1. A method of automatically fusing images, said method comprising: acquiring scan data from a first imaging modality; fusing scan data from a second imaging modality with the scan data from the first modality as the scan data from the second modality is acquired; and displaying reconstructed images of the fused data including dynamically decreasing a region of the reconstructed images corresponding to the scan data from the first modality and dynamically increasing a region of the reconstructed images corresponding to the scan data from the second modality.