Fig. 10From: What scans we will read: imaging instrumentation trends in clinical oncologyConventional energy integrating (EI) detectors convert the X-rays into an electric signal indirectly (left). Future photon counting (PC) detectors convert each X-ray photon into an electric peak directly (right). The peak of the PC detector is short enough in time to permit counting single photons. The peak height gives information about their energy. To minimize pile up the PC detector pixels are much smaller than the EI pixelsBack to article page