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ULTRASOUND OF THE
RIBS |
Because of their horizontal orientation in fetal life, individual ribs can be image by obtaining transverse views of the fetal chest or abdomen.
The entire length of the rib, especially the proximal portion close to its articulation with the spine is not usually imaged in the same plane as the main portion of the rib.
- Axial view of the thorax at the level of the four-chamber view of the heart.
- Trace length of fetal rib using electronic calipers.
- Continue the measurement to the lateral edge of the spine along the curvature of the rib.
- Rib length correlates with gestational age in a linear fashion (however there is a wide standard of error).
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REFERENCES |