Radiation detector for use in sequential image acquisition

摘要

A radiation detector is provided that provides fast sequential image acquisition. In one embodiment, the radiation detector a diode capacitor that is charged in response to a radiation exposure event. The charge stored in the diode capacitor is transferred to a separate storage capacitor, allowing a new charge to be generated and stored at the diode capacitor.

主权项

1. A radiation detector, comprising:
a plurality of detector elements, each detector element comprising:
a photodiode with an associated diode capacitor, wherein the diode capacitor is charged when the photodiode is exposed to light;a storage capacitor;a transfer gate configured to control a flow of charge between the diode capacitor and the storage capacitor after exposure of the radiation detector to X-rays at a first energy spectrum, wherein a first lead applies a first voltage to the transfer gate during operation of the radiation detector; anda matrix switch transistor configured to control readout of the storage capacitor after exposure of the detector to X-rays at a second energy spectrum different from the first energy spectrum, wherein a respective scan line and a respective data line in combination apply respective second and third voltages to selectively activate the respective matrix switch transistor to allow separate readouts of the storage capacitor corresponding to the first energy spectrum and the second energy spectrum respectively during operation of the radiation detector.