Patent ID: 7792347

Claim:
A method of selecting projection data from a projection data set of a moving object of interest for artifact reduction in reconstructed image data, the method comprising the steps of: selecting with a processor a first phase point and a second phase point of a movement of the object of interest; determining with a processor a first width of a first gating window and a second width of a second gating window on the basis of a motion model of the object of interest; wherein the first gating window corresponds to the first phase point and the second gating window corresponds to the second phase point; wherein the first width of the first gating window is determined on the basis of a first duration of a first stable cardiac phase corresponding to the first phase point and the second width of the second gating window is determined on the basis of a second duration of a second stable cardiac phase corresponding to the second phase point; and wherein the first and second durations are determined on the basis of an evaluation of a similarity between a first and a second cardiac cycle.