Patent ID: 8396275

Claim:
A method for creating tomographic recordings with the aid of an x-ray CT systems, which uses two emitter/detector arrangements operating with an angular offset on a gantry to scan an examination object simultaneously with at least two different x-ray energy spectra in a spiral or circular manner, the method comprising: reconstructing a first recording from combined detector data of a scan of a first of the two emitter/detector arrangements over a quarter rotation with a first x-ray energy spectrum and detector data of a scan of a second of the two emitter/detector arrangement over a complementary quarter rotation with a second x-ray energy spectrum; creating at least one second recording from detector data of a scan of at least one of the two emitter/detector arrangements over at least a half rotation; subjecting the first recording to high-pass filtering in respect of its spatial frequencies and subjecting the at least one second recording to low-pass filtering in respect of its spatial frequencies; and combining the filtered first and at least one second recording to produce a resulting recording.