System and method for reducing effects of rotational motion

A computer implemented method for reducing the effects on image quality of rotational motion of an object during image acquisition, the method comprising:

• receiving a point source data associated with a fiducial associated with the object, the point source data being acquired from at least a first projection data (S1) acquired at a first time T1 from a first viewing angle θ1 resulting in a first projected distance r1 and a second projection data (S2) acquired at a second time T2 from a second viewing angle θ2 resulting in a second projected distance r2;
• computing a point source location based, at least in part, on the point source data;
• computing a predicted sine wave data based, at least in part, on at least one of the point source location and the point source data;
• receiving an observed image data comprising:
• one or more projection data of a radial k-space associated with the object;
• and
• an observed waveform data related to a location of the fiducial associated with the object and further associated with the predicted sine wave data;
• comparing the predicted sine wave data and the observed waveform data;
• and
• selectively processing the observed image data to reduce the effects of rotational motion of the object based, at least in part, on the comparison of the predicted sine wave data and the observed waveform data;
• where computing the point source location comprises:
• determining Rres, where Rres is the displacement component of a polar coordinate for the point source;
• and
• determining θres, where θres is the angular component of the polar coordinate for the point source.