Safety inspection apparatus

A safety inspection apparatus for a human body, comprising:

• an x-ray source, comprising a single ray emission focal spot and configured to emit a sectorial ray beam from the single ray emission focal spot;
• a plurality of detector modules, each of which has a ray receiving surface, and which are arranged along a plurality of straight line segments, wherein:
• the plurality of straight line segments comprise a first straight line segment and two second straight line segments, one end of one of the two second straight line segments is connected to one of two ends of the first straight line segment, one end of the other of the two second straight line segments is connected to the other of the two ends of the first straight line segment, and, the two second straight line segments extend from the two ends of the first straight line segment towards the x-ray source side, respectively;
• an imaging device for acquiring a transmission image of a human body under inspection based on a ray that passes through the human body and is received by the plurality of detector modules;
• wherein in a plane where the sectorial ray beam is located, a normal to the ray receiving surface of each of the detector modules at a midpoint of the ray receiving surface of the each of the detector modules passes generally through the ray emission focal spot of the x-ray source;
• and
• wherein a direction in which the first straight line segment extends is a vertical direction.