The following table will be used as guidance to determine if an individual should be issued a dosimeter to monitor external dose. The guidelines are generally based on total activity used in 1 month. Activity Radioisotope(s) Type of Monitoring (mCi) C-14,H-3,P-33 & S-35 any amount none required < 6 mCi none required > 6 mCi ring dosimeter < 30 mCi P-32 ring dosimeter & body > 30 mCi dosimeter < 50 mCi none required Ca-45 > 50 mCi ring dosimeter < 50 mCi none required Low Energy Gamma Ray Emitters < 200 keV (e.g. I-123, I-125, Tc-99m, Tl-201) > 50 ring and body dosimeter < 2 mCi none required High Energy Gamma Ray Emitters > 2 mCi ring dosimeter < 5 mCi > 200 keV (e.g. Cr-51, I-131, Co-60, Cs-137, F- ring badge & whole body 18, N-13) > 5 mCi dosimeter
The following table will be used as guidance to determine if an individual should be issued a dosimeter to monitor external dose. The guidelines are generally based on total activity used in 1 month. Radioisotope(s) Activity (mCi) Type of Monitoring C-14,H-3,P-33 & S-35 any amount none required P-32 < 6 mCi none required > 6 mCi < 30 mCi ring dosimeter > 30 mCi ring dosimeter & body dosimeter Ca-45 < 50 mCi none required > 50 mCi ring dosimeter Low Energy Gamma Ray Emitters < 200 keV (e.g. I-123, I-125, Tc-99m, Tl-201) < 50 mCi none required > 50 ring and body dosimeter High Energy Gamma Ray Emitters > 200 keV (e.g. Cr-51, I-131, Co-60, Cs-137, F- 18, N-13) < 2 mCi none required > 2 mCi < 5 mCi ring dosimeter > 5 mCi ring badge & whole body dosimeter