A CT
scanner for scanning a subject is provided, the
scanner comprising: a gantry capable of rotating about a scanned subject; at least two cone beam X-
Ray sources displaced from each other mounted on said gantry; at least one 2D
detector array mounted on said gantry, said
detector is capable of receiving
radiation emitted by said at least two X-
Ray sources and attenuated by the subject to be scanned; a first
image processor capable of generating and displaying CT images of a volume within the subject; a second
image processor capable of generating projection X-
Ray images of said volume, wherein the images are responsive to X-Ray separately emitted by each of said at least two cone beam X-Ray sources; and a third
image processor capable of generating and displaying fluoroscopic images composed of said projection X-Ray images, wherein said fluoroscopic images are spatially registered to said CT images.