:
an X-ray receiving panel including a plurality of scan lines, a plurality of data lines, and a plurality of photodetecting pixels connected to the scan lines and the data lines; a scan driver, connected to the scan lines, for applying a corresponding scan signal to each of the scan lines for controlling outputs of data signals of the photodetecting pixels when scanning a subject; and a data detector utilizing an integrator connected to the data lines for receiving, during the pre-exposure interval, the data signals output by the photodetecting pixels and reading the data signals, then, during the capacitance control interval calculating transmissivity of the subject based on the read data signals and controlling capacitance of the integrator according to the calculated transmissivity of the subject, and then, during the main exposure interval, again receiving the data signals output by the photodetecting pixels to generate a main output signal.