FE FE Doppler Assessment

Question 1

Which Doppler mode provides quantitative velocity measurements essential for fetal cardiac assessment?

Accepted Answer

Pulsed-wave Doppler

Answer

Color Doppler

Answer

Power Doppler

Answer

B-flow imaging

Question 2

The Doppler angle of insonation should ideally be less than how many degrees for accurate velocity measurement?

Accepted Answer

60 degrees

Answer

15 degrees

Answer

30 degrees

Answer

45 degrees

Question 3

Which Doppler waveform parameter reflects downstream vascular resistance?

Accepted Answer

Resistance index (RI)

Answer

Peak systolic velocity

Answer

End-diastolic velocity

Answer

Acceleration time

Question 4

In which fetal vessel is Doppler assessment used to predict the risk of fetal chromosomal aneurysm in the first trimester?

Accepted Answer

Ductus venosus

Answer

Middle cerebral artery

Answer

Umbilical artery

Answer

Umbilical vein

Question 5

Color Doppler aliasing in fetal echocardiography indicates:

Accepted Answer

Flow velocity exceeding the Nyquist limit

Answer

Absent flow

Answer

Turbulent retrograde flow only

Answer

Incorrect gain setting

Question 6

Which Doppler finding is characteristic of pulmonary stenosis in the fetus?

Accepted Answer

Increased pulmonary artery peak velocity with turbulence

Answer

Decreased pulmonary artery velocity

Answer

Reversed pulmonary artery flow

Answer

Normal pulmonary artery PI with color turbulence