Cargo security inspection method based on spiral scanning

摘要

Abstract A cargo security inspection method based on spiral scanning, the method comprising: spirally scanning an inspected object at a first precision to obtain the 5 transmission projection data; judging whether there is a suspect area in the inspected area; scanning at least one slice of said suspect area at a second precision wherein the second precision is greater than the first precision; and, reconstructing a tomographic image of said at least one slice, and using the reconstructed tomographic image to judge whether there is any dangerous article in the suspect area. N Welbourne/Cases/Paten/7 1000-71999/P71974.AU/Specis/P7]974 AU FPME07140011 specification.doc 04/05/07 quickly spirally scanning the 10 1 inspected object at a first precision Is there any suspect area N in the inspected object? tomographic scanning the suspect 103 area at a second precision reconstructing a tomographic 104 image of the suspect area