ultrasound diagnosis of fatal anomalies

ULTRASOUND SCREENING
Fig. 1.27 Second screening, 18–21 weeks.
The same view as in the previous figure, with the
transducer slightly rotated. Flow from the ductus
arteriosus (Botallo’s duct)and aortic arch into the
descending aorta can be seen.
Fig. 1.28 Second screening, 18–21 weeks.
The aortic arch and its branches are demonstrated
using the color Doppler mode in a fetus lying dorsoanterior
21 weeks of gestation. This is a
paramedian longitudinal section left of the vertebral
column.
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Fig. 1.29 Second screening, 18–21 weeks.
Four-chamber view of the heart, showing the confluence
of the pulmonary vein (arrows)into the left
atriumat21+4weeks.
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