Inspection system and method

An inspection system for an aviation pallet cargo, comprising:

• a carrying device configured to carry an aviation pallet cargo to be inspected in an inspection region of the inspection system;
• at least one ray source configured to emit X-rays, wherein each ray source comprises a separate housing to define a vacuum space and comprises a plurality of target spots enclosed within the housing;
• and
• a detector assembly configured to receive X-rays emitted from the at least one ray source and passing through the inspection region,
• wherein the at least one ray source and the detector assembly are lifted or lowered along a central axis of the carrying device relative to the carrying device, and when viewed along the central axis, the at least one ray source is translatable between a plurality of scanning positions relative to the carrying device,
• wherein the inspection system is configured such that:
• when the at least one ray source is located at one of the plurality of scanning positions relative to the carrying device, the at least one ray source and the detector assembly are lifted or lowered along the central axis relative to the carrying device, and the at least one ray source emits X-rays, and when the at least one ray source and the detector assembly are lifted or lowered a predetermined distance relative to the carrying device, the at least one ray source translates to another one of the plurality of scanning positions relative to the carrying device.