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Administered activity Largest radiation dose Effective dose* Radiopharmaceutical MBq mCi Organ mGy/MBq rad/mCi mSv/MBq rem/mCi 99mTc-MAA† 40–150 1.1–4.1 Lung 0.067 0.25 0.011 0.041 99mTc-DTPA‡ 20–40 0.54–1.1 Bladder 0.047 0.17 0.0061 0.023 133Xe§ 200–750 5.4–20 Lung 0.0011 0.0041 0.00071 0.0026 81mKr‖ 40–400 1.1–11 Lung 0.00021 0.00078 0.000027 0.0001 Administered activity Largest radiation dose Effective dose Radiopharmaceutical MBq/kg mCi/kg Organ mGy/MBq rad/mCi mSv/MBq rem/mCi 99mTc MAA* 0.5–2 0.014–0.054 Lung 0.21 0.78 0.038 0.14 99mTc DTPA† 0.4–0.6 0.011–0.016 Bladder 0.12 0.44 0.020 0.074 133Xe‡ 10–12 0.27–0.32 Lung 0.0037 0.014 0.0027 0.010 81mKr§ 0.5–5 0.014–0.14 Lung 0.00068 0.0025 0.000088 0.00033 Fetal dose Stage of gestation mGy/MBq rad/mCi mGy* rad* Early 0.0028 0.010 0.11–0.42 0.011–0.042 3 mo 0.0040 0.015 0.16–0.60 0.016–0.060 6 mo 0.0050 0.018 0.20–0.75 0.020–0.075 9 mo 0.0040 0.015 0.16–0.60 0.016–0.060 ↵* Maternal administered activity, 40–150 MBq (1.1–1.4 mCi).
Data are from Russell et al. (7). No information about possible placental crossover of this compound was available for use in estimating fetal doses.
Fetal dose Stage of gestation mGy/MBq rad/mCi mGy* rad* Early 0.0058 0.021 0.12–0.23 0.012–0.023 3 mo 0.0043 0.016 0.086–0.17 0.0086–0.017 6 mo 0.0023 0.0085 0.046–0.092 0.0046–0.0092 9 mo 0.0030 0.011 0.060–0.12 0.0060–0.012 ↵* Maternal administered activity, 20–40 MBq (0.54–1.1 mCi).
Data are from Russell et al. (7). Information about possible placental crossover of this compound was available and was considered in estimates of fetal doses.
Fetal dose Stage of gestation mGy/MBq rad/mCi mGy* rad* Early 0.00025 0.00092 0.050–0.19 0.0050–0.019 3 mo 0.000029 0.00011 0.0058–0.022 0.00058–0.0022 6 mo 0.000021 0.000078 0.0042–0.016 0.00042–0.0016 9 mo 0.000016 0.000059 0.0032–0.01 0.00032–0.0012 ↵* Maternal administered activity, 200–750 MBq (5.4–20 mCi).
Data are from Russell et al. (7). No information about possible placental crossover of this compound was available for use in estimating fetal doses.
Fetal dose Stage of gestation mGy/MBq rad/mCi mGy* rad* Early 1.8 × 10−7 6.7 × 10−7 7.2 × 10−6 to 7.2 × 10−5 7.2 × 10−5 to 7.2 × 10−6 3 mo 1.8 × 10−7 6.7 × 10−7 7.2 × 10−6 to 7.2 × 10−5 7.2 × 10−5 to 7.2 × 10−6 6 mo 2.8 × 10−7 1.0 × 10−6 1.1 × 10−5 to 1.1 × 10−4 1.1 × 10−6 to 1.1 × 10−5 9 mo 3.4 × 10−7 1.3 × 10−6 1.4 × 10−5 to 1.4 × 10−4 1.4 × 10−6 to 1.4 × 10−5 ↵* Maternal administered activity 40–400 MBq (1.1–11 mCi).
Dose estimates to the fetus were not provided by Russell et al. (7) but were estimated using kinetic data in ICRP 53. No information about possible placental crossover of this compound was available for use in estimating fetal doses.
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