DIRECT CONVERSION PHOTON COUNTING DETECTOR

摘要

The present invention discloses a pixilated direct conversion photon counting detector with a direct conversion material layer and a pixilated electrode. Individual electrode pixels are segmented into three segments (510, 520, 530), wherein one of the segments (520) is operated at a more electrically repellant value than that of the other two (510, 530). Said other two segments are connected to electric circuitry (610, 611, 620, 630) that is arranged to generate signals which are indicative of a count of electrons or holes that approach each of the respective electrode pixel segments and to subtract the generated signals from each other.

主权项

1. A direct conversion photon counting detector, comprising a detector cathode, a detector anode and a direct conversion material layer positioned between said detector cathode and said detector anode, said detector anode and/or detector cathode comprising a plurality of electrode pixels that are adapted to detect a presence of electrons or holes,
wherein at least one of the electrode pixels is segmented into at least a first electrode pixel segment, a second electrode pixel segment and a third electrode pixel segment; wherein an electrical potential of the third electrode pixel segment is at a more electrically repellant value than an electrical potential of the first electrode pixel segment and than an electrical potential of the second electrode pixel segment; wherein the detector further comprises electronic circuitry electrically coupled to the first electrode segment and to the second electrode segment to generate a first electrical signal and a second electrical signal respectively, said electronic circuitry comprising a signal subtractor configured to subtract the second electrical signal from the first electrical signal.