| 摘要 |
An x-ray generator is provided, comprising a plurality of electron field emitters (10); a target material (20); a plurality of energisable solenoid coils (40); and an electronic power and timing circuit. The generator is able to provide electrical current to at least one individual solenoid coil to create a magnetic field to cause the path (100) of electrons emitted from the emitter closest to the energised solenoid coil to be defocused and/or deflected before the electrons reach the target material; and wherein the target material comprises a low atomic number material and a high atomic number material, the high atomic number material being arranged in a regular pattern, such that, in use, the electrons may be aimed at either the high or the low atomic number material. |
