Multiple-power multiple-dosage accelerators, rapid examination systems and rapid examination methods thereof

A method for inspecting different areas using a multi-power multi-dosage accelerator comprising an electron gun and an accelerating tube, the method comprising:

• providing, by the electron gun, a first voltage of the electron gun and a second voltage of the electron gun;
• generating, by the accelerating tube, a first X-ray having a first dosage and first power according to the first voltage of the electron gun, and generating a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage;
• inspecting a first area where a person is located using the first X-ray, and
• inspecting a second area where goods are located using the second X-ray.

A ray detection system, comprising:

• a multi-power multi-dosage accelerator, including:
• an electron gun configured to provide a first voltage of the electron gun and a second voltage of the electron gun, and
• an accelerating tube configured to generate a first X-ray having a first dosage and first power according to the first voltage of the electron gun and generate a second X-ray having a second dosage and second power according to the second voltage of the electron gun, wherein the first dosage is a dosage which can be accepted by human bodies and is much less than the second dosage, the first X-ray is used for inspecting a first area where a person is located, and the second X-ray is used for inspecting a second area where goods are located;
• a detector configured to receive an X-ray emitted from the accelerator and transmitted through or scattered by a object to be inspected and convert the X-ray into an output signal;
• and
• a data acquisition and imaging module configured to receive the output signal from the detector, obtain partial scanned images of the first area and the second area of the object according to the output signal, and combine the obtained partial scanned images into a complete scanned image of the object.