Abstract: [Object] To achieve a radiation detector capable of suppressing variation in the amount of radiation detected. [Solution] A first gate electrode (52) is connected to a light receiving device, and a second gate electrode (53) is configured to have the same potential as that of the first gate electrode (52).

Abstract: The circuit area of an amplifier provided in a photon-counting radiation detector is decreased compared with the related art. A pulse amplification measurement circuit includes: an inverting amplification circuit that inverts and amplifies an input signal to generate an inverted amplified output; a feedback transistor that connects an input unit and an output unit of the inverting amplification circuit to each other; and a pulse measurement circuit that generates an output signal corresponding to the number of pulses of the inverted amplified output. The pulse measurement circuit is capable of supplying the output signal toward the feedback transistor.

Abstract: [Object] To achieve a high-sensitivity radiation detector. [Solution] An amplifying transistor (3) is configured such that a photodiode (1) receives light with the amplifying transistor (3) conductive.

Abstract: An imaging system includes an input voltage setting unit that applies an input voltage to an Amp transistor, a setting output value acquisition unit that acquires a corresponding output for each pixel, and a calibration characteristic deriving unit that derives an input-output characteristic indicating a correspondence relationship between the input voltage and the output and derives a calibration characteristic to be used for calibration based on an inverse characteristic of the input-output characteristic.

Abstract: The circuit area of an amplifier provided in a photon-counting radiation detector is decreased compared with the related art. A pulse amplification measurement circuit includes: an inverting amplification circuit that inverts and amplifies an input signal to generate an inverted amplified output; a feedback transistor that connects an input unit and an output unit of the inverting amplification circuit to each other; and a pulse measurement circuit that generates an output signal corresponding to the number of pulses of the inverted amplified output. The pulse measurement circuit is capable of supplying the output signal toward the feedback transistor.

Abstract: [Object] To achieve a radiation detector capable of suppressing variation in the amount of radiation detected. [Solution] A first gate electrode (52) is connected to a light receiving device, and a second gate electrode (53) is configured to have the same potential as that of the first gate electrode (52).

Abstract: [Object] To achieve a high-sensitivity radiation detector. [Solution] An amplifying transistor (3) is configured such that a photodiode (1) receives light with the amplifying transistor (3) conductive.

Abstract: An imaging system includes an input voltage setting unit that applies an input voltage to an Amp transistor, a setting output value acquisition unit that acquires a corresponding output for each pixel, and a calibration characteristic deriving unit that derives an input-output characteristic indicating a correspondence relationship between the input voltage and the output and derives a calibration characteristic to be used for calibration based on an inverse characteristic of the input-output characteristic.