1. An inspection system for determining the elemental makeup of contents of an article comprising: a localizer for identifying at least one region of interest of the article from data representative of contents of the article, the at least one region of interest having a cross-sectional area or a volume that is less than the entire cross-sectional area or the entire volume of the article; an associated particle imaging device that produces an output that is indicative of the elemental makeup of contents of the article; a data selector for selecting a portion of the output of the associated particle imaging device that corresponds to respective identified regions of interest; and an analyzer for analyzing the portions of the output of the associated particle imaging device selected by the data selector, to the exclusion of other portions of the output, to determine the elemental makeup of contents of the article in each identified region of interest.