1. A method for imaging an object with a scanning imaging system having a rotating gantry, a multislice detector array on the rotating gantry having parallel rows of detector elements, the parallel rows defining an x-direction, and an x-ray source on the rotating gantry configured to emit a fan-shaped x-ray beam in an x-y plane through an object to be imaged and towards the multislice detector array, the multislice detector array and the fan-shaped beam together defining an first iso-channel of the multislice detector array when the scanning imaging system is utilized for scanning without ganging groups of detector elements, said method comprising: ganging groups of adjacent detector elements in the x-direction; scanning an object with the scanning imaging system using the ganged groups of adjacent detector elements to acquire projection data; and reconstructing an image of the object utilizing the acquired projection data and an adjusted iso-channel of the multislice detector array different from the first iso-channel.