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Average (minimum–maximum) radiation doses associated with single-photon emission CT (SPECT) and CT pulmonary angiography (CTPA)
| Dose | SPECT (n = 89) |
CTPA (n = 23) | ||
|---|---|---|---|---|
| Q (n = 89) | V (n = 13) | Q + V (n = 89) | ||
| Maternal effective dose (mSv) | 1.4 (0.7–2.8) | 0.82 | 1.6 (0.70–3.6) | 7.8 (2–18) |
| Maternal breast dosea (mSv) | 0.49 (0.24–1.0) | 0.29 | 0.56 (0.24–1.3) | 20 (4–50) |
| Foetal dosea (µSv) | 71 (33–130) | 22 | 77 (33–150) | 110 (3.7–380) |
Q, perfusion; V, ventilation.
Equivalent dose.
