What signal indicates that the radiographic exposure is complete?

The signal that indicates the radiographic exposure is complete is an automatically activated indicator or timer. This system is designed to provide a reliable and clear indication when the exposure period has elapsed, ensuring that operators can safely proceed without the risk of premature equipment operation or exposure to radiation.

Using an automated indicator or timer minimizes the potential for human error, as it automatically monitors the exposure time based on pre-set conditions. When the exposure is completed, these systems ensure that appropriate signals are triggered, alerting personnel that it is safe to approach the equipment or proceed to the next steps in the radiographic process.

While other options, like loud sirens, flashing lights, or control panel messages, can also serve as indicators, they may not be as reliable or standard in all radiography setups. The use of an automated indicator or timer is a common industry practice designed to enhance safety and operational efficiency.