Table 3.

Estimated Fetal Radiation Doses from Imaging Studies. (Adapted from: Obstetrics: Normal and Problem Pregnancies, 2017.)

Imaging Study	Estimated Fetal Dose (cGy)
Chest radiograph, 2 views	0.0002
Abdominal radiograph	0.1–0.3
Chest computed tomography	0.002–0.02
Abdominal computed tomography	2.5–3.5
Ventilation scan	0.007–0.05
Perfusion scan	0.04
Intravenous pyelography	0.6–1.0
Positron emission scan	1.0–1.5
Barium enema	0.7