| 摘要 |
A method and system for detecting a concealed foreign object carried by a body (P) by collecting radiation (R) from the body (P) indicative of a radiation response of the body (P) to environmental temperature changes which the body (P) is subjected to while entering or emerging from a transient inducing space (TIS) of environmental temperature changes and generating thermal data indicative of the response. The TIS has a volume substantially large relative to that of the body (P) and is configured to enable concentration of a temperature field within the TIS. The TIS may be defined by a gate (21) having at least one of the following configurations: side walls ( 21 A, 21 B) at opposite sides of the body path or side walls ( 21 A, 21 B) at opposite sides of the body path and an upper wall ( 21 C) above the body path. The gate may be a substantially -shaped gate, -shaped gate, or a carousel gate.
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