METHOD AND ARRANGEMENT RELATING TO X-RAY IMAGING

摘要

The present invention relates to an X-ray apparatus (100) for acquisition of images containing spectral information. The apparatus comprises: an X-ray source (110), a multi-slit collimator (120), a set of line detectors (150), each of said line detectors being a linear array of photon counting channels (210), each of said channels comprising a photon conversion channel element being operatively arranged to convert each photon to an electric pulse, a plurality of pulse counters (230). The counters (230) are operatively arranged to count said pulses in a plurality of different ranges of pulse strength, said pulse having a strength depending on the energy of said photon, and that said apparatus further comprises an arrangement for energy subtracting operation.