There are multiple ways in which contraband makes its way inside prisons and other correctional facilities.
Person-borne contraband is that which is found hidden on a person, either concealed within or under their clothing or within a body cavity.
Detecting person-borne contraband must be done using capable, yet safe methods to be accurate enough to locate items while also not causing harm to the person or to security personnel.
Full body scanning using advanced x-ray technology is considered the safest and most accurate way to locate person-borne contraband.
What Detection Methods Are Used in Correctional Facilities?
There are two methods in which scanning for person-borne contraband can be performed at a correctional facility: full-body stationary walk-through scanning and handheld wand body scanning.
Both of these devices are available using various technologies such as x-ray, backscatter x-ray, transmission x-ray, ion scanning, millimeter wave, and others that detect different items including cellular devices, metallic and non-metallic items, narcotics, and explosives, each to varying degrees.
The devices also have varying degrees of penetration in three different scanning situations, those being on the body, within a body cavity, and under body armor.
Yet among all of the different walk-through and handheld devices available, as of yet there is no single device that can detect all five categories of contraband in all three locations.
Which Devices Yield the Least Amount of Radiation?
Concerning radiation, the scanners emitting the lowest amount of radiation can detect the fewest types of contraband, while those detecting the most types emit higher radiation.
While all of these devices are considered safe for repeated use, the number of uses considered safe for each device may be higher or lower depending on the amount of radiation emitted.
Handheld devices generally deliver smaller doses of radiation in comparison to walk-through units, but this is not always the case, as exposure may increase based on how the device is used.
Also, the cost of these devices tends to correlate directly with the radiation level and detection ability of each device.
Which Scanning Device Is Right for Your Facility?
Practically speaking, handheld scanners may be more desirable in many cases due to their easy use and affordability, but they are more time-consuming to use.
Conversely, full body scanners are more convenient and thorough, but much more expensive.
When considering the cost of these devices and their different limitations based on the technology and radiation exposure, the sensible solution for any correctional facility is to use a combination of these approaches to detect the most types of person-borne contraband while delivering the least amount of radiation possible.