Which of the following statements are true according to the ACR Manual on MRI Safety 2020? Select all that apply.

The correct answer highlights the importance of safety precautions in MRI environments, particularly in Zone 3, where access control is crucial. According to the ACR Manual on MRI Safety 2020, having ferrodetectors at the entrance of Zone 3 is essential for the safety of both personnel and patients. These detectors are designed to alert staff to the presence of ferromagnetic objects that could pose a risk in the vicinity of the MRI magnet. This proactive measure helps prevent accidents and ensures that individuals entering Zone 3 are thoroughly screened for metallic items, which is vital given the strong magnetic fields involved in MRI procedures.

To elaborate on the context of the other options, while there is a focus on patient screening and safety, the specifics about the protocols in Zone 3 and Zone 4 are structured to maintain a safe environment around the MRI scanner. Access controls, such as keypad or badge systems, are typically associated with Zone 4, ensuring that only authorized individuals can enter high-risk areas, where screening forms are ideally completed. Therefore, the emphasis on having the correct safety measures at the junction of Zones is paramount in preventing safety breaches in MRI settings.