Specific Lab manual imaging questions Flashcards
What should the normal length of the cervix be?
3 cm or greater
If the spine is at the top of the screen in TRV, what position is the baby lying?
Prone
Why do we measure the most posterior lateral ventricle?
To make sure there is no reverberation artifact
What landmark in the head has a 1:1 ration with gestational age?
Cerebellum
What should the NF be 16-18 weeks?
< 5mm
What should the NF be 18-24 weeks?
< 6mm
What is the placental cord insertion called if it is 2cm or less away from the center of the placenta?
Marginal cord insertion
When is a placental cord insertion measurement required?
If the insertion is close to the edge of the placenta
How far should the inferior edge of the placenta be to the internal os?
3cm or more
What is the term used when the placenta is not covering the internal os but is less than 3 cm from the os?
Low lying placenta
What structures are seen in the ductal arch image?
Ductus arteriosus
PA
Descending aorta
What is seen in the 3VV?
Circular = SVC
Ao –> ductus arteriosus –> PA
How many planes should the fetal spine be assessed in?
3
What should the normal femur/foot ratio be?
Within 0.90 or 90% of each others measurements
How big are cysts in the ventricle to be considered a choroid plexus cyst?
3mm or greater
