| 摘要 |
An x-ray generator for use in an x-ray imaging apparatus, said generator comprising: a plurality of electron field emitters 10; target material 20 arranged to emit x-ray photons when electrons are incident upon it; a plurality of energisable solenoid coils 40; and an electronic power and timing circuit 60 configured to selectively provide electrical current to each individual solenoid coil; whereby, each individual solenoid coil is configured such that when energised, a magnetic field is created causing the path of electrons emitted from the emitter closest to the individual energised solenoid coil to be defocused and/or deflected before the electrons reach the target material. |
