1. An imaging method comprising: defining mark positions for one or more detector heads at one or more marked angular orientations to define a zoom area on each detector head, the mark positions for at least one marked angular orientation including a tangential offset of at least one detector head; rotating the one or more detector heads around a subject following a conformal trajectory; during the rotating, tangentially shifting the zoom area on each of the one or more detector heads and acquiring imaging data using the zoom area of each of the one or more detector heads; and reconstructing the imaging data from the tangentially shifted zoom areas into a reconstructed image.