What must a radiographer announce before performing an exposure if conducting mobile radiography?

In the context of mobile radiography, it is essential for the radiographer to announce that an exposure is about to be made. This announcement serves several critical purposes. First, it informs all personnel in the vicinity that an exposure, which involves radiation, is imminent. This is crucial for ensuring everyone's safety, as it allows them to take necessary precautions, such as stepping out of the room or covering themselves with protective gear.

Moreover, this announcement is a part of the protocol aimed at minimizing unnecessary radiation exposure to staff and bystanders. By clearly stating that an exposure is about to take place, the radiographer ensures everyone is alerted and can respond appropriately, which is vital in maintaining a safe working environment in clinical settings.

While announcing that the machine is ready, the patient is positioned correctly, or that all personnel should prepare may contribute to workflow efficiency or readiness, they do not encompass the primary focus of safety compliance regarding radiation exposure, which is why the announcement before making an exposure is the most critical action.