Pregnancy and Breast feeding Flashcards
Recommendations for cessation of breastfeeding
FDG-PET
no recommendations to stop breastfeeding
Recommendations for cessation of breastfeeding
Tc-99m studies
stop breastfeeding for 12-24 hours
Recommendations for cessation of breastfeeding
I-131
stop breast feeding entirely for this baby
Recommendations for cessation of breastfeeding
Ga-67 studies
stop breastfeeding for 1 month
Recommendations for cessation of breastfeeding
In-111 studies
stop breastfeeding for 1 week
occupational worker fetal dose
5 mSv
Pulmonary embolism CTA maternal breast dose
10-70 mGy
CTPA fetal dose
0.1 - 0.7 mGy
CTPA breast dose and fetal dose
breast: 10-70 mGy
baby: 0.1 -0.7 mGy
VQ scan breast dose
<0.3 mGy
VQ scan baby dose
<0.3 mGy*
(0.1-0.37 mGy)
*easier to remember
VQ scan breast and baby dose
breast: <0.3 mGy
baby: <0.3 mGy
For an abdominal radiograph in a standard-sized patient (AP projection), the embryo dose is about
1 mGy.
fetal does is about 1/3 the entrance Kair.
- An adult AP abdomen has an entrance Kair of about 3 mGy, so the corresponding embryo dose would likely be 1 mGy.
For PA projections and lateral projections, embryo doses are about what fraction of the air kerma?
PA projections: 1/6 of the entrance Kair
Lateral projection: 1/20 of the entrance Kair
In fluoroscopy, for a PA projection, the dose rate at the embryo (i.e., uterus) will be about
1.5 mGy/minute in a normal-sized patient.
