Patent ID: 7486762

Claim:
A method for producing CT images of a partially cyclically moving examination object, comprising: scanning the examination object in one pass by a spiral movement of at least one focus and at least one detector oppositely situated; performing the scanning of the examination region at a relative feed rate between gantry and couch; determining a three-dimensional image of absorption coefficients with the aid of a multiplicity of sectional planes of an examination volume on the basis of the data obtained by scanning; determining at least one static object area and at least one at least partially moving object area with reference to the examination object with the aid of cyclical intrinsic movement, with a detection of the cyclical intrinsic movement of a subarea of the examination object performed in a current scanning area by comparing an intensity measurement of at least one pair of time-offset rays on a common ray axis, and with the determining performed during the scanning; and using, during a pass when scanning the examination object, a relatively low feed rate upon the determining of the at least one at least partially moving object area, and using a relatively higher feed rate upon the determining of the at least one static object area.