The radiation dose of the medical co-workers, patients, and patient's family in the study of nuclear medicine

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Practical methods for the radiation protection of medical co-workers and also patient's family in the PET study with FDG were evaluated.In the basic study, it was known that the HVL of lead and tungsten for 511keV photons was 4.1mm and 2.61mm individually. Standard syringe (1.6mm tungsten) shield reduces the exposure from F-18 by only 34.3%. A typical PET syringe shield is 8.6mm thick of tungsten, reducing the exposure from F-18 by 90%.In the clinical study, the radiation dose to the medical co-workers became average 0.294 to 0.769 uSv for one FDG PET study in patient with mean dose of 200MBq.From these results, it was thought to be that the practical methods, the use of shielding designed for PET and also the control of time, distance, and contamination should be completed to start the clinical PET.