Table 1.

Safety of commonly used radiological imaging for the management of COVID-19 in pregnancy⁸

Imaging modality	Fetal radiation dose	Radiation to a mother's breasts
	(Threshold for fetal damage is 50 mGy, each 1 mGy increases the risk of fatal childhood cancer up to the age of 15 years by 0.006%)	(10 mGy increases the lifetime risk of developing breast cancer by 13.6%; modern protocols may lead to reduced radiation)
CXR	0.0005 – 0.01 mGy	0.04 mGy
CTPA / CT of the thorax	0.1 mGy	3–10 mGy
V/Q	0.32 – 0.74 mGy	0.22 – 0.28 mGy
US Doppler	n/a	n/a

CT = computed tomography; CTPA = computed tomography pulmonary angiography; CXR = chest X-ray; US = ultrasound; V/Q = ventilation–perfusion scan.