A multi-stage process utilizing one or more radiation sensors on a distributed network for the detection and identification of radiation, explosives, and special materials within a shipping container. The sensors are configured as nodes on the network. The system collects radiation data from one or more...http://www.google.com.tw/patents/US7760103?utm_source=gb-gplus-share專利 US7760103 - Multi-stage system for verification of container contents
