Patent ID: 6870898

Claim:
A computed tomography apparatus comprising: a measurement unit adapted to receive an examination subject, said measurement unit, in a scan of said subject, generating data values for said subject; a control unit connected to said measurement unit for operating said measurement unit during said scan according to a combination of operating parameters; an image computer supplied with said data values for reconstructing an image of said subject from said data values, said image having an image quality; a user-operable input unit connected to said control unit allowing a user to enter a selected combination of said operating parameters for conducting a user-intended scan, said selected combination, if implemented, causing an image with a user-intended image quality to be reconstructed; and said control unit determining whether said selected combination would produce an impermissible operating state of said measurement unit and, if so, said control unit causing at least one of said operating parameters in said selected combination to be altered to a value which permits said user-intended scan to be conducted while avoiding said impermissible operating state and which produces an image of said subject having an image quality which is not significantly reduced in comparison to said user-intended image quality.