1. A computer tomography apparatus ( 200 ) for examination of an object of interest ( 207 ), the computer tomography apparatus ( 200 ) comprising detecting elements ( 223 ) adapted to detect, as detecting signals, electromagnetic radiation scattered from an object of interest ( 207 ) in an energy-resolving manner; a combination unit ( 225 ) adapted to combine detecting signals detected by different detecting elements ( 223 ) thereby reducing the amount of data to be processed for determining structural information concerning the object of interest ( 207 ).