This is a truck monitor built to perform gamma spectroscopy and neutron detection at US ports.  This device would be spectacular at assessing the radiological contents of large packages such as SEALANT containers, roll off containers, B25 boxes, intermodals, etc.

It is composed of 4 ea 4X4X16″ NaI detectors (the same ones used for whole body counting) mounted in a steel frame with gamma spectroscopy software and a place for He-3 detectors if you want to utilize the neutron measurement portion.