Abstract: Embodiments of the present invention provide a detector comprising at least one detector element, the at least one detector element comprising: a photodiode element operable to generate charge carriers, the detector being configured to generate a signal indicative of a cumulative amount of charge carriers generated by the photodiode element during the integration period; a reset switch element configured to couple the photodiode element to a reset potential; at least one charge storage reservoir; and at least one gain control switch element configured to couple at least one said at least one charge storage reservoir to the photodiode element, wherein the detector is configured to perform a reset operation in which the reset switch element and at least one said at least one gain control switch element are closed in order to couple at least one said at least one charge storage reservoir and the photodiode element to the reset potential, the detector being configured to open at least one gain control switch elem

Abstract: Embodiments of the invention provide a radiation detector comprising a pixel element, the pixel element comprising: a first diode element having a node capacitance associated therewith, the element being operable to pass electrical charge therethrough between terminals thereof in response to incident radiation; and an auxiliary charge storage reservoir, wherein the detector is operable by means of charge transfer between the auxiliary charge storage reservoir and a first terminal of the first diode element to reduce a rate at which an electrical potential VX of the first terminal changes in response to a cumulative amount of incident radiation.