1. A method ( 1000 , 1050 ) of determining a center offset distance for computed tomography “CT” imaging in a CT system ( 100 ), the method comprising: providing ( 1002 ) a specimen ( 108 ) on a support ( 104 ) that is positioned between an emission source ( 102 ) for outputting radiation towards the specimen while the specimen rotates with respect to a detector ( 112 ) for receiving radiation that has passed through the specimen; collecting ( 1004 ) projection data ( 1306 ) from emissions received at the detector for a plurality of rotational positions of the specimen relative to the detector; generating ( 1004 ) a sinogram image ( 902 ) based on the projection data; dividing ( 1006 ) the sinogram image into a plurality of image portions ( 902 a , 902 b ); iteratively moving ( 1008 ) the image portions in a superimposed manner relative to each other by a relative offset so that a superimposed image peak ( 924 a , 924 b ) in such superimposed image portions has a maximized height; defining ( 1010 ) a center offset distance for the sinogram image as a relative offset between the superimposed image portions that results in the maximized height, wherein if the center offset distance is zero, the superimposed image portions will be superimposed so that their edges are aligned to result in the maximized height; and reconstructing ( 1014 an image ( 110 ) of the specimen from the sinogram image using the defined center offset distance.