According to the ACR Manual on MRI Safety 2020, which statement is true?

The correct statement pertains to the levels of personnel and their access to different MRI zones as defined by safety protocols. Level 1 personnel, who typically include individuals such as patients and their companions, are allowed to enter Zone III only when accompanied by qualified staff. Zone III generally requires a higher level of knowledge about MRI safety due to the risks associated with being in close proximity to the magnet.

In contrast, Zone IV, which includes the actual MRI room, has more stringent access requirements. Only Level 2 and Level 3 personnel are authorized to enter Zone IV unaccompanied, ensuring safety protocols are followed to mitigate risks associated with the strong magnetic fields and associated equipment.

Understanding the distinctions between the roles and their permissions in different zones is crucial for maintaining safety protocols in MRI environments. Therefore, the assertion that a Level 1 personnel can enter Zone III unaccompanied is correct in the context provided, as they are permitted to do so only under supervision, reflecting the controlled access required to help prevent any safety incidents.