Final answer:
Mobile image intensified fluoroscopy for diagnostic purposes has a strict exposure limit that must not be exceeded to minimize risks, with doses monitored closely in line with the principle of risk versus benefit.
Step-by-step explanation:
The question pertains to the maximum permissible exposure levels during mobile image intensified fluoroscopy which is used for diagnostic purposes. For medical imaging involving radiation, there is always a consideration of risk versus benefit to ensure that the diagnostic gains justify the exposure risks. The permissible dose rates are set based on research and clinical guidelines that consider the likelihood of biological harm.
Diagnostic doses have generally been lowered over time with improvements in technology, and exposure is only deemed acceptable when necessary for diagnosis. In terms of specifics, mobile image intensified fluoroscopy must adhere to tight dose constraints to minimize risks to patients. Considering the information provided, it is important for healthcare providers to understand the correct exposure limits and to implement the use of shielding, fast films, and collimation techniques where applicable, to reduce radiation exposure and to comply with safety standards.