IMPROVED TARGET COMPOSITION DETERMINATION METHOD AND APPARATUS

摘要

The present invention relates to a target composition determination apparatus, a method of using same and also preferably a method of issuing an alarm indicator. The target composition determination apparatus provided includes an x-ray emission element configured to concurrently transmit x-ray photons with a plurality of different energy levels at a target. Also provided is an x-ray detection element configured to receive x-rays which have interacted with the target and determine the energy levels of each of these received x-rays. Output signals of the detection element are provided to a processing element which employs at least one multivariate calibration to indicate a presence of at least one component material of interest within the scanned target.