Apparatuses and methods for generating distributed x-rays in a scanning manner

An apparatus to generate distributed x-rays, the apparatus comprising:

• an electron gun configured to generate electron beam currents;
• a vacuum box downstream of the electron gun and coupled with the electron gun;
• a scanning device configured to generate a scanning magnetic field to deflect the electron beam currents;
• a current-limiting device arranged in the vacuum box and having a plurality of regularly-arranged holes, wherein when the electron beam currents scan through the current-limiting device under the control of the scanning device, electron beams corresponding to positions of the holes in the scanning order are outputted from the current-limiting device;
• and
• an anode target arranged in the vacuum box and downstream of the current-limiting device, wherein by applying a voltage to the anode target, an electric field is formed between the current-limiting device and the anode target to accelerate the electron beams from the current-limiting device, and wherein the accelerated electron beams bombard the anode target to generate x-rays.

A method of generating distributed x-rays, the method comprising:

• controlling an electron gun to generate electron beam currents, wherein a vacuum box is downstream of the electron gun and coupled with the electron gun;
• controlling a scanning device to generate a scanning magnetic field to deflect the electron beam currents, the electron beam currents scanning through a plurality of holes regularly arranged on a current-limiting device under the control of the scanning device to output electron beams corresponding to positions of the holes in the scanning order, wherein the current-limiting device is arranged in the vacuum box;
• and
• generating an electric field between the current-limiting device and the anode target to accelerate the electron beams from the current-limiting device by applying a voltage to the anode target, the accelerated electron beams bombarding an anode target to generate x-rays, wherein the anode target is arranged in the vacuum box and is located downstream of the current-limiting device.