Method and computed tomography system for generating tomographic image datasets with integrating detector and counting detector

A dual-source CT system, comprising:

• a plurality of detectors simultaneously operable for simultaneous angle-offset scanning of a measurement object from a multiplicity of projection angles, a first of the plurality of detectors being an integrating detector configured to perform integrational radiation measurement, and a second of the plurality of detectors being a counting detector configured to resolve an incident radiation spectrum into at least two energy bins;
• and
• a computer system to evaluate measurement results of elements of the plurality of detectors, said computer system including a memory with computer programs located therein, at least one of the computer programs, when executed, causes the computer system to,
• use projection data of the integrating and the counting detector from a quarter rotation of the gantry jointly, for reconstruction of a first tomographic image dataset,
• use energy-resolved projection data of the counting detector from at least one half rotation of the gantry for reconstruction of at least one second material-selective tomographic image dataset, and
• form at least one tomographic result image dataset by overlaying the reconstructed first tomographic image dataset with the reconstructed second material-selective tomographic image dataset.