A method and apparatus for performing three dimensional (3D) paradoxical pulse bi-planar synchronous real-time imaging. In a 3D imaging scan mode, the bi-planar imaging method and apparatus of the present invention executes a cross angle of two X-ray imaging subsystems with a sweeping angle of the two subsystems to be configured with a mechanical offset of 90 degree plus a half-fan beam angle of the X-ray beam.
