TABLE 2

The Pregnant or Potentially Pregnant Patient: Fetal Dose Estimates

Stage of gestationEstimated mean doseEstimated dose range
18F-fluoride*
 Early0.022 mGy/MBq (0.081 rad/mCi)4.1–8.1 mGy (0.41–0.81 rad)
 3 mo0.017 mGy/MBq (0.063 rad/mCi)3.1–6.3 mGy (0.31–0.63 rad)
 6 mo0.0075 mGy/MBq (0.028 rad/mCi)1.4–2.8 mGy (0.14–0.28 rad)
 9 mo0.0068 mGy/MBq (0.025 rad/mCi)1.3–2.5 mGy (0.13–0.25 rad)
99mTc-MDP†
 Early0.0061 mGy/MBq (0.023 rad/mCi)1.1–2.3 mGy (0.11–0.23 rad)
 3 mo0.0054 mGy/MBq (0.020 rad/mCi)1.0–2.0 mGy (0.10–0.20 rad)
 6 mo0.0027 mGy/MBq (0.010 rad/mCi)0.5–1.0 mGy (0.050–0.10 rad)
 9 mo0.0024 mGy/MBq (0.0089 rad/mCi)0.44–0.89 mGy (0.044–0.089 rad)

  • ↵* No information about possible placental crossover of this compound was available.

  • ↵† Information about possible placental crossover of this compound was available and was considered in estimates of fetal doses.

  • Data are from Russell et al. (44).