X-ray explosive imager

摘要

A technique for use in security screening and detection contexts employs an X-ray explosive imager that acquires images from backscattered RF modulated X-ray signals on which a time series analysis is performed to detect image change across the time series of images that represent pixels changing at the rate of the difference frequency of the RF frequency and the a priori NQR signature frequencies.

主权项

1. A method, comprising:
modulating an X-ray signal with a first radio frequency and with a second radio frequency to generate a modulated X-ray signal; transmitting the modulated X-ray signal toward a container that contains an item; detecting modulated X-ray signal backscatter from the item; and processing the modulated X-ray signal backscatter to identify a chemical element in the item based on differences in the modulated X-ray signal backscatter over time that occur at a rate associated with a nuclear quadrupole resonance of the chemical element.