An imaging device (6) for scan-imaging radiation includes an imaging cell array (3) comprising an array of detector cells generating charge in response to incident radiation (1) and an array of pixel circuits each pixel circuit associated with a respective detector cell. The pixel circuit includes circuitry for accumulating plural radiation hit on an associated detector cell and transfer circuitry shifting upon command the accumulated value of all pixels by one step in one dimension (e.g., row by row). The imaged object (2) moves at a speed VOPT (7) with respect to the radiation source and the imaging detector (or source and detector move at −VOPT with respect to the object) on which the accumulated values are shifted are with VTDI (8). VTDI may equal VOPT in value and direction. Thus, a value is accumulated in a moving information package using multiple pixels (10) and referring directly to a location on the moving object. The accumulated values are read out along one edge of the pixel array. An image is reconstructed in (4) and displayed in (5).