Medical reactors are specialized facilities that produce radioactive isotopes used in medical imaging and treatment. These isotopes are essential for procedures like PET scans and radiation therapy, helping doctors diagnose and treat various diseases, including cancer. The reactors operate by using nuclear fission to generate neutrons, which then interact with target materials to create the desired isotopes. Safety measures are crucial in these facilities to protect workers and the environment from radiation exposure, ensuring that the benefits of medical isotopes can be safely harnessed for patient care.