The B-SCAN whole body scanner, model BS-16HR-DV, from a prison in Costa Rica, uses low-dose x-rays with a voltage of up to 160 kV and a current ranging between 4 mA and 10 mA. During a 5-second scanning session, an individual receives a dose of 0.0382 μSv, which is comparable to dental or bone densitometry studies.
In comparative terms, it is estimated that the general public would need approximately 26,182 exposures to reach the maximum allowable dose of 1 mSv per year. On the other hand, the operational personnel (OP) who operate the scanner receive a dose of 0.00022 mSv annually, well below the annual limit of 20 mSv established by legislation.
The risk analysis addressed various initiating events, categorizing them into Opening and Operation.
The risk assessment considered the frequency of events, the probability of barrier failure and the magnitude of the consequences. An algorithm was used to determine the global risk (R = f * P * C), assigning qualitative levels (High, Medium, Low and Very Low) to the independent variables.
Additionally, a map was developed that represents the distribution of the radiation field and the secondary scattering generated by the scanner. This map offered a graphic  visualization of radiation in the environment, helping to identify critical areas and areas of greater concentration or dispersion of radiation.
In conclusion, the risk matrix indicates that, considering the operational characteristics of the equipment and the doses administered, the general risk is classified as low. Selective use of the scanner, assignment of additional dosimeters to scanned personnel, and compliance with ALARA principles are recommended. The visual distribution map of the radiation field and secondary scattering strengthened the comprehensive understanding of radiation safety associated with the scanner.