Some units have the capability to operate in either a “low dose” mode (160 kVp, 0.1 mA)
or “medium dose” mode (160 kVp, 0.3 mA). The mode used depends on the dimensions
of the subject and the nature of the items being searched for. The duration of the
exposure is in the range 5 to 15 seconds, depending on the model of unit.