Which of the following does NOT need to be posted in areas where x-ray machines are utilized?

The correct choice is that each physician's license for the healing arts does not need to be posted in areas where x-ray machines are utilized. In a clinical or radiology environment, there are specific regulations regarding what documentation must be readily accessible to both staff and patients.

Posting each x-ray supervisor and operator permit, as well as the certificates and fluoroscopy permits for certified radiologic technologists, is crucial because these credentials demonstrate compliance with state regulations and ensure that only qualified individuals operate x-ray equipment.

Additionally, the Radiologic Health Department Form RH-2364, "Notice to Employees," serves to inform workers about their rights and safety practices within the radiation environment. This form is important for compliance and safety standards, helping to protect employees from potential hazards associated with radiation exposure.

In contrast, while a physician's license is an important document for the medical practice, it is not a legal requirement to post it in areas with x-ray machines. The focus of posting requirements is primarily on safety and operational qualifications relevant to the use of x-ray technology. Thus, the physician's license does not pertain directly to the operational safety and regulatory compliance in the context of x-ray machine use, making it the correct answer.