Background: Nuclear medicine or diagnostic radiology personnel are always exposed to low-level radiation from radionuclides used in medical diagnostics, which lead to potential biological hazards or effects.
Objective: External exposure for workers in two nuclear medicine centers was measured by recruiting 120 patients.
Methods: Three nuclear medicine examinations were performed using F18-FDG PET/CT,Tc- MDP bones scan, and Tc thyroid scan by a digital radiation dosimeter.