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

Abstract

An imaging system () includes a radiation source () that emits radiation that traverses an examination region and a detector array () with a plurality of photon counting detector pixels () 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 () 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 (N), and a metallization () 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 () that reconstructs the signal to generate volumetric image data indicative of the examination region.