It's not economical to have a person walk up to every package with an XRF gun, but it feels like it ought to be possible to do this in bulk. Maybe use high inte

It's not economical to have a person walk up to every package with an XRF gun, but it feels like it ought to be possible to do this in bulk. Maybe use high intensity XRay to quickly capture an overview image / tomograph of each container and then follow up with lower intensity on areas of interest to tease out the spectrum. Is the best way to capture X-Ray spectra still to choke down intensity to the single-photon regime, watch the size of each scintillation event in the detector, and assemble a histogram? In any case, the best way can't be worse than the old way, and the old way is probably viable as a second automatic step in a two step process. Come to think of it, airport luggage inspection happens at high throughput. Surely they could scale that up from suitcases to containers? Of course, "physically possible" doesn't mean "politically possible given the budgets involved" which in turn doesn't mean "has actually happened." I'm mostly fishing here to see if anybody knows things about high-throughput X-Ray screening.