The invention relates to an imaging system for imaging an object (4), said
imaging system comprising a detection unit (3) for consecutively
acquiring projection data sets (P.sub.i) of the object (4), said
detection unit (3) having a temporal response function that is
characterized by at least a time constant (.tau.), a rotation unit that,
while the projection data sets (P.sub.i) are being acquired, moves the
detection unit (3) around the object (4) with an essentially constant
angular velocity (.omega.), a reconstruction unit (9) for computing an
image data set (13) of the object (4) from the projection data sets
(P.sub.i), and a filter unit (10) that, in an active state, applies a
filter (f) on the image data set (13) to compute a correction, which
filter acts as a derivative on the perturbed image, essentially in a
direction corresponding to the direction of the angular velocity, is
essentially proportional to the time constant (.tau.) and is essentially
proportional to the angular velocity (.omega.), said filter unit (10)
being arranged to subtract the correction from the image data set (13).