In fluoroscopy, what primarily aims to prevent radiation exposure to the patient?

The cumulative timer is crucial in fluoroscopy as it is specifically designed to monitor the cumulative exposure time of the patient to radiation. By alerting the radiologic technologist or practitioner when a certain threshold has been reached, the cumulative timer promotes awareness and encourages the operator to assess the necessity of continuing the exposure. This proactive approach significantly helps in managing radiation dose, ultimately aiming to minimize unnecessary radiation exposure to the patient.

While lead shielding, regular equipment calibration, and interlock systems also play important roles in radiation safety, they serve different purposes. Lead shielding can protect against scatter radiation, equipment calibration ensures that devices are functioning correctly, and interlock systems provide mechanical safety to prevent inappropriate activation of the equipment. However, none of these tools specifically monitor or manage the duration of exposure in the same way the cumulative timer does, highlighting the timer's primary role in preventing excessive radiation exposure to patients during procedures.