Imaging Technologies and Potential Clinical Applications of Photon-Counting X-Ray Computed Tomography
6.1 Imaging Technologies
We outline the overall strategies, the current status, and our perspective on the imaging technologies that will be necessary to enable photon-counting detector computed tomography (PCD-CT) systems.
6.1.1 Overall Strategy
When an X-ray photon hits a PCD, it generates a pulse. If the PCD detection system is not fast enough, consecutive pulses generated by quasicoincident photons will be integrated and will produce only one count recorded at the wrong energy. This is called pulse pileup. And with the loss of counts, the recorded spectrum will be distorted. One can decrease pulse pileups by making ...