Photon counting detector pixel having an anode including two or more alternatively selectable and separate sub-anodes

摘要

An imaging system (100) includes a radiation source (112) that emits radiation that traverses an examination region and a detector array (114) with a plurality of photon counting detector pixels (116) that detect radiation traversing the examination region and respectfully generate a signal indicative of the detected radiation. The photon counting detector pixel includes a direct conversion layer (122) having a first radiation receiving side (202) and second opposing side (206), a cathode (118) affixed to and covering all of or a substantial portion of the first side, an anode (120) affixed to a centrally located region (208) of the second side, wherein the anode includes at least two sub-anodes (120, 120i, 1202, 120N), and a metallization (124) affixed to the second side, surrounding the anode and the anode region, with a gap between the anode and the metallization. The system further includes a reconstructor (144) that reconstructs the signal to generate volumetric image data indicative of the examination region.

主权项

1. An imaging system, comprising:
a radiation source that emits x-ray radiation that traverses an examination region; a detector array with a plurality of photon counting detector pixels that detect x-ray radiation traversing the examination region and respectively generate a signal indicative of the detected x-ray radiation, a photon counting detector pixel, comprising:
a direct conversion layer having a first radiation receiving side and second opposing side;a cathode affixed to and covering all of or a substantial portion of the first side;an anode affixed to a centrally located region of the second side, wherein the anode includes at least two sub-anodes; anda metallization affixed to the second side, surrounding the anode with a gap between the anode and the metallization; a substrate having at least two bonding pads, one for each of the at least two sub-anodes, wherein each of the at least two bonding pads is physically and electrically coupled to a different one of the at least two sub-anodes; processing electronics; switching electronics configured to alternatively electrically couple only a single one of the at least two bonding pads to the processing electronics; and a reconstructor that reconstructs the signal to generate volumetric image data indicative of the examination region.